Merge branch 'master' into audio

build.gradle

@@ -18,10 +18,12 @@ dependencies {
     implementation 'ru.windcorp.fork.io.github.java-graphics:glm:1.0.1'
 
 	// log4j
-	compile group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
+	implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '2.13.3'
-	compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
+	implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.3'
 
 	testImplementation 'junit:junit:4.12'
+	
+	// See also LWJGL dependencies below
 }
 
 /*
@@ -77,3 +79,22 @@ dependencies {
 }
 
 // LWJGL END
+
+jar {
+    manifest {
+        attributes(
+        	"Main-Class": "ru.windcorp.progressia.client.ProgressiaClientMain",
+        	"Class-Path": configurations.runtimeClasspath.collect { "lib/" + it.getName() }.join(' ')
+        )
+    }
+}
+
+/*
+ * Copies runtime dependencies to a prespecified location so they can be packaged properly.
+ */
+task copyLibs(type: Copy) {
+    into "${libsDir}/lib"
+    from configurations.runtimeClasspath
+}
+
+build.dependsOn(copyLibs)

src/main/java/ru/windcorp/jputil/ArrayUtil.java

@@ -66,6 +66,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(byte[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(short[] array, short element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -107,6 +119,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(short[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(int[] array, int element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -148,6 +172,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(int[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(long[] array, long element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -189,6 +225,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(long[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(float[] array, float element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -230,6 +278,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(float[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+
 	public static int firstIndexOf(double[] array, double element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -271,6 +331,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(double[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(boolean[] array, boolean element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -340,6 +412,18 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static boolean isSorted(char[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			if ((array[i] < array[i + 1]) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static int firstIndexOf(Object[] array, Object element) {
 		for (int i = 0; i < array.length; ++i) {
 			if (array[i] == element) {
@@ -422,6 +506,20 @@ public class ArrayUtil {
 		return -1;
 	}
 	
+	public static <T extends Comparable<T>> boolean isSorted(T[] array, boolean ascending) {
+		for (int i = 0; i < array.length - 1; ++i) {
+			if (array[i] == array[i + 1]) continue;
+			
+			int order = array[i].compareTo(array[i + 1]);
+			
+			if ((order < 0) != ascending) {
+				return false;
+			}
+		}
+		
+		return true;
+	}
+	
 	public static long sum(byte[] array, int start, int length) {
 		long s = 0;
 		length += start;

src/main/java/ru/windcorp/jputil/chars/StringUtil.java

@@ -26,8 +26,11 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
+import java.util.Objects;
 import java.util.function.IntFunction;
 
+import ru.windcorp.jputil.ArrayUtil;
+
 public class StringUtil {
 	
 	private StringUtil() {}
@@ -368,6 +371,106 @@ public class StringUtil {
 		return result;
 	}
 	
+	/**
+	 * Splits {@code src} at index {@code at} discarding the character at that index.
+	 * <p>
+	 * Indices {@code 0} and {@code src.length() - 1} produce {@code str} excluding
+	 * the specified character and {@code ""}.
+	 * <p>
+	 * @param src the String to split
+	 * @param at index to split at
+	 * @throws IllegalArgumentException if the index is out of bounds for {@code src}
+	 * @return an array containing the substrings, in order of encounter in {@code src}.
+	 * Its length is always 2.
+	 */
+	public static String[] splitAt(String src, int at) {
+		Objects.requireNonNull(src, "src");
+		
+		if (at < 0) {
+			throw new StringIndexOutOfBoundsException(at);
+		} else if (at >= src.length()) {
+			throw new StringIndexOutOfBoundsException(at);
+		}
+		
+		if (at == 0) {
+			return new String[] {"", src.substring(1)};
+		} else if (at == src.length()) {
+			return new String[] {src.substring(0, src.length() - 1), ""};
+		}
+		
+		return new String[] {
+				src.substring(0, at),
+				src.substring(at + 1)
+		};
+	}
+	
+	/**
+	 * Splits {@code src} at indices {@code at} discarding characters at those indices.
+	 * <p>
+	 * Indices {@code 0} and {@code src.length() - 1} produce extra zero-length outputs.
+	 * Duplicate indices produce extra zero-length outputs.
+	 * <p>
+	 * Examples:
+	 * <pre>
+	 * splitAt("a.b.c", new int[] {1, 3})    -> {"a", "b", "c"}
+	 * splitAt("a..b",  new int[] {1, 2})    -> {"a", "", "b"}
+	 * splitAt(".b.",   new int[] {0, 2})    -> {"", "b", ""}
+	 * splitAt("a.b",   new int[] {1, 1, 1}) -> {"a", "", "", "b"}
+	 * </pre>
+	 * @param src the String to split
+	 * @param at indices to split at, in any order
+	 * @throws IllegalArgumentException if some index is out of bounds for {@code src}
+	 * @return an array containing the substrings, in order of encounter in {@code src}.
+	 * Its length is always {@code at.length + 1}.
+	 */
+	public static String[] splitAt(String src, int... at) {
+		Objects.requireNonNull(src, "src");
+		Objects.requireNonNull(at, "at");
+		
+		if (at.length == 0) return new String[] {src};
+		if (at.length == 1) return splitAt(src, at[0]);
+		
+		int[] indices; // Always sorted
+		
+		if (ArrayUtil.isSorted(at, true)) {
+			indices = at;
+		} else {
+			indices = at.clone();
+			Arrays.sort(indices);
+		}
+		
+		if (indices[0] < 0) {
+			throw new StringIndexOutOfBoundsException(indices[0]);
+		} else if (indices[indices.length - 1] >= src.length()) {
+			throw new StringIndexOutOfBoundsException(indices[indices.length - 1]);
+		}
+		
+		String[] result = new String[at.length + 1];
+		
+		int start = 0;
+		int resultIndex = 0;
+		for (int index : indices) {
+			int end = index;
+			
+			String substring;
+			
+			if (end <= start) {
+				// Duplicate or successive index
+				substring = "";
+			} else {
+				substring = src.substring(start, end);
+			}
+			
+			result[resultIndex] = substring;
+			resultIndex++;
+			start = end + 1;
+		}
+		
+		result[resultIndex] = src.substring(start);
+		
+		return result;
+	}
+	
 	private static IllegalArgumentException illegalArrayLength(int length) {
 		return new IllegalArgumentException("arrayLength must be non-negative (" + length + ")");
 	}
@@ -775,4 +878,35 @@ public class StringUtil {
 		else             return (char) ('A' - 0xA + value);
 	}
 	
+	public static String replaceAll(String source, String substring, String replacement) {
+		Objects.requireNonNull(source, "source");
+		Objects.requireNonNull(substring, "substring");
+		
+		if (substring.isEmpty()) {
+			throw new IllegalArgumentException("substring is empty");
+		}
+
+		if (!source.contains(substring)) { // also passes if source is empty
+			return source;
+		}
+		
+		if (substring.equals(replacement)) { // null-safe
+			return source;
+		}
+		
+		StringBuilder sb = new StringBuilder(2 * source.length());
+		
+		for (int i = 0; i < source.length() - substring.length() + 1; ++i) {
+			if (source.startsWith(substring, i)) {
+				if (replacement != null) {
+					sb.append(replacement);
+				}
+			} else {
+				sb.append(source.charAt(i));
+			}
+		}
+		
+		return sb.toString();
+	}
+	
 }

src/main/java/ru/windcorp/progressia/ProgressiaLauncher.java

@@ -17,10 +17,23 @@
  *******************************************************************************/
 package ru.windcorp.progressia;
 
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+import ru.windcorp.progressia.common.util.crash.analyzers.OutOfMemoryAnalyzer;
+import ru.windcorp.progressia.common.util.crash.providers.OSContextProvider;
+
 public class ProgressiaLauncher {
 
 	public static void launch(String[] args, Proxy proxy) {
+		setupCrashReports();
 		proxy.initialize();
 	}
 
+	private static void setupCrashReports() {
+		CrashReports.registerProvider(new OSContextProvider());
+		CrashReports.registerAnalyzer(new OutOfMemoryAnalyzer());
+		Thread.setDefaultUncaughtExceptionHandler((Thread thread, Throwable t)-> {
+			CrashReports.report(t,"Uncaught exception in thread %s", thread.getName());
+		});
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/Client.java

@@ -3,6 +3,7 @@ package ru.windcorp.progressia.client;
 import ru.windcorp.progressia.client.comms.DefaultClientCommsListener;
 import ru.windcorp.progressia.client.comms.ServerCommsChannel;
 import ru.windcorp.progressia.client.graphics.world.Camera;
+import ru.windcorp.progressia.client.graphics.world.LocalPlayer;
 import ru.windcorp.progressia.client.world.WorldRender;
 import ru.windcorp.progressia.common.world.WorldData;
 import ru.windcorp.progressia.common.world.entity.EntityData;
@@ -10,7 +11,7 @@ import ru.windcorp.progressia.common.world.entity.EntityData;
 public class Client {
 	
 	private final WorldRender world;
-	private EntityData localPlayer;
+	private LocalPlayer localPlayer;
 	
 	private final Camera camera = new Camera((float) Math.toRadians(70));
 	
@@ -27,12 +28,12 @@ public class Client {
 		return world;
 	}
 	
-	public EntityData getLocalPlayer() {
+	public LocalPlayer getLocalPlayer() {
 		return localPlayer;
 	}
 	
 	public void setLocalPlayer(EntityData localPlayer) {
-		this.localPlayer = localPlayer;
+		this.localPlayer = new LocalPlayer(localPlayer);
 	}
 	
 	public Camera getCamera() {

src/main/java/ru/windcorp/progressia/client/ClientProxy.java

@@ -26,6 +26,7 @@ import ru.windcorp.progressia.client.graphics.font.Typefaces;
 import ru.windcorp.progressia.client.graphics.texture.Atlases;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
 import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.server.ServerState;
 import ru.windcorp.progressia.test.TestContent;
 
@@ -39,8 +40,7 @@ public class ClientProxy implements Proxy {
 			RenderTaskQueue.waitAndInvoke(WorldRenderProgram::init);
 			RenderTaskQueue.waitAndInvoke(() -> Typefaces.setDefault(GNUUnifontLoader.load(ResourceManager.getResource("assets/unifont-13.0.03.hex.gz"))));
 		} catch (InterruptedException e) {
-			// TODO Auto-generated catch block
+			CrashReports.report(e, "ClientProxy failed");
-			e.printStackTrace();
 		}
 		
 		TestContent.registerContent();

src/main/java/ru/windcorp/progressia/client/ClientState.java

@@ -3,10 +3,10 @@ package ru.windcorp.progressia.client;
 import ru.windcorp.progressia.client.comms.localhost.LocalServerCommsChannel;
 import ru.windcorp.progressia.client.graphics.GUI;
 import ru.windcorp.progressia.client.graphics.flat.LayerTestUI;
-import ru.windcorp.progressia.client.graphics.gui.LayerTestGUI;
 import ru.windcorp.progressia.client.graphics.world.LayerWorld;
 import ru.windcorp.progressia.common.world.WorldData;
 import ru.windcorp.progressia.server.ServerState;
+import ru.windcorp.progressia.test.LayerTestGUI;
 
 public class ClientState {
 	
@@ -30,6 +30,8 @@ public class ClientState {
 		
 		Client client = new Client(world, channel);
 		
+		world.tmp_generate();
+		
 		channel.connect();
 		
 		setInstance(client);

src/main/java/ru/windcorp/progressia/client/comms/DefaultClientCommsListener.java

@@ -1,15 +1,16 @@
 package ru.windcorp.progressia.client.comms;
 
 import java.io.IOException;
+
+import ru.windcorp.jputil.chars.StringUtil;
 import ru.windcorp.progressia.client.Client;
 import ru.windcorp.progressia.client.graphics.world.EntityAnchor;
-import ru.windcorp.progressia.client.world.ChunkRender;
 import ru.windcorp.progressia.common.comms.CommsListener;
 import ru.windcorp.progressia.common.comms.packets.Packet;
 import ru.windcorp.progressia.common.comms.packets.PacketSetLocalPlayer;
 import ru.windcorp.progressia.common.comms.packets.PacketWorldChange;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.common.world.entity.EntityData;
-import ru.windcorp.progressia.common.world.entity.PacketEntityChange;
 
 // TODO refactor with no mercy
 public class DefaultClientCommsListener implements CommsListener {
@@ -26,10 +27,6 @@ public class DefaultClientCommsListener implements CommsListener {
 			((PacketWorldChange) packet).apply(
 					getClient().getWorld().getData()
 			);
-			
-			if (!(packet instanceof PacketEntityChange)) {
-				tmp_reassembleWorld();
-			}
 		} else if (packet instanceof PacketSetLocalPlayer) {
 			setLocalPlayer((PacketSetLocalPlayer) packet);
 		}
@@ -41,7 +38,11 @@ public class DefaultClientCommsListener implements CommsListener {
 		);
 		
 		if (entity == null) {
-			throw new RuntimeException("");
+			CrashReports.report(
+					null,
+					"Player entity with ID %s not found",
+					new String(StringUtil.toFullHex(packet.getLocalPlayerEntityId()))
+			);
 		}
 
 		getClient().setLocalPlayer(entity);
@@ -50,10 +51,6 @@ public class DefaultClientCommsListener implements CommsListener {
 		));
 	}
 
-	private void tmp_reassembleWorld() {
-		getClient().getWorld().getChunks().forEach(ChunkRender::markForUpdate);
-	}
-
 	@Override
 	public void onIOError(IOException reason) {
 		// TODO implement

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTrigger.java

@@ -1,11 +1,11 @@
 package ru.windcorp.progressia.client.comms.controls;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 public abstract class ControlTrigger extends Namespaced {
 
-	public ControlTrigger(String namespace, String name) {
+	public ControlTrigger(String id) {
-		super(namespace, name);
+		super(id);
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggerInputBased.java

@@ -5,8 +5,8 @@ import ru.windcorp.progressia.common.comms.controls.PacketControl;
 
 public abstract class ControlTriggerInputBased extends ControlTrigger {
 
-	public ControlTriggerInputBased(String namespace, String name) {
+	public ControlTriggerInputBased(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	public abstract PacketControl onInputEvent(InputEvent event);

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggerLambda.java

@@ -0,0 +1,48 @@
+package ru.windcorp.progressia.client.comms.controls;
+
+import java.util.function.BiConsumer;
+import java.util.function.Predicate;
+
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.common.comms.controls.ControlData;
+import ru.windcorp.progressia.common.comms.controls.ControlDataRegistry;
+import ru.windcorp.progressia.common.comms.controls.PacketControl;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedUtil;
+
+public class ControlTriggerLambda extends ControlTriggerInputBased {
+	
+	private final String packetId;
+	private final Predicate<InputEvent> predicate;
+	private final BiConsumer<InputEvent, ControlData> dataWriter;
+
+	public ControlTriggerLambda(
+			String id,
+			Predicate<InputEvent> predicate,
+			BiConsumer<InputEvent, ControlData> dataWriter
+	) {
+		super(id);
+		
+		this.packetId = NamespacedUtil.getId(
+				NamespacedUtil.getNamespace(id),
+				"ControlKeyPress" + NamespacedUtil.getName(id)
+		);
+		
+		this.predicate = predicate;
+		this.dataWriter = dataWriter;
+	}
+
+	@Override
+	public PacketControl onInputEvent(InputEvent event) {
+		if (!predicate.test(event)) return null;
+		
+		PacketControl packet = new PacketControl(
+				packetId,
+				ControlDataRegistry.getInstance().create(getId())
+		);
+		
+		dataWriter.accept(event, packet.getControl());
+		
+		return packet;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggerOnKeyPress.java

@@ -1,39 +0,0 @@
-package ru.windcorp.progressia.client.comms.controls;
-
-import java.util.function.Predicate;
-
-import ru.windcorp.progressia.client.graphics.input.InputEvent;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
-import ru.windcorp.progressia.common.comms.controls.ControlDataRegistry;
-import ru.windcorp.progressia.common.comms.controls.PacketControl;
-
-public class ControlTriggerOnKeyPress extends ControlTriggerInputBased {
-	
-	private final Predicate<KeyEvent> predicate;
-	private final PacketControl packet;
-
-	public ControlTriggerOnKeyPress(
-			String namespace, String name,
-			Predicate<KeyEvent> predicate
-	) {
-		super(namespace, name);
-		this.predicate = predicate;
-		this.packet = new PacketControl(
-				getNamespace(), "ControlKeyPress" + getName(),
-				ControlDataRegistry.getInstance().get(getId())
-		);
-	}
-
-	@Override
-	public PacketControl onInputEvent(InputEvent event) {
-		if (!(event instanceof KeyEvent)) return null;
-		
-		KeyEvent keyEvent = (KeyEvent) event;
-		
-		if (!keyEvent.isPress()) return null;
-		if (!predicate.test(keyEvent)) return null;
-		
-		return packet;
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggerRegistry.java

@@ -1,8 +1,8 @@
 package ru.windcorp.progressia.client.comms.controls;
 
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
 
-public class ControlTriggerRegistry extends NamespacedRegistry<ControlTrigger> {
+public class ControlTriggerRegistry extends NamespacedInstanceRegistry<ControlTrigger> {
 	
 	private static final ControlTriggerRegistry INSTANCE =
 			new ControlTriggerRegistry();

src/main/java/ru/windcorp/progressia/client/comms/controls/ControlTriggers.java

@@ -0,0 +1,176 @@
+package ru.windcorp.progressia.client.comms.controls;
+
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+import ru.windcorp.progressia.client.graphics.input.InputEvent;
+import ru.windcorp.progressia.common.comms.controls.ControlData;
+
+public class ControlTriggers {
+	
+	public static ControlTriggerInputBased of(
+			String id,
+			BiConsumer<InputEvent, ControlData> dataWriter,
+			Predicate<InputEvent> predicate
+	) {
+		return new ControlTriggerLambda(id, predicate, dataWriter);
+	}
+	
+	public static ControlTriggerInputBased of(
+			String id,
+			Consumer<ControlData> dataWriter,
+			Predicate<InputEvent> predicate
+	) {
+		return of(
+				id,
+				(input, control) -> dataWriter.accept(control),
+				predicate
+		);
+	}
+	
+	public static ControlTriggerInputBased of(
+			String id,
+			Predicate<InputEvent> predicate
+	) {
+		return of(
+				id,
+				(input, control) -> {},
+				predicate
+		);
+	}
+	
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased of(
+			String id,
+			Class<I> inputType,
+			BiConsumer<I, ControlData> dataWriter,
+			Predicate<I>... predicates
+	) {
+		return of(
+				id,
+				createCheckedDataWriter(inputType, dataWriter),
+				createCheckedCompoundPredicate(inputType, predicates)
+		);
+	}
+	
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased of(
+			String id,
+			Class<I> inputType,
+			Consumer<ControlData> dataWriter,
+			Predicate<I>... predicates
+	) {
+		return of(
+				id,
+				inputType,
+				(input, control) -> dataWriter.accept(control),
+				predicates
+		);
+	}
+	
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased of(
+			String id,
+			Class<I> inputType,
+			Predicate<I>... predicates
+	) {
+		return of(
+				id,
+				(input, control) -> {},
+				createCheckedCompoundPredicate(inputType, predicates)
+		);
+	}
+	
+	@SafeVarargs
+	public static ControlTriggerInputBased of(
+			String id,
+			BiConsumer<InputEvent, ControlData> dataWriter,
+			Predicate<InputEvent>... predicates
+	) {
+		return of(
+				id,
+				InputEvent.class,
+				dataWriter,
+				predicates
+		);
+	}
+	
+	@SafeVarargs
+	public static <I extends InputEvent> ControlTriggerInputBased of(
+			String id,
+			Consumer<ControlData> dataWriter,
+			Predicate<InputEvent>... predicates
+	) {
+		return of(
+				id,
+				(input, control) -> dataWriter.accept(control),
+				predicates
+		);
+	}
+	
+	@SafeVarargs
+	public static ControlTriggerInputBased of(
+			String id,
+			Predicate<InputEvent>... predicates
+	) {
+		return of(
+				id,
+				InputEvent.class,
+				(input, control) -> {},
+				predicates
+		);
+	}
+
+	private static
+	<I extends InputEvent>
+	BiConsumer<InputEvent, ControlData>
+	createCheckedDataWriter(
+			Class<I> inputType,
+			BiConsumer<I, ControlData> dataWriter
+	) {
+		return (inputEvent, control) -> dataWriter.accept(inputType.cast(inputEvent), control);
+	}
+	
+	private static
+	<I extends InputEvent>
+	Predicate<InputEvent>
+	createCheckedCompoundPredicate(
+			Class<I> inputType,
+			Predicate<I>[] predicates
+	) {
+		return new CompoundCastPredicate<>(inputType, predicates);
+	}
+	
+	private static class CompoundCastPredicate<I extends InputEvent> implements Predicate<InputEvent> {
+		
+		private final Class<I> inputType;
+		private final Predicate<I>[] predicates;
+		
+		public CompoundCastPredicate(Class<I> inputType, Predicate<I>[] predicates) {
+			this.inputType = inputType;
+			this.predicates = predicates;
+		}
+
+		@Override
+		public boolean test(InputEvent inputEvent) {
+			if (!inputType.isInstance(inputEvent)) {
+				return false;
+			}
+			
+			I castEvent = inputType.cast(inputEvent);
+			
+			for (Predicate<I> predicate : predicates) {
+				if (!predicate.test(castEvent)) {
+					return false;
+				}
+			}
+			
+			return true;
+		}
+		
+	}
+
+	private ControlTriggers() {}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/backend/shaders/Program.java

@@ -24,6 +24,7 @@ import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker;
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker.OpenGLDeletable;
 import ru.windcorp.progressia.client.graphics.backend.shaders.attributes.Attribute;
 import ru.windcorp.progressia.client.graphics.backend.shaders.uniforms.Uniform;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Program implements OpenGLDeletable {
 
@@ -39,7 +40,7 @@ public class Program implements OpenGLDeletable {
 		glLinkProgram(handle);
 
 		if (glGetProgrami(handle, GL_LINK_STATUS) == GL_FALSE) {
-			throw new RuntimeException("Bad program:\n" + glGetProgramInfoLog(handle));
+			CrashReports.report(null, "Bad program:\n%s", glGetProgramInfoLog(handle));
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/backend/shaders/Shader.java

@@ -26,12 +26,12 @@ import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker;
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker.OpenGLDeletable;
 import ru.windcorp.progressia.common.resource.Resource;
 import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Shader implements OpenGLDeletable {
 
 	public static enum ShaderType {
-		VERTEX(GL_VERTEX_SHADER),
+		VERTEX(GL_VERTEX_SHADER), FRAGMENT(GL_FRAGMENT_SHADER);
-		FRAGMENT(GL_FRAGMENT_SHADER);
 
 		private final int glCode;
 
@@ -79,7 +79,7 @@ public class Shader implements OpenGLDeletable {
 		if (glGetShaderi(handle, GL_COMPILE_STATUS) == GL_FALSE) {
 			System.out.println("***************** ERROR ******************");
 			System.out.println(source);
-			throw new RuntimeException("Bad shader:\n" + glGetShaderInfoLog(handle));
+			CrashReports.report(null, "Bad shader:\n %s", glGetShaderInfoLog(handle));
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/backend/shaders/attributes/Attribute.java

@@ -18,6 +18,7 @@
 package ru.windcorp.progressia.client.graphics.backend.shaders.attributes;
 
 import ru.windcorp.progressia.client.graphics.backend.shaders.Program;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Attribute {
 
@@ -26,7 +27,7 @@ public class Attribute {
 
 	public Attribute(int handle, Program program) {
 		if (handle < 0) {
-			throw new RuntimeException("Bad handle: " + handle);
+			CrashReports.report(null, "Bad handle: %d", handle);
 		}
 
 		this.handle = handle;

src/main/java/ru/windcorp/progressia/client/graphics/backend/shaders/uniforms/Uniform.java

@@ -18,6 +18,7 @@
 package ru.windcorp.progressia.client.graphics.backend.shaders.uniforms;
 
 import ru.windcorp.progressia.client.graphics.backend.shaders.Program;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Uniform {
 
@@ -26,7 +27,7 @@ public class Uniform {
 
 	public Uniform(int handle, Program program) {
 		if (handle < 0) {
-			throw new RuntimeException("Bad handle: " + handle);
+			CrashReports.report(null, "Bad handle: %d", handle);
 		}
 
 		this.handle = handle;

src/main/java/ru/windcorp/progressia/client/graphics/font/GNUUnifontLoader.java

@@ -21,14 +21,13 @@ import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.client.graphics.texture.TextureDataEditor;
 import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
 import ru.windcorp.progressia.common.resource.Resource;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class GNUUnifontLoader {
 
-	private static final AtlasGroup ATLAS_GROUP_GNU_UNIFONT =
+	private static final AtlasGroup ATLAS_GROUP_GNU_UNIFONT = new AtlasGroup("GNUUnifont", 1 << 12);
-			new AtlasGroup("GNUUnifont", 1 << 12);
 
-	private static final TextureSettings TEXTURE_SETTINGS =
+	private static final TextureSettings TEXTURE_SETTINGS = new TextureSettings(false);
-			new TextureSettings(false);
 
 	private static final int BITS_PER_HEX_DIGIT = 4;
 	private static final int PREFIX_LENGTH = "0000:".length();
@@ -55,29 +54,17 @@ public class GNUUnifontLoader {
 
 	public static GNUUnifont load(Resource resource) {
 		try (BufferedReader reader = createReader(resource)) {
-			return createStream(reader)
+			return createStream(reader).map(GNUUnifontLoader::parse).map(GNUUnifontLoader::addToAtlas)
-					.map(GNUUnifontLoader::parse)
+					.collect(Collectors.collectingAndThen(createMapper(), GNUUnifont::new));
-					.map(GNUUnifontLoader::addToAtlas)
-					.collect(Collectors.collectingAndThen(
-							createMapper(),
-							GNUUnifont::new
-					));
 		} catch (IOException | UncheckedIOException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not load GNUUnifont");
+			return null;
 		}
 	}
 
-	private static BufferedReader createReader(Resource resource)
+	private static BufferedReader createReader(Resource resource) throws IOException {
-			throws IOException
-	{
 		return new BufferedReader(
-				new InputStreamReader(
+				new InputStreamReader(new GZIPInputStream(resource.getInputStream()), StandardCharsets.UTF_8));
-						new GZIPInputStream(
-								resource.getInputStream()
-						),
-						StandardCharsets.UTF_8
-				)
-		);
 	}
 
 	private static Stream<String> createStream(BufferedReader reader) {
@@ -85,38 +72,37 @@ public class GNUUnifontLoader {
 	}
 
 	private static ParsedGlyph parse(String declar) {
+		try {
+			
 			int width = getWidth(declar);
 			checkDeclaration(declar, width);
 		
 			char c = getChar(declar);
 		
-		TextureDataEditor editor = new TextureDataEditor(
+			TextureDataEditor editor = new TextureDataEditor(width, GNUUnifont.HEIGHT, width, GNUUnifont.HEIGHT,
-				width, GNUUnifont.HEIGHT,
+					TEXTURE_SETTINGS);
-				width, GNUUnifont.HEIGHT,
-				TEXTURE_SETTINGS
-		);
 		
 			for (int y = 0; y < GNUUnifont.HEIGHT; ++y) {
 				for (int x = 0; x < width; ++x) {
 					int bit = x + y * width;
 		
-				editor.setPixel(
+					editor.setPixel(x, GNUUnifont.HEIGHT - y - 1, getBit(declar, bit) ? 0xFFFFFFFF : 0x00000000);
-						x, GNUUnifont.HEIGHT - y - 1,
-						getBit(declar, bit) ? 0xFFFFFFFF : 0x00000000
-				);
 				}
 			}
 		
 			return new ParsedGlyph(c, editor);
+		
+		} catch (IOException e) {
+			CrashReports.report(e, "Could not load GNUUnifont: could not load character \"%s\"", declar);
+			return null;
+		}
 	}
 
 	private static char getChar(String declar) {
 		int result = 0;
 
 		for (int i = 0; i < 4; ++i) {
-			result = 
+			result = (result << BITS_PER_HEX_DIGIT) | getHexValue(declar.charAt(i));
-					(result << BITS_PER_HEX_DIGIT) |
-					getHexValue(declar.charAt(i));
 		}
 
 		return (char) result;
@@ -138,35 +124,39 @@ public class GNUUnifontLoader {
 		return meaningfulChars / charsPerColumn;
 	}
 
-	private static void checkDeclaration(String declar, int width) {
+	private static void checkDeclaration(String declar, int width) throws IOException {
 		if (!GNUUnifont.WIDTHS.contains(width)) {
-			throw new RuntimeException("Width " + width + " is not supported (in declar \"" + declar + "\")");
+			throw new IOException("Width " + width + " is not supported (in declar \"" + declar + "\")");
 		}
 		
 		if ((declar.length() - PREFIX_LENGTH) % width != 0) {
-			throw new RuntimeException("Declar \"" + declar + "\" has invalid length");
+			throw new IOException("Declar \"" + declar + "\" has invalid length");
 		}
 		
 		for (int i = 0; i < declar.length(); ++i) {
 			if (i == BITS_PER_HEX_DIGIT) {
 				if (declar.charAt(i) != ':') {
-					throw new RuntimeException("No colon ':' found in declar \"" + declar + "\" at index 4");
+					throw new IOException("No colon ':' found in declar \"" + declar + "\" at index 4");
 				}
 			} else {
 				char c = declar.charAt(i);
 				
 				if (!((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F'))) {
-					throw new RuntimeException("Illegal char in declar \"" + declar + "\" at index " + i + "; expected 0-9A-F");
+					throw new IOException("Illegal char in declar \"" + declar + "\" at index " + i + "; expected 0-9A-F");
 				}
 			}
 		}
 	}
 
 	private static int getHexValue(char digit) {
-		if (digit < '0') throw new NumberFormatException(digit + " is not a hex digit (0-9A-F expected)");
+		if (digit < '0')
-		if (digit <= '9') return digit - '0';
+			throw new NumberFormatException(digit + " is not a hex digit (0-9A-F expected)");
-		if (digit < 'A') throw new NumberFormatException(digit + " is not a hex digit (0-9A-F expected)");
+		if (digit <= '9')
-		if (digit <= 'F') return digit - 'A' + 0xA;
+			return digit - '0';
+		if (digit < 'A')
+			throw new NumberFormatException(digit + " is not a hex digit (0-9A-F expected)");
+		if (digit <= 'F')
+			return digit - 'A' + 0xA;
 		throw new NumberFormatException(digit + " is not a hex digit (0-9A-F expected)");
 	}
 
@@ -175,11 +165,8 @@ public class GNUUnifontLoader {
 		return new AtlasGlyph(glyph.c, new SimpleTexture(sprite));
 	}
 
-	private static
+	private static Collector<AtlasGlyph, ?, TCharObjectMap<Texture>> createMapper() {
-	Collector<AtlasGlyph, ?, TCharObjectMap<Texture>>
+		return Collector.of(TCharObjectHashMap<Texture>::new,
-	createMapper() {
-		return Collector.of(
-				TCharObjectHashMap<Texture>::new,
 
 				(map, glyph) -> map.put(glyph.c, glyph.texture),
 
@@ -188,10 +175,10 @@ public class GNUUnifontLoader {
 					return a;
 				},
 
-				Characteristics.UNORDERED
+				Characteristics.UNORDERED);
-		);
 	}
 
-	private GNUUnifontLoader() {}
+	private GNUUnifontLoader() {
+	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/gui/Component.java

@@ -39,11 +39,11 @@ import ru.windcorp.progressia.client.graphics.input.bus.Input;
 import ru.windcorp.progressia.client.graphics.input.bus.InputBus;
 import ru.windcorp.progressia.client.graphics.input.bus.InputListener;
 import ru.windcorp.progressia.common.util.Named;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Component extends Named {
 
-	private final List<Component> children =
+	private final List<Component> children = Collections.synchronizedList(new CopyOnWriteArrayList<>());
-			Collections.synchronizedList(new CopyOnWriteArrayList<>());
 
 	private Component parent = null;
 
@@ -88,7 +88,8 @@ public class Component extends Named {
 
 	public Component getChild(int index) {
 		synchronized (getChildren()) {
-			if (index < 0 || index >= getChildren().size()) return null;
+			if (index < 0 || index >= getChildren().size())
+				return null;
 			return getChildren().get(index);
 		}
 	}
@@ -107,7 +108,8 @@ public class Component extends Named {
 	}
 
 	public void moveChild(Component child, int newIndex) {
-		if (newIndex == -1) newIndex = getChildren().size() - 1;
+		if (newIndex == -1)
+			newIndex = getChildren().size() - 1;
 
 		if (getChildren().remove(child)) {
 			getChildren().add(newIndex, child);
@@ -123,7 +125,8 @@ public class Component extends Named {
 	}
 
 	public Component addChild(Component child, int index) {
-		if (index == -1) index = getChildren().size();
+		if (index == -1)
+			index = getChildren().size();
 
 		invalidate();
 		getChildren().add(index, child);
@@ -232,7 +235,7 @@ public class Component extends Named {
 
 			valid = true;
 		} catch (Exception e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not layout Component %s", this);
 		}
 	}
 
@@ -245,7 +248,7 @@ public class Component extends Named {
 			try {
 				return getLayout().calculatePreferredSize(this);
 			} catch (Exception e) {
-				throw new RuntimeException(e);
+				CrashReports.report(e, "Could not calculate preferred size for Component %s", this);
 			}
 		}
 
@@ -342,7 +345,8 @@ public class Component extends Named {
 	}
 
 	private Component getNextFocusCandidate(boolean canUseChildren) {
-		if (canUseChildren) synchronized (getChildren()) {
+		if (canUseChildren)
+			synchronized (getChildren()) {
 				if (!getChildren().isEmpty()) {
 					return getChild(0);
 				}
@@ -458,20 +462,19 @@ public class Component extends Named {
 	}
 
 	public void removeListener(Object listener) {
-		if (eventBus == null) return;
+		if (eventBus == null)
+			return;
 		eventBus.unregister(listener);
 	}
 
 	public void dispatchEvent(Object event) {
-		if (eventBus == null) return;
+		if (eventBus == null)
+			return;
 		eventBus.post(event);
 	}
 
-	public <T extends InputEvent> void addListener(
+	public <T extends InputEvent> void addListener(Class<? extends T> type, boolean handlesConsumed,
-			Class<? extends T> type,
+			InputListener<T> listener) {
-			boolean handlesConsumed,
-			InputListener<T> listener
-	) {
 		if (inputBus == null) {
 			inputBus = new InputBus();
 		}
@@ -479,10 +482,7 @@ public class Component extends Named {
 		inputBus.register(type, handlesConsumed, listener);
 	}
 
-	public <T extends InputEvent> void addListener(
+	public <T extends InputEvent> void addListener(Class<? extends T> type, InputListener<T> listener) {
-			Class<? extends T> type,
-			InputListener<T> listener
-	) {
 		if (inputBus == null) {
 			inputBus = new InputBus();
 		}
@@ -517,15 +517,17 @@ public class Component extends Named {
 					break;
 			}
 		} catch (Exception e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not dispatch input to Component %s", this);
 		}
 	}
 
 	private void dispatchInputToFocused(Input input) {
 		Component c = findFocused();
 
-		if (c == null) return;
+		if (c == null)
-		if (attemptFocusTransfer(input, c)) return;
+			return;
+		if (attemptFocusTransfer(input, c))
+			return;
 
 		while (c != null) {
 			c.handleInput(input);
@@ -555,8 +557,10 @@ public class Component extends Named {
 	}
 
 	private boolean attemptFocusTransfer(Input input, Component focused) {
-		if (input.isConsumed()) return false;
+		if (input.isConsumed())
-		if (!(input.getEvent() instanceof KeyEvent)) return false;
+			return false;
+		if (!(input.getEvent() instanceof KeyEvent))
+			return false;
 
 		KeyEvent keyInput = (KeyEvent) input.getEvent();
 
@@ -574,16 +578,11 @@ public class Component extends Named {
 	}
 
 	public synchronized boolean contains(int x, int y) {
-		return
+		return x >= getX() && x < getX() + getWidth() && y >= getY() && y < getY() + getHeight();
-				x >= getX() && x < getX() + getWidth() &&
-				y >= getY() && y < getY() + getHeight();
 	}
 
 	public boolean containsCursor() {
-		return contains(
+		return contains((int) InputTracker.getCursorX(), (int) InputTracker.getCursorY());
-				(int) InputTracker.getCursorX(),
-				(int) InputTracker.getCursorY()
-		);
 	}
 
 	public void requestReassembly() {
@@ -610,7 +609,7 @@ public class Component extends Named {
 		try {
 			assembleSelf(target);
 		} catch (Exception e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not assemble Component %s", this);
 		}
 
 		assembleChildren(target);
@@ -618,7 +617,7 @@ public class Component extends Named {
 		try {
 			postAssembleSelf(target);
 		} catch (Exception e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Post-assembly failed for Component %s", this);
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/gui/LayerTestGUI.java

@@ -1,125 +0,0 @@
-/*******************************************************************************
- * Progressia
- * Copyright (C) 2020  Wind Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *******************************************************************************/
-package ru.windcorp.progressia.client.graphics.gui;
-
-import com.google.common.eventbus.Subscribe;
-import glm.vec._2.i.Vec2i;
-import org.lwjgl.glfw.GLFW;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.font.Font;
-import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
-import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
-import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
-import ru.windcorp.progressia.client.localization.Localizer;
-import ru.windcorp.progressia.client.localization.MutableString;
-import ru.windcorp.progressia.client.localization.MutableStringLocalized;
-
-public class LayerTestGUI extends GUILayer {
-	
-	private static class DebugComponent extends Component {
-		private final int color;
-		
-		public DebugComponent(String name, Vec2i size, int color) {
-			super(name);
-			this.color = color;
-			
-			setPreferredSize(size);
-			
-			addListener(new Object() {
-				@Subscribe
-				public void onHoverChanged(HoverEvent e) {
-					requestReassembly();
-				}
-			});
-			
-			addListener(KeyEvent.class, this::onClicked);
-		}
-		
-		private boolean onClicked(KeyEvent event) {
-			if (!event.isMouse()) {
-				return false;
-			} else if (event.isPress() && event.isLeftMouseButton()) {
-				System.out.println("You pressed a Component!");
-			}
-			return true;
-		}
-		
-		@Override
-		protected void assembleSelf(RenderTarget target) {
-			target.fill(getX(), getY(), getWidth(), getHeight(), Colors.BLACK);
-			
-			target.fill(
-					getX() + 2, getY() + 2,
-					getWidth() - 4, getHeight() - 4,
-					isHovered() ? Colors.DEBUG_YELLOW : color
-			);
-		}
-	}
-
-	public LayerTestGUI() {
-		super("LayerTestGui", new LayoutAlign(1, 0.75, 5));
-		
-		Panel panel = new Panel("Alex", new LayoutVertical(5));
-		
-		panel.addChild(new DebugComponent("Bravo", new Vec2i(200, 100), 0x44FF44));
-		
-		Component charlie = new DebugComponent("Charlie", null, 0x222222);
-		charlie.setLayout(new LayoutVertical(5));
-
-		//Debug
-		Localizer.getInstance().setLanguage("ru-RU");
-		MutableString epsilon = new MutableStringLocalized("Epsilon")
-				.addListener(() -> ((Label)charlie.getChild(0)).update()).format(34, "thirty-four");
-		// These two are swapped in code due to a bug in layouts, fixing ATM
-		charlie.addChild(
-				new Label(
-						"Delta",
-						new Font().withColor(0xCCBB44).deriveShadow().deriveBold(),
-						"Пре-альфа!"
-				)
-		);
-		charlie.addChild(
-				new Label(
-						"Epsilon",
-						new Font().withColor(0x4444BB).deriveItalic(),
-						() -> epsilon.get().concat("\u269b")
-				)
-		);
-		panel.addChild(charlie);
-
-
-		charlie.addListener(KeyEvent.class, e -> {
-			if(e.isPress() && e.getKey() == GLFW.GLFW_KEY_L) {
-				Localizer localizer = Localizer.getInstance();
-				if (localizer.getLanguage().equals("ru-RU")) {
-					localizer.setLanguage("en-US");
-				} else {
-					localizer.setLanguage("ru-RU");
-				}
-				return true;
-			} return false;
-		});
-		charlie.setFocusable(true);
-		charlie.takeFocus();
-
-		getRoot().addChild(panel);
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/graphics/input/KeyMatcher.java

@@ -17,46 +17,24 @@
  *******************************************************************************/
 package ru.windcorp.progressia.client.graphics.input;
 
-import gnu.trove.set.TIntSet;
+import java.util.function.Predicate;
-import ru.windcorp.progressia.client.graphics.backend.InputTracker;
+
+import org.lwjgl.glfw.GLFW;
 
 public class KeyMatcher {
 
 	private final int key;
-	private final int[] additionalKeys;
 	private final int mods;
 	
-	public KeyMatcher(int key, int[] additionalKeys, int mods) {
+	protected KeyMatcher(int key, int mods) {
 		this.key = key;
-		this.additionalKeys = additionalKeys;
 		this.mods = mods;
 	}
 
-	public KeyMatcher(KeyEvent template, int... additionalKeys) {
-		this(template.getKey(), additionalKeys, template.getMods());
-	}
-	
-	public static KeyMatcher createKeyMatcher(KeyEvent template) {
-		return new KeyMatcher(
-				template,
-				InputTracker.getPressedKeys().toArray()
-		);
-	}
-
 	public boolean matches(KeyEvent event) {
 		if (!event.isPress()) return false;
 		if (event.getKey() != getKey()) return false;
-		if (event.getMods() != getMods()) return false;
+		if ((event.getMods() & getMods()) != getMods()) return false;
-		
-		TIntSet pressedKeys = InputTracker.getPressedKeys();
-		
-		if (pressedKeys.size() != additionalKeys.length) return false;
-		
-		for (int additionalKey : additionalKeys) {
-			if (!pressedKeys.contains(additionalKey)) {
-				return false;
-			}
-		}
 		
 		return true;
 	}
@@ -65,12 +43,52 @@ public class KeyMatcher {
 		return key;
 	}
 	
-	public int[] getAdditionalKeys() {
-		return additionalKeys;
-	}
-	
 	public int getMods() {
 		return mods;
 	}
 	
+	public static KeyMatcher.Builder of(int key) {
+		return new KeyMatcher.Builder(key);
+	}
+	
+	public static class Builder {
+		
+		private final int key;
+		private int mods = 0;
+		
+		public Builder(int key) {
+			this.key = key;
+		}
+		
+		public Builder with(int modifier) {
+			this.mods += modifier;
+			return this;
+		}
+		
+		public Builder withShift() {
+			return with(GLFW.GLFW_MOD_SHIFT);
+		}
+		
+		public Builder withCtrl() {
+			return with(GLFW.GLFW_MOD_CONTROL);
+		}
+		
+		public Builder withAlt() {
+			return with(GLFW.GLFW_MOD_ALT);
+		}
+		
+		public Builder withSuper() {
+			return with(GLFW.GLFW_MOD_SUPER);
+		}
+		
+		public KeyMatcher build() {
+			return new KeyMatcher(key, mods);
+		}
+		
+		public Predicate<KeyEvent> matcher() {
+			return build()::matches;
+		}
+		
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/graphics/input/Keys.java

@@ -31,26 +31,23 @@ import gnu.trove.map.hash.TIntObjectHashMap;
 import gnu.trove.map.hash.TObjectIntHashMap;
 import gnu.trove.set.TIntSet;
 import gnu.trove.set.hash.TIntHashSet;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Keys {
 
-	private static final TIntObjectMap<String> CODES_TO_NAMES =
+	private static final TIntObjectMap<String> CODES_TO_NAMES = new TIntObjectHashMap<>();
-			new TIntObjectHashMap<>();
 
-	private static final TObjectIntMap<String> NAMES_TO_CODES =
+	private static final TObjectIntMap<String> NAMES_TO_CODES = new TObjectIntHashMap<>();
-			new TObjectIntHashMap<>();
 
 	private static final TIntSet MOUSE_BUTTONS = new TIntHashSet();
 
 	private static final String KEY_PREFIX = "GLFW_KEY_";
 	private static final String MOUSE_BUTTON_PREFIX = "GLFW_MOUSE_BUTTON_";
 
-	private static final Set<String> IGNORE_FIELDS =
+	private static final Set<String> IGNORE_FIELDS = new HashSet<>(
-			new HashSet<>(Arrays.asList(
+			Arrays.asList("GLFW_KEY_UNKNOWN", "GLFW_KEY_LAST", "GLFW_MOUSE_BUTTON_LAST", "GLFW_MOUSE_BUTTON_1", // Alias
-					"GLFW_KEY_UNKNOWN",
+																												// for
-					"GLFW_KEY_LAST",
+																												// LEFT
-					"GLFW_MOUSE_BUTTON_LAST",
-					"GLFW_MOUSE_BUTTON_1", // Alias for LEFT
 					"GLFW_MOUSE_BUTTON_2", // Alias for RIGHT
 					"GLFW_MOUSE_BUTTON_3" // Alias for MIDDLE
 			));
@@ -63,28 +60,28 @@ public class Keys {
 		try {
 
 			for (Field field : GLFW.class.getFields()) {
-				if (!Modifier.isStatic(field.getModifiers())) continue;
+				if (!Modifier.isStatic(field.getModifiers()))
-				if (!Modifier.isFinal(field.getModifiers())) continue;
+					continue;
+				if (!Modifier.isFinal(field.getModifiers()))
+					continue;
 
 				String name = field.getName();
 
-				if (
+				if (!name.startsWith(KEY_PREFIX) && !name.startsWith(MOUSE_BUTTON_PREFIX))
-						!name.startsWith(KEY_PREFIX) &&
+					continue;
-						!name.startsWith(MOUSE_BUTTON_PREFIX)
-				) continue;
 
-				if (IGNORE_FIELDS.contains(name)) continue;
+				if (IGNORE_FIELDS.contains(name))
+					continue;
 
 				addToDictionary(field);
 			}
 
 		} catch (IllegalAccessException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Cannot access GLFW constants");
 		}
 	}
 
-	private static void addToDictionary(Field field)
+	private static void addToDictionary(Field field) throws IllegalAccessException {
-			throws IllegalAccessException {
 
 		int value = field.getInt(null);
 		String name = field.getName();
@@ -97,11 +94,8 @@ public class Keys {
 		}
 
 		if (CODES_TO_NAMES.containsKey(value)) {
-			throw new RuntimeException(
+			CrashReports.report(null, "Duplicate keys: %s and %s both map to %d(0x%s)",
-					"Duplicate keys: " + CODES_TO_NAMES.get(value) +
+					CODES_TO_NAMES.get(value), name, value, Integer.toHexString(value));
-					" and " + name + " both map to " + value +
-					"(0x" + Integer.toHexString(value) + ")"
-			);
 		}
 
 		CODES_TO_NAMES.put(value, name);
@@ -125,8 +119,7 @@ public class Keys {
 			name = "KEYPAD_" + name.substring("KP_".length());
 		}
 
-		name = Character.toTitleCase(name.charAt(0)) +
+		name = Character.toTitleCase(name.charAt(0)) + name.substring(1).toLowerCase();
-				name.substring(1).toLowerCase();
 
 		name = name.replace('_', ' ');
 

src/main/java/ru/windcorp/progressia/client/graphics/model/LambdaModel.java

@@ -122,4 +122,13 @@ public class LambdaModel extends DynamicModel {
 		
 	}
 	
+	public static LambdaModel animate(Renderable model, TransformGetter transform) {
+		return new LambdaModel(
+				new Renderable[]      { model },
+				new Mat4[]            { new Mat4() },
+				new boolean[]         { true },
+				new TransformGetter[] { transform }
+		);
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/graphics/texture/Atlases.java

@@ -13,6 +13,7 @@ import ru.windcorp.progressia.client.graphics.backend.RenderTaskQueue;
 import ru.windcorp.progressia.common.resource.Resource;
 import ru.windcorp.progressia.common.util.BinUtil;
 import ru.windcorp.progressia.common.util.Named;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Atlases {
 
@@ -24,10 +25,7 @@ public class Atlases {
 			this.atlasSize = atlasSize;
 
 			if (!BinUtil.isPowerOf2(atlasSize)) {
-				throw new IllegalArgumentException(
+				throw new IllegalArgumentException("Atlas size " + atlasSize + " is not a power of 2");
-						"Atlas size " + atlasSize
-						+ " is not a power of 2"
-				);
 			}
 		}
 
@@ -71,11 +69,8 @@ public class Atlases {
 
 			editor.draw(data, nextX, nextY);
 
-			Sprite result = new Sprite(
+			Sprite result = new Sprite(getPrimitive(), toPrimitiveCoords(nextX, nextY),
-					getPrimitive(),
+					toPrimitiveCoords(width, height));
-					toPrimitiveCoords(nextX, nextY),
-					toPrimitiveCoords(width, height)
-			);
 
 			nextX += width;
 
@@ -99,10 +94,7 @@ public class Atlases {
 		}
 
 		private Vec2 toPrimitiveCoords(int x, int y) {
-			return new Vec2(
+			return new Vec2(toPrimitiveCoord(x), toPrimitiveCoord(y));
-					toPrimitiveCoord(x),
-					toPrimitiveCoord(y)
-			);
 		}
 
 		private float toPrimitiveCoord(int c) {
@@ -152,10 +144,8 @@ public class Atlases {
 
 	private static final TextureSettings SETTINGS = new TextureSettings(false);
 
-	private static final Map<Resource, Sprite> LOADED =
+	private static final Map<Resource, Sprite> LOADED = new HashMap<>();
-			new HashMap<>();
+	private static final Multimap<AtlasGroup, Atlas> ATLASES = MultimapBuilder.hashKeys().arrayListValues().build();
-	private static final Multimap<AtlasGroup, Atlas> ATLASES =
-			MultimapBuilder.hashKeys().arrayListValues().build();
 
 	public static Sprite getSprite(Resource resource, AtlasGroup group) {
 		return LOADED.computeIfAbsent(resource, k -> loadSprite(k, group));
@@ -163,12 +153,12 @@ public class Atlases {
 
 	private static Sprite loadSprite(Resource resource, AtlasGroup group) {
 		try {
-			TextureDataEditor data =
+			TextureDataEditor data = TextureLoader.loadPixels(resource, SETTINGS);
-					TextureLoader.loadPixels(resource, SETTINGS);
 
 			return loadSprite(data.getData(), group);
 		} catch (IOException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not load sprite %s into atlas group %s", resource, group);
+			return null;
 		}
 	}
 
@@ -180,14 +170,11 @@ public class Atlases {
 	private static Atlas getReadyAtlas(AtlasGroup group, TextureData data) {
 		List<Atlas> atlases = (List<Atlas>) ATLASES.get(group);
 
-		if (
+		if (atlases.isEmpty() || !(atlases.get(atlases.size() - 1).canAddSprite(data))) {
-				atlases.isEmpty() ||
-				!(atlases.get(atlases.size() - 1).canAddSprite(data))
-		) {
 			Atlas newAtlas = new Atlas(group);
 
 			if (!newAtlas.canAddSprite(data)) {
-				throw new RuntimeException("Could not fit tex into atlas of size " + newAtlas.getSize());
+				CrashReports.report(null, "Could not fit texture into atlas of size %d", newAtlas.getSize());
 			}
 
 			atlases.add(newAtlas);
@@ -202,6 +189,7 @@ public class Atlases {
 		});
 	}
 
-	private Atlases() {}
+	private Atlases() {
+	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/texture/ComplexTexture.java

@@ -19,10 +19,10 @@ public class ComplexTexture {
 		this.primitive = primitive;
 		
 		this.assumedWidth = abstractWidth
-				* primitive.getWidth() / (float) primitive.getBufferWidth();
+				/ (float) primitive.getWidth() * primitive.getBufferWidth();
 		
 		this.assumedHeight = abstractHeight
-				* primitive.getHeight() / (float) primitive.getBufferHeight();
+				/ (float) primitive.getHeight() * primitive.getBufferHeight();
 	}
 	
 	public Texture get(int x, int y, int width, int height) {

src/main/java/ru/windcorp/progressia/client/graphics/texture/SimpleTextures.java

@@ -6,6 +6,7 @@ import java.util.Map;
 
 import ru.windcorp.progressia.common.resource.Resource;
 import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class SimpleTextures {
 
@@ -30,7 +31,8 @@ public class SimpleTextures {
 					new Sprite(new TexturePrimitive(data.getData()))
 			);
 		} catch (IOException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not load texture %s", resource);
+			return null;
 		}
 
 	}

src/main/java/ru/windcorp/progressia/client/graphics/texture/TexturePrimitive.java

@@ -24,6 +24,7 @@ import java.util.Arrays;
 
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker;
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker.OpenGLDeletable;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class TexturePrimitive implements OpenGLDeletable {
 
@@ -89,7 +90,7 @@ public class TexturePrimitive implements OpenGLDeletable {
 		OpenGLObjectTracker.register(this);
 
 		if (handle < 0) {
-			throw new RuntimeException("oops");
+			CrashReports.report(null, "Failed to allocate texture");
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/graphics/world/Camera.java

@@ -272,6 +272,10 @@ public class Camera {
 		}
 	}
 	
+	public int getCurrentModeIndex() {
+		return currentModeIndex;
+	}
+
 	public float getLastAnchorYaw() {
 		return lastAnchorYaw;
 	}

src/main/java/ru/windcorp/progressia/client/graphics/world/LayerWorld.java

@@ -20,45 +20,36 @@ package ru.windcorp.progressia.client.graphics.world;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.lwjgl.glfw.GLFW;
+import glm.mat._4.Mat4;
-
-import glm.Glm;
-import glm.mat._3.Mat3;
-import glm.vec._2.Vec2;
 import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
 import ru.windcorp.progressia.client.Client;
+import ru.windcorp.progressia.client.ClientState;
 import ru.windcorp.progressia.client.comms.controls.InputBasedControls;
 import ru.windcorp.progressia.client.graphics.Layer;
 import ru.windcorp.progressia.client.graphics.backend.FaceCulling;
-import ru.windcorp.progressia.client.graphics.backend.GraphicsBackend;
 import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
-import ru.windcorp.progressia.client.graphics.input.CursorMoveEvent;
-import ru.windcorp.progressia.client.graphics.input.InputEvent;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
 import ru.windcorp.progressia.client.graphics.input.bus.Input;
-import ru.windcorp.progressia.common.collision.AABB;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderProgram;
+import ru.windcorp.progressia.client.graphics.model.Shapes.PppBuilder;
+import ru.windcorp.progressia.client.graphics.model.StaticModel;
+import ru.windcorp.progressia.client.graphics.texture.Texture;
+import ru.windcorp.progressia.common.Units;
 import ru.windcorp.progressia.common.collision.Collideable;
-import ru.windcorp.progressia.common.collision.CollisionClock;
-import ru.windcorp.progressia.common.collision.CollisionModel;
-import ru.windcorp.progressia.common.collision.CompoundCollisionModel;
 import ru.windcorp.progressia.common.collision.colliders.Collider;
 import ru.windcorp.progressia.common.util.FloatMathUtils;
-import ru.windcorp.progressia.common.util.Vectors;
 import ru.windcorp.progressia.common.world.entity.EntityData;
-import ru.windcorp.progressia.test.AABBRenderer;
+import ru.windcorp.progressia.test.CollisionModelRenderer;
+import ru.windcorp.progressia.test.TestPlayerControls;
 
 public class LayerWorld extends Layer {
 	
-	private final Mat3 angMat = new Mat3();
-
-	private int movementForward = 0;
-	private int movementRight = 0;
-	private int movementUp = 0;
-	
 	private final WorldRenderHelper helper = new WorldRenderHelper();
 	
 	private final Client client;
 	private final InputBasedControls inputBasedControls;
+	private final TestPlayerControls tmp_testControls = TestPlayerControls.getInstance();
 
 	public LayerWorld(Client client) {
 		super("World");
@@ -79,38 +70,14 @@ public class LayerWorld extends Layer {
 	
 	@Override
 	protected void doRender() {
-		if (client.getLocalPlayer() != null) {
-			tmp_handleControls();
-		}
-		
 		Camera camera = client.getCamera();
 		if (camera.hasAnchor()) {
 			renderWorld();
 		}
+		
+		if (client.getLocalPlayer() != null) {
+			client.getLocalPlayer().update(client.getWorld());
 		}
-
-	private void tmp_handleControls() {
-		EntityData player = client.getLocalPlayer();
-		
-		angMat.identity().rotateZ(player.getYaw());
-		
-		Vec3 movement = Vectors.grab3();
-		
-		// Horizontal and vertical max control speed
-		final float movementSpeed = 0.1f * 60.0f;
-		// (0; 1], 1 is instant change, 0 is no control authority
-		final float controlAuthority = 0.1f;
-		
-		movement.set(movementForward, -movementRight, 0);
-		if (movementForward != 0 && movementRight != 0) movement.normalize();
-		angMat.mul_(movement); // bug in jglm, .mul() and mul_() are swapped
-		movement.z = movementUp;
-		movement.mul(movementSpeed);
-		movement.sub(player.getVelocity());
-		movement.mul(controlAuthority);
-		player.getVelocity().add(movement);
-		
-		Vectors.release(movement);
 	}
 
 	private void renderWorld() {
@@ -128,150 +95,117 @@ public class LayerWorld extends Layer {
 	private final Collider.ColliderWorkspace tmp_colliderWorkspace = new Collider.ColliderWorkspace();
 	private final List<Collideable> tmp_collideableList = new ArrayList<>();
 	
-	private static final boolean RENDER_AABBS = true;
+	private static final boolean RENDER_COLLISION_MODELS = false;
 	
 	private void tmp_doEveryFrame() {
+		float tickLength = (float) GraphicsInterface.getFrameLength();
+		
 		try {
-			if (RENDER_AABBS) {
+			tmp_performCollisions(tickLength);
+			tmp_drawSelectionBox();
+			
+			tmp_testControls.applyPlayerControls();
+			
 			for (EntityData data : this.client.getWorld().getData().getEntities()) {
-					CollisionModel model = data.getCollisionModel();
+				tmp_applyFriction(data);
-					if (model instanceof AABB) {
+				tmp_applyGravity(data, tickLength);
-						AABBRenderer.renderAABB((AABB) model, helper);
+				tmp_renderCollisionModel(data);
-					} else if (model instanceof CompoundCollisionModel) {
-						AABBRenderer.renderAABBsInCompound((CompoundCollisionModel) model, helper);
 			}
+		} catch (Throwable e) {
+			e.printStackTrace();
+			System.err.println("OLEGSHA is to blame. Tell him he vry stupiDD!!");
+			System.exit(31337);
 		}
 	}
 
+	private void tmp_renderCollisionModel(EntityData entity) {
+		if (RENDER_COLLISION_MODELS) {
+			CollisionModelRenderer.renderCollisionModel(entity.getCollisionModel(), helper);
+		}
+	}
+
+	private void tmp_performCollisions(float tickLength) {
 		tmp_collideableList.clear();
 		tmp_collideableList.addAll(this.client.getWorld().getData().getEntities());
 		
 		Collider.performCollisions(
 				tmp_collideableList,
-					new CollisionClock() {
+				this.client.getWorld().getData(),
-						private float t = 0;
+				tickLength,
-						@Override
-						public float getTime() {
-							return t;
-						}
-						
-						@Override
-						public void advanceTime(float change) {
-							t += change;
-						}
-					},
-					(float) GraphicsInterface.getFrameLength(),
 				tmp_colliderWorkspace
 		);
-			
-			final float frictionCoeff = 1 - 1e-2f;
-			
-			for (EntityData data : this.client.getWorld().getData().getEntities()) {
-				data.getVelocity().mul(frictionCoeff);
 	}
-		} catch (Exception e) {
+	
-			System.exit(31337);
+	private static final Renderable SELECTION_BOX = tmp_createSelectionBox();
+
+	private void tmp_drawSelectionBox() {
+		LocalPlayer player = client.getLocalPlayer();
+		if (player == null) return;
+		
+		Vec3i selection = player.getSelection().getBlock();
+		if (selection == null) return;
+		
+		helper.pushTransform().translate(selection.x, selection.y, selection.z);
+		SELECTION_BOX.render(helper);
+		helper.popTransform();
 	}
+
+	private static Renderable tmp_createSelectionBox() {
+		StaticModel.Builder b = StaticModel.builder();
+		ShapeRenderProgram p = WorldRenderProgram.getDefault();
+		
+		final float f = 1e-2f;
+		final float scale = 1 - f/2;
+		final Vec3 color = new Vec3(1, 1, 1).mul(0);
+		
+		for (float phi = 0; phi < 2*FloatMathUtils.PI_F; phi += FloatMathUtils.PI_F/2) {
+			Mat4 rot = new Mat4().identity().rotateZ(phi).scale(scale);
+			
+			b.addPart(new PppBuilder(p, (Texture) null).setOrigin(
+					new Vec3(-f - 0.5f, -f - 0.5f, -f - 0.5f)
+			).setSize(f, f, 2*f + 1).setColorMultiplier(color).create(), rot);
+			
+			b.addPart(new PppBuilder(p, (Texture) null).setOrigin(
+					new Vec3(-f - 0.5f, - 0.5f, -f - 0.5f)
+			).setSize(f, 1, f).setColorMultiplier(color).create(), rot);
+			
+			b.addPart(new PppBuilder(p, (Texture) null).setOrigin(
+					new Vec3(-f - 0.5f, - 0.5f, + 0.5f)
+			).setSize(f, 1, f).setColorMultiplier(color).create(), rot);
+		}
+		
+		return new StaticModel(b);
+	}
+
+	private void tmp_applyFriction(EntityData entity) {
+		final float frictionCoeff = 1 - 1e-5f;
+		entity.getVelocity().mul(frictionCoeff);
+	}
+	
+	private void tmp_applyGravity(EntityData entity, float tickLength) {
+		if (ClientState.getInstance().getLocalPlayer().getEntity() == entity && tmp_testControls.isFlying()) {
+			return;
+		}
+		
+		final float gravitationalAcceleration;
+		
+		if (tmp_testControls.useMinecraftGravity()) {
+			gravitationalAcceleration = 32f * Units.METERS_PER_SECOND_SQUARED; // plz dont sue me M$
+		} else {
+			gravitationalAcceleration = 9.81f * Units.METERS_PER_SECOND_SQUARED;
+		}
+		entity.getVelocity().add(0, 0, -gravitationalAcceleration * tickLength);
 	}
 
 	@Override
 	protected void handleInput(Input input) {
 		if (input.isConsumed()) return;
 		
-		InputEvent event = input.getEvent();
+		tmp_testControls.handleInput(input);
-		
-		if (event instanceof KeyEvent) {
-			if (onKeyEvent((KeyEvent) event)) {
-				input.consume();
-			}
-		} else if (event instanceof CursorMoveEvent) {
-			onMouseMoved((CursorMoveEvent) event);
-			input.consume();
-		}
 		
 		if (!input.isConsumed()) {
 			inputBasedControls.handleInput(input);
 		}
 	}
 
-	private boolean flag = true;
-	
-	private boolean onKeyEvent(KeyEvent event) {
-		if (event.isRepeat()) return false;
-		
-		int multiplier = event.isPress() ? 1 : -1;
-		
-		switch (event.getKey()) {
-		case GLFW.GLFW_KEY_W:
-			movementForward += +1 * multiplier;
-			break;
-		case GLFW.GLFW_KEY_S:
-			movementForward += -1 * multiplier;
-			break;
-		case GLFW.GLFW_KEY_A:
-			movementRight += -1 * multiplier;
-			break;
-		case GLFW.GLFW_KEY_D:
-			movementRight += +1 * multiplier;
-			break;
-		case GLFW.GLFW_KEY_SPACE:
-			movementUp += +1 * multiplier;
-			break;
-		case GLFW.GLFW_KEY_LEFT_SHIFT:
-			movementUp += -1 * multiplier;
-			break;
-			
-		case GLFW.GLFW_KEY_ESCAPE:
-			if (!event.isPress()) return false;
-			
-			if (flag) {
-				GLFW.glfwSetInputMode(GraphicsBackend.getWindowHandle(), GLFW.GLFW_CURSOR, GLFW.GLFW_CURSOR_NORMAL);
-			} else {
-				GLFW.glfwSetInputMode(GraphicsBackend.getWindowHandle(), GLFW.GLFW_CURSOR, GLFW.GLFW_CURSOR_DISABLED);
-			}
-			
-			flag = !flag;
-			break;
-			
-		case GLFW.GLFW_KEY_F5:
-			if (!event.isPress()) return false;
-			
-			if (client.getCamera().hasAnchor()) {
-				client.getCamera().selectNextMode();
-			}
-			break;
-			
-		default:
-			return false;
-		}
-		
-		return true;
-	}
-	
-	private void onMouseMoved(CursorMoveEvent event) {
-		if (!flag) return;
-		
-		final float yawScale = -0.002f;
-		final float pitchScale = yawScale;
-
-		EntityData player = client.getLocalPlayer();
-		
-		if (player != null) {
-			normalizeAngles(player.getDirection().add(
-					(float) (event.getChangeX() * yawScale),
-					(float) (event.getChangeY() * pitchScale)
-			));
-		}
-	}
-
-	private void normalizeAngles(Vec2 dir) {
-		// Normalize yaw
-		dir.x = FloatMathUtils.normalizeAngle(dir.x);
-		
-		// Clamp pitch
-		dir.y = Glm.clamp(
-				dir.y, -FloatMathUtils.PI_F/2, +FloatMathUtils.PI_F/2
-		);
-	}
-
 }

src/main/java/ru/windcorp/progressia/client/graphics/world/LocalPlayer.java

@@ -0,0 +1,28 @@
+package ru.windcorp.progressia.client.graphics.world;
+
+import ru.windcorp.progressia.client.world.WorldRender;
+import ru.windcorp.progressia.client.world.entity.EntityRenderable;
+import ru.windcorp.progressia.common.world.Player;
+import ru.windcorp.progressia.common.world.entity.EntityData;
+
+public class LocalPlayer extends Player {
+
+	private final Selection selection = new Selection();
+	
+	public LocalPlayer(EntityData entity) {
+		super(entity);
+	}
+	
+	public Selection getSelection() {
+		return selection;
+	}
+	
+	public void update(WorldRender world) {
+		getSelection().update(world, getEntity());
+	}
+
+	public EntityRenderable getRenderable(WorldRender world) {
+		return world.getEntityRenderable(getEntity());
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/world/Selection.java

@@ -0,0 +1,72 @@
+package ru.windcorp.progressia.client.graphics.world;
+
+import glm.vec._2.Vec2;
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.world.WorldRender;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.BlockRay;
+import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.entity.EntityData;
+
+public class Selection {
+	
+	private final Vec3i block = new Vec3i();
+	private BlockFace surface = null;
+	private final Vec2 pointOnSurface = new Vec2(0.5f, 0.5f);
+	private final Vec3 point = new Vec3();
+	
+	private boolean exists = false;
+	
+	private BlockRay ray = new BlockRay();
+	
+	public void update(WorldRender world, EntityData player) {
+		Vec3 direction = Vectors.grab3();
+		Vec3 start = Vectors.grab3();
+		
+		player.getLookingAtVector(direction);
+		world.getEntityRenderable(player).getViewPoint(start);
+		start.add(player.getPosition());
+		
+		exists = false;
+		
+		for (ray.start(start, direction); ray.getDistance() < 6; ray.next()) {
+			Vec3i blockInWorld = ray.current();
+			
+			if (world.getData().getCollisionModelOfBlock(blockInWorld) != null) {
+				exists = true;
+				block.set(blockInWorld.x, blockInWorld.y, blockInWorld.z);
+				ray.getPoint(point);
+				surface = ray.getCurrentFace();
+				// TODO selectedPointOnSurface
+				break;
+			}
+		}
+		
+		ray.end();
+		
+		Vectors.release(direction);
+		Vectors.release(start);
+	}
+	
+	public Vec3i getBlock() {
+		return exists ? block : null;
+	}
+	
+	public Vec3 getPoint() {
+		return exists ? point : null;
+	}
+	
+	public BlockFace getSurface() {
+		return exists ? surface : null;
+	}
+	
+	public Vec2 getPointOnSurface() {
+		return exists ? pointOnSurface : null;
+	}
+	
+	public boolean exists() {
+		return exists;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/localization/Localizer.java

@@ -3,6 +3,8 @@ package ru.windcorp.progressia.client.localization;
 import java.lang.ref.WeakReference;
 import java.util.*;
 
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+
 public class Localizer {
 	private static final Localizer INSTANCE = new Localizer("assets/languages/", "en-US");
 
@@ -41,7 +43,7 @@ public class Localizer {
 			data = new Parser(langFolder + this.language + ".lang").parse();
 			pokeListeners(language);
 		} else {
-			throw new RuntimeException("Language not found: " + language);
+			CrashReports.report(null, "Language not found: %s", language);
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/localization/Parser.java

@@ -3,6 +3,7 @@ package ru.windcorp.progressia.client.localization;
 import ru.windcorp.jputil.chars.EscapeException;
 import ru.windcorp.jputil.chars.Escaper;
 import ru.windcorp.progressia.common.resource.ResourceManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 import java.io.IOException;
 import java.io.Reader;
@@ -80,7 +81,8 @@ public class Parser {
 			}
 
 		} catch (IOException | EscapeException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not parse language file %s", filePath);
+			return null;
 		}
 		return parsedData;
 	}

src/main/java/ru/windcorp/progressia/client/world/ChunkUpdateListener.java

@@ -0,0 +1,19 @@
+package ru.windcorp.progressia.client.world;
+
+import ru.windcorp.progressia.common.world.ChunkData;
+import ru.windcorp.progressia.common.world.ChunkDataListener;
+
+class ChunkUpdateListener implements ChunkDataListener {
+	
+	private final WorldRender world;
+	
+	public ChunkUpdateListener(WorldRender world) {
+		this.world = world;
+	}
+
+	@Override
+	public void onChunkChanged(ChunkData chunk) {
+		world.getChunk(chunk).markForUpdate();
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/WorldRender.java

@@ -29,7 +29,9 @@ import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.client.world.entity.EntityRenderRegistry;
 import ru.windcorp.progressia.client.world.entity.EntityRenderable;
 import ru.windcorp.progressia.common.world.ChunkData;
+import ru.windcorp.progressia.common.world.ChunkDataListeners;
 import ru.windcorp.progressia.common.world.WorldData;
+import ru.windcorp.progressia.common.world.WorldDataListener;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 
 public class WorldRender {
@@ -43,9 +45,18 @@ public class WorldRender {
 	public WorldRender(WorldData data) {
 		this.data = data;
 		
-		for (ChunkData chunkData : data.getChunks()) {
+		data.addListener(ChunkDataListeners.createAdder(new ChunkUpdateListener(this)));
-			chunks.put(chunkData, new ChunkRender(this, chunkData));
+		data.addListener(new WorldDataListener() {
+			@Override
+			public void onChunkLoaded(WorldData world, ChunkData chunk) {
+				chunks.put(chunk, new ChunkRender(WorldRender.this, chunk));
 			}
+			
+			@Override
+			public void beforeChunkUnloaded(WorldData world, ChunkData chunk) {
+				chunks.remove(chunk);
+			}
+		});
 	}
 	
 	public WorldData getData() {

src/main/java/ru/windcorp/progressia/client/world/block/BlockRender.java

@@ -18,13 +18,13 @@
 package ru.windcorp.progressia.client.world.block;
 
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
-import ru.windcorp.progressia.common.util.Namespaced;
 
 public abstract class BlockRender extends Namespaced {
 	
-	public BlockRender(String namespace, String name) {
+	public BlockRender(String id) {
-		super(namespace, name);
+		super(id);
 	}
 
 	public void render(ShapeRenderHelper renderer) {

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderNone.java

@@ -22,8 +22,8 @@ import ru.windcorp.progressia.client.graphics.model.Renderable;
 
 public class BlockRenderNone extends BlockRender {
 
-	public BlockRenderNone(String namespace, String name) {
+	public BlockRenderNone(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderOpaqueCube.java

@@ -23,25 +23,22 @@ import ru.windcorp.progressia.common.world.block.BlockFace;
 public class BlockRenderOpaqueCube extends BlockRenderTexturedCube {
 
 	public BlockRenderOpaqueCube(
-			String namespace, String name,
+			String id,
 			Texture topTexture, Texture bottomTexture,
 			Texture northTexture, Texture southTexture,
 			Texture eastTexture, Texture westTexture
 	) {
 		super(
-				namespace, name,
+				id,
 				topTexture, bottomTexture,
 				northTexture, southTexture,
 				eastTexture, westTexture
 		);
 	}
 	
-	public BlockRenderOpaqueCube(
+	public BlockRenderOpaqueCube(String id, Texture texture) {
-			String namespace, String name,
-			Texture texture
-	) {
 		this(
-				namespace, name,
+				id,
 				texture, texture,
 				texture, texture,
 				texture, texture

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderRegistry.java

@@ -22,9 +22,9 @@ import ru.windcorp.progressia.client.graphics.texture.Atlases.AtlasGroup;
 import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.common.resource.ResourceManager;
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
 
-public class BlockRenderRegistry extends NamespacedRegistry<BlockRender> {
+public class BlockRenderRegistry extends NamespacedInstanceRegistry<BlockRender> {
 	
 	private static final BlockRenderRegistry INSTANCE =
 			new BlockRenderRegistry();

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderTexturedCube.java

@@ -36,12 +36,12 @@ implements OpaqueCube {
 	private final Map<BlockFace, Texture> textures = new HashMap<>();
 
 	public BlockRenderTexturedCube(
-			String namespace, String name,
+			String id,
 			Texture topTexture, Texture bottomTexture,
 			Texture northTexture, Texture southTexture,
 			Texture eastTexture, Texture westTexture
 	) {
-		super(namespace, name);
+		super(id);
 		
 		textures.put(TOP,    topTexture);
 		textures.put(BOTTOM, bottomTexture);

src/main/java/ru/windcorp/progressia/client/world/block/BlockRenderTransparentCube.java

@@ -23,25 +23,22 @@ import ru.windcorp.progressia.common.world.block.BlockFace;
 public class BlockRenderTransparentCube extends BlockRenderTexturedCube {
 
 	public BlockRenderTransparentCube(
-			String namespace, String name,
+			String id,
 			Texture topTexture, Texture bottomTexture,
 			Texture northTexture, Texture southTexture,
 			Texture eastTexture, Texture westTexture
 	) {
 		super(
-				namespace, name,
+				id,
 				topTexture, bottomTexture,
 				northTexture, southTexture,
 				eastTexture, westTexture
 		);
 	}
 	
-	public BlockRenderTransparentCube(
+	public BlockRenderTransparentCube(String id, Texture texture) {
-			String namespace, String name,
-			Texture texture
-	) {
 		this(
-				namespace, name,
+				id,
 				texture, texture,
 				texture, texture,
 				texture, texture

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizerSupplier.java

@@ -19,21 +19,21 @@ package ru.windcorp.progressia.client.world.cro;
 
 import com.google.common.base.Supplier;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 public abstract class ChunkRenderOptimizerSupplier extends Namespaced {
 
-	public ChunkRenderOptimizerSupplier(String namespace, String name) {
+	public ChunkRenderOptimizerSupplier(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	public abstract ChunkRenderOptimizer createOptimizer();
 	
 	public static ChunkRenderOptimizerSupplier of(
-			String namespace, String name,
+			String id,
 			Supplier<ChunkRenderOptimizer> supplier
 	) {
-		return new ChunkRenderOptimizerSupplier(namespace, name) {
+		return new ChunkRenderOptimizerSupplier(id) {
 			@Override
 			public ChunkRenderOptimizer createOptimizer() {
 				return supplier.get();

src/main/java/ru/windcorp/progressia/client/world/cro/ChunkRenderOptimizers.java

@@ -30,7 +30,7 @@ public class ChunkRenderOptimizers {
 	
 	static {
 		register(ChunkRenderOptimizerSupplier.of(
-				"Default", "OpaqueCube",
+				"Default:OpaqueCube",
 				ChunkRenderOptimizerCube::new
 		));
 	}

src/main/java/ru/windcorp/progressia/client/world/entity/EntityRender.java

@@ -1,12 +1,12 @@
 package ru.windcorp.progressia.client.world.entity;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 
 public abstract class EntityRender extends Namespaced {
 
-	public EntityRender(String namespace, String name) {
+	public EntityRender(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	public abstract EntityRenderable createRenderable(EntityData entity);

src/main/java/ru/windcorp/progressia/client/world/entity/EntityRenderRegistry.java

@@ -6,9 +6,10 @@ import ru.windcorp.progressia.client.graphics.texture.TextureLoader;
 import ru.windcorp.progressia.client.graphics.texture.TexturePrimitive;
 import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
 import ru.windcorp.progressia.common.resource.ResourceManager;
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
-public class EntityRenderRegistry extends NamespacedRegistry<EntityRender> {
+public class EntityRenderRegistry extends NamespacedInstanceRegistry<EntityRender> {
 	
 	private static final EntityRenderRegistry INSTANCE =
 			new EntityRenderRegistry();
@@ -28,7 +29,8 @@ public class EntityRenderRegistry extends NamespacedRegistry<EntityRender> {
 					).getData()
 			);
 		} catch (IOException e) {
-			throw new RuntimeException(e);
+			CrashReports.report(e, "Could not load entity texture %s", name);
+			return null;
 		}
 	}
 

src/main/java/ru/windcorp/progressia/client/world/entity/HumanoidModel.java

@@ -0,0 +1,116 @@
+package ru.windcorp.progressia.client.world.entity;
+
+import static java.lang.Math.*;
+import static ru.windcorp.progressia.common.util.FloatMathUtils.*;
+
+import glm.mat._4.Mat4;
+import glm.vec._3.Vec3;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.common.world.entity.EntityData;
+
+public class HumanoidModel extends NPedModel {
+	
+	protected static abstract class Limb extends BodyPart {
+		private final float animationOffset;
+		
+		public Limb(
+				Renderable renderable, Vec3 joint,
+				float animationOffset
+		) {
+			super(renderable, joint);
+			this.animationOffset = animationOffset;
+		}
+		
+		@Override
+		protected void applyTransform(Mat4 mat, NPedModel model) {
+			float phase = model.getWalkingFrequency() * model.getWalkingParameter() + animationOffset;
+			float value = sin(phase);
+			float amplitude = getSwingAmplitude((HumanoidModel) model) * model.getVelocityParameter();
+			mat.rotateY(value * amplitude);
+		}
+
+		protected abstract float getSwingAmplitude(HumanoidModel model);
+		
+	}
+	
+	public static class Leg extends Limb {
+		public Leg(
+				Renderable renderable, Vec3 joint,
+				float animationOffset
+		) {
+			super(renderable, joint, animationOffset);
+		}
+		
+		@Override
+		protected float getSwingAmplitude(HumanoidModel model) {
+			return model.walkingLegSwing;
+		}
+	}
+	
+	public static class Arm extends Limb {
+		public Arm(
+				Renderable renderable, Vec3 joint,
+				float animationOffset
+		) {
+			super(renderable, joint, animationOffset);
+		}
+		
+		@Override
+		protected float getSwingAmplitude(HumanoidModel model) {
+			return model.walkingArmSwing;
+		}
+	}
+	
+	private final Arm leftArm;
+	private final Arm rightArm;
+	private final Leg leftLeg;
+	private final Leg rightLeg;
+	
+	private float walkingLegSwing;
+	private float walkingArmSwing;
+	
+	public HumanoidModel(
+			EntityData entity,
+			
+			Body body, Head head,
+			Arm leftArm, Arm rightArm,
+			Leg leftLeg, Leg rightLeg,
+			
+			float scale
+	) {
+		super(entity, body, head, scale);
+		this.leftArm = leftArm;
+		this.rightArm = rightArm;
+		this.leftLeg = leftLeg;
+		this.rightLeg = rightLeg;
+	}
+	
+	@Override
+	protected void renderBodyParts(ShapeRenderHelper renderer) {
+		super.renderBodyParts(renderer);
+		leftArm.render(renderer, this);
+		rightArm.render(renderer, this);
+		leftLeg.render(renderer, this);
+		rightLeg.render(renderer, this);
+	}
+	
+	public float getWalkingArmSwing() {
+		return walkingArmSwing;
+	}
+	
+	public float getWalkingLegSwing() {
+		return walkingLegSwing;
+	}
+	
+	public HumanoidModel setWalkingLegSwing(float walkingLegSwing) {
+		this.walkingLegSwing = walkingLegSwing;
+		return this;
+	}
+	
+	public HumanoidModel setWalkingArmSwing(float walkingArmSwing) {
+		this.walkingArmSwing = walkingArmSwing;
+		return this;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/entity/NPedModel.java

@@ -0,0 +1,284 @@
+package ru.windcorp.progressia.client.world.entity;
+
+import static java.lang.Math.atan2;
+import static java.lang.Math.min;
+import static java.lang.Math.pow;
+import static java.lang.Math.toRadians;
+import static ru.windcorp.progressia.common.util.FloatMathUtils.normalizeAngle;
+
+import glm.Glm;
+import glm.mat._4.Mat4;
+import glm.vec._3.Vec3;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
+import ru.windcorp.progressia.client.graphics.model.Renderable;
+import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
+import ru.windcorp.progressia.common.Units;
+import ru.windcorp.progressia.common.util.Matrices;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.entity.EntityData;
+
+public abstract class NPedModel extends EntityRenderable {
+
+	protected static abstract class BodyPart {
+			private final Renderable renderable;
+			private final Vec3 translation = new Vec3();
+	
+			public BodyPart(Renderable renderable, Vec3 joint) {
+				this.renderable = renderable;
+				if (joint != null) {
+					this.translation.set(joint);
+				}
+			}
+			
+			
+			protected void render(
+					ShapeRenderHelper renderer, NPedModel model
+			) {
+				renderer.pushTransform().translate(translation);
+				applyTransform(renderer.pushTransform(), model);
+				renderable.render(renderer);
+				renderer.popTransform();
+				renderer.popTransform();
+			}
+	
+			protected abstract void applyTransform(Mat4 mat, NPedModel model);
+			
+			public Vec3 getTranslation() {
+				return translation;
+			}
+		}
+
+	public static class Body extends BodyPart {
+		public Body(Renderable renderable) {
+			super(renderable, null);
+		}
+		
+		@Override
+		protected void applyTransform(Mat4 mat, NPedModel model) {
+			// Do nothing
+		}
+	}
+
+	public static class Head extends BodyPart {
+		private final float maxYaw;
+		private final float maxPitch;
+		
+		private final Vec3 viewPoint;
+		
+		public Head(
+				Renderable renderable, Vec3 joint,
+				double maxYawDegrees, double maxPitchDegrees,
+				Vec3 viewPoint
+		) {
+			super(renderable, joint);
+			this.maxYaw = (float) toRadians(maxYawDegrees);
+			this.maxPitch = (float) toRadians(maxPitchDegrees);
+			this.viewPoint = viewPoint;
+		}
+		
+		@Override
+		protected void applyTransform(Mat4 mat, NPedModel model) {
+			mat.rotateZ(model.getHeadYaw()).rotateY(model.getHeadPitch());
+		}
+		
+		public Vec3 getViewPoint() {
+			return viewPoint;
+		}
+	}
+
+	protected final Body body;
+	protected final Head head;
+	
+	private float walkingParameter = 0;
+	private float velocityParameter = 0;
+	private float velocity = 0;
+	
+	/**
+	 * If {@link #velocity} is greater than this value, {@link #velocityParameter} is 1.0.
+	 */
+	private float maxEffectiveVelocity = 5 * Units.METERS_PER_SECOND;
+	
+	/**
+	 * If {@link #velocity} is less than {@link #maxEffectiveVelocity}, then
+	 * {@code velocityCoeff = exp(velocity / maxEffectiveVelocity, velocityCoeffPower)}.
+	 */
+	private float velocityCoeffPower = 1;
+	
+	private final float scale;
+	
+	private float walkingFrequency;
+	
+	private float bodyYaw = Float.NaN;
+	private float headYaw;
+	private float headPitch;
+
+	public NPedModel(EntityData data, Body body, Head head, float scale) {
+		super(data);
+		this.body = body;
+		this.head = head;
+		this.scale = scale;
+	}
+
+	@Override
+	public void render(ShapeRenderHelper renderer) {
+		renderer.pushTransform().scale(scale).rotateZ(bodyYaw);
+		renderBodyParts(renderer);
+		renderer.popTransform();
+		
+		accountForVelocity();
+		evaluateAngles();
+	}
+
+	protected void renderBodyParts(ShapeRenderHelper renderer) {
+		body.render(renderer, this);
+		head.render(renderer, this);
+	}
+
+	private void evaluateAngles() {
+		float globalYaw = normalizeAngle(getData().getYaw());
+		
+		if (Float.isNaN(bodyYaw)) {
+			bodyYaw = globalYaw;
+			headYaw = 0;
+		} else {
+			headYaw = normalizeAngle(globalYaw - bodyYaw);
+			
+			if (headYaw > +head.maxYaw) {
+				bodyYaw += headYaw - +head.maxYaw;
+				headYaw = +head.maxYaw;
+			} else if (headYaw < -head.maxYaw) {
+				bodyYaw += headYaw - -head.maxYaw;
+				headYaw = -head.maxYaw;
+			}
+		}
+		
+		bodyYaw = normalizeAngle(bodyYaw);
+		
+		headPitch = Glm.clamp(
+				getData().getPitch(),
+				-head.maxPitch, head.maxPitch
+		);
+	}
+
+	private void accountForVelocity() {
+		Vec3 horizontal = Vectors.grab3();
+		horizontal.set(getData().getVelocity());
+		horizontal.z = 0;
+		
+		velocity = horizontal.length();
+		
+		evaluateVelocityCoeff();
+		
+		// TODO switch to world time
+		walkingParameter += velocity * GraphicsInterface.getFrameLength() * 1000;
+		
+		bodyYaw += velocityParameter * normalizeAngle(
+				(float) (atan2(horizontal.y, horizontal.x) - bodyYaw)
+		) * min(1, GraphicsInterface.getFrameLength() * 10);
+		Vectors.release(horizontal);
+	}
+
+	private void evaluateVelocityCoeff() {
+		if (velocity > maxEffectiveVelocity) {
+			velocityParameter = 1;
+		} else {
+			velocityParameter = (float) pow(velocity / maxEffectiveVelocity, velocityCoeffPower);
+		}
+	}
+
+	@Override
+	public void getViewPoint(Vec3 output) {
+		Mat4 m = Matrices.grab4();
+		Vec4 v = Vectors.grab4();
+		
+		m.identity()
+		.scale(scale)
+		.rotateZ(bodyYaw)
+		.translate(head.getTranslation())
+		.rotateZ(headYaw)
+		.rotateY(headPitch);
+		
+		v.set(head.getViewPoint(), 1);
+		m.mul(v);
+		
+		output.set(v.x, v.y, v.z);
+		
+		Vectors.release(v);
+		Matrices.release(m);
+	}
+	
+	public Body getBody() {
+		return body;
+	}
+	
+	public Head getHead() {
+		return head;
+	}
+	
+	public float getBodyYaw() {
+		return bodyYaw;
+	}
+	
+	public float getHeadYaw() {
+		return headYaw;
+	}
+	
+	public float getHeadPitch() {
+		return headPitch;
+	}
+	
+	/**
+	 * Returns a number in the range [0; 1] that can be used to scale animation effects that depend on speed.
+	 * This parameter is 0 when the entity is not moving and 1 when it's moving "fast".
+	 * @return velocity parameter
+	 */
+	protected float getVelocityParameter() {
+		return velocityParameter;
+	}
+	
+	/**
+	 * Returns a number that can be used to parameterize animation effects that depend on walking.
+	 * This parameter increases when the entity moves (e.g. this can be total traveled distance).
+	 * @return walking parameter
+	 */
+	protected float getWalkingParameter() {
+		return walkingParameter;
+	}
+	
+	protected float getVelocity() {
+		return velocity;
+	}
+	
+	public float getScale() {
+		return scale;
+	}
+	
+	protected float getWalkingFrequency() {
+		return walkingFrequency;
+	}
+	
+	public NPedModel setWalkingFrequency(float walkingFrequency) {
+		this.walkingFrequency = walkingFrequency;
+		return this;
+	}
+	
+	public float getMaxEffectiveVelocity() {
+		return maxEffectiveVelocity;
+	}
+	
+	public float getVelocityCoeffPower() {
+		return velocityCoeffPower;
+	}
+	
+	public NPedModel setMaxEffectiveVelocity(float maxEffectiveVelocity) {
+		this.maxEffectiveVelocity = maxEffectiveVelocity;
+		return this;
+	}
+	
+	public NPedModel setVelocityCoeffPower(float velocityCoeffPower) {
+		this.velocityCoeffPower = velocityCoeffPower;
+		return this;
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/world/entity/QuadripedModel.java

@@ -2,86 +2,15 @@ package ru.windcorp.progressia.client.world.entity;
 
 import static java.lang.Math.*;
 import static ru.windcorp.progressia.common.util.FloatMathUtils.*;
+import static ru.windcorp.progressia.common.util.FloatMathUtils.sin;
 
-import glm.Glm;
 import glm.mat._4.Mat4;
 import glm.vec._3.Vec3;
-import glm.vec._4.Vec4;
-import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
-import ru.windcorp.progressia.common.util.Matrices;
-import ru.windcorp.progressia.common.util.Vectors;
 import ru.windcorp.progressia.common.world.entity.EntityData;
 
-public class QuadripedModel extends EntityRenderable {
+public class QuadripedModel extends NPedModel {
-	
-	private static abstract class BodyPart {
-		private final Renderable renderable;
-		private final Vec3 translation = new Vec3();
-
-		public BodyPart(Renderable renderable, Vec3 joint) {
-			this.renderable = renderable;
-			if (joint != null) {
-				this.translation.set(joint);
-			}
-		}
-		
-		
-		protected void render(
-				ShapeRenderHelper renderer, QuadripedModel model
-		) {
-			renderer.pushTransform().translate(translation);
-			applyTransform(renderer.pushTransform(), model);
-			renderable.render(renderer);
-			renderer.popTransform();
-			renderer.popTransform();
-		}
-
-		protected abstract void applyTransform(Mat4 mat, QuadripedModel model);
-		
-		public Vec3 getTranslation() {
-			return translation;
-		}
-	}
-	
-	public static class Body extends BodyPart {
-		public Body(Renderable renderable) {
-			super(renderable, null);
-		}
-		
-		@Override
-		protected void applyTransform(Mat4 mat, QuadripedModel model) {
-			// Do nothing
-		}
-	}
-	
-	public static class Head extends BodyPart {
-		private final float maxYaw;
-		private final float maxPitch;
-		
-		private final Vec3 viewPoint;
-		
-		public Head(
-				Renderable renderable, Vec3 joint,
-				double maxYawDegrees, double maxPitchDegrees,
-				Vec3 viewPoint
-		) {
-			super(renderable, joint);
-			this.maxYaw = (float) toRadians(maxYawDegrees);
-			this.maxPitch = (float) toRadians(maxPitchDegrees);
-			this.viewPoint = viewPoint;
-		}
-		
-		@Override
-		protected void applyTransform(Mat4 mat, QuadripedModel model) {
-			mat.rotateZ(model.headYaw).rotateY(model.headPitch);
-		}
-		
-		public Vec3 getViewPoint() {
-			return viewPoint;
-		}
-	}
 	
 	public static class Leg extends BodyPart {
 		private final float animationOffset;
@@ -95,34 +24,20 @@ public class QuadripedModel extends EntityRenderable {
 		}
 		
 		@Override
-		protected void applyTransform(Mat4 mat, QuadripedModel model) {
+		protected void applyTransform(Mat4 mat, NPedModel model) {
-			mat.rotateY(sin(model.walkingFrequency * model.walkingAnimationParameter + animationOffset) * model.walkingSwing * model.velocityCoeff);
+			float phase = model.getWalkingFrequency() * model.getWalkingParameter() + animationOffset;
-		}
+			float value = sin(phase);
+			float amplitude = ((QuadripedModel) model).getWalkingSwing() * model.getVelocityParameter();
+			mat.rotateY(value * amplitude);
+		}
+		
 	}
 	
-	private final Body body;
-	private final Head head;
 	private final Leg leftForeLeg, rightForeLeg;
 	private final Leg leftHindLeg, rightHindLeg;
 	
-	private final float scale;
-	
-	private float walkingAnimationParameter = 0;
-	private float velocityCoeff = 0;
-	private float velocity = 0;
-	
-	/**
-	 * Controls how quickly velocityCoeff approaches 1
-	 */
-	private float velocityCutoff = 10;
-	
-	private float walkingFrequency = 0.15f / 60.0f;
 	private float walkingSwing = (float) toRadians(30);
 
-	private float bodyYaw = Float.NaN;
-	private float headYaw;
-	private float headPitch;
-
 	public QuadripedModel(
 			EntityData entity,
 			
@@ -132,105 +47,30 @@ public class QuadripedModel extends EntityRenderable {
 			
 			float scale
 	) {
-		super(entity);
+		super(entity, body, head, scale);
 		
-		this.body = body;
-		this.head = head;
 		this.leftForeLeg = leftForeLeg;
 		this.rightForeLeg = rightForeLeg;
 		this.leftHindLeg = leftHindLeg;
 		this.rightHindLeg = rightHindLeg;
-		
-		this.scale = scale;
 	}
 	
 	@Override
-	public void render(ShapeRenderHelper renderer) {
+	protected void renderBodyParts(ShapeRenderHelper renderer) {
-		renderer.pushTransform().scale(scale).rotateZ(bodyYaw);
+		super.renderBodyParts(renderer);
-		body.render(renderer, this);
+		this.leftForeLeg.render(renderer, this);
-		head.render(renderer, this);
+		this.rightForeLeg.render(renderer, this);
-		leftForeLeg.render(renderer, this);
+		this.leftHindLeg.render(renderer, this);
-		rightForeLeg.render(renderer, this);
+		this.rightHindLeg.render(renderer, this);
-		leftHindLeg.render(renderer, this);
-		rightHindLeg.render(renderer, this);
-		renderer.popTransform();
-		
-		accountForVelocity();
-		evaluateAngles();
 	}
 	
-	private void evaluateAngles() {
+	public float getWalkingSwing() {
-		float globalYaw = normalizeAngle(getData().getYaw());
+		return walkingSwing;
-		
-		if (Float.isNaN(bodyYaw)) {
-			bodyYaw = globalYaw;
-			headYaw = 0;
-		} else {
-			headYaw = normalizeAngle(globalYaw - bodyYaw);
-			
-			if (headYaw > +head.maxYaw) {
-				bodyYaw += headYaw - +head.maxYaw;
-				headYaw = +head.maxYaw;
-			} else if (headYaw < -head.maxYaw) {
-				bodyYaw += headYaw - -head.maxYaw;
-				headYaw = -head.maxYaw;
-			}
 	}
 	
-		bodyYaw = normalizeAngle(bodyYaw);
+	public QuadripedModel setWalkingSwing(float walkingSwing) {
-		
+		this.walkingSwing = walkingSwing;
-		headPitch = Glm.clamp(
+		return this;
-				getData().getPitch(),
-				-head.maxPitch, head.maxPitch
-		);
-	}
-
-	private void accountForVelocity() {
-		Vec3 horizontal = Vectors.grab3();
-		horizontal.set(getData().getVelocity());
-		horizontal.z = 0;
-		
-		velocity = horizontal.length();
-		
-		evaluateVelocityCoeff();
-		
-		// TODO switch to world time
-		walkingAnimationParameter += velocity * GraphicsInterface.getFrameLength() * 1000;
-		
-		bodyYaw += velocityCoeff * normalizeAngle(
-				(float) (atan2(horizontal.y, horizontal.x) - bodyYaw)
-		) * min(1, GraphicsInterface.getFrameLength() * 10);
-		Vectors.release(horizontal);
-	}
-	
-	private void evaluateVelocityCoeff() {
-		if (velocity * velocityCutoff > 1) {
-			velocityCoeff = 1;
-		} else {
-			velocityCoeff = velocity * velocityCutoff;
-			velocityCoeff *= velocityCoeff;
-		}
-	}
-	
-	@Override
-	public void getViewPoint(Vec3 output) {
-		Mat4 m = Matrices.grab4();
-		Vec4 v = Vectors.grab4();
-		
-		m.identity()
-		.scale(scale)
-		.rotateZ(bodyYaw)
-		.translate(head.getTranslation())
-		.rotateZ(headYaw)
-		.rotateY(headPitch);
-		
-		v.set(head.getViewPoint(), 1);
-		m.mul(v);
-		
-		output.set(v.x, v.y, v.z);
-		
-		Vectors.release(v);
-		Matrices.release(m);
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/world/tile/TileRender.java

@@ -3,13 +3,13 @@ package ru.windcorp.progressia.client.world.tile;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.world.cro.ChunkRenderOptimizer;
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 import ru.windcorp.progressia.common.world.block.BlockFace;
 
 public class TileRender extends Namespaced {
 
-	public TileRender(String namespace, String name) {
+	public TileRender(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	public void render(ShapeRenderHelper renderer, BlockFace face) {

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderGrass.java

@@ -18,10 +18,10 @@ public class TileRenderGrass extends TileRender implements OpaqueTile {
 	private final Texture sideTexture;
 	
 	public TileRenderGrass(
-			String namespace, String name,
+			String id,
 			Texture top, Texture side
 	) {
-		super(namespace, name);
+		super(id);
 		this.topTexture = top;
 		this.sideTexture = side;
 	}

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderRegistry.java

@@ -22,9 +22,9 @@ import ru.windcorp.progressia.client.graphics.texture.Atlases.AtlasGroup;
 import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
 import ru.windcorp.progressia.common.resource.ResourceManager;
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
 
-public class TileRenderRegistry extends NamespacedRegistry<TileRender> {
+public class TileRenderRegistry extends NamespacedInstanceRegistry<TileRender> {
 	
 	private static final TileRenderRegistry INSTANCE = new TileRenderRegistry();
 	

src/main/java/ru/windcorp/progressia/client/world/tile/TileRenderSimple.java

@@ -16,8 +16,8 @@ public class TileRenderSimple extends TileRender implements OpaqueTile {
 	
 	private final Texture texture;
 	
-	public TileRenderSimple(String namespace, String name, Texture texture) {
+	public TileRenderSimple(String id, Texture texture) {
-		super(namespace, name);
+		super(id);
 		this.texture = texture;
 	}
 

src/main/java/ru/windcorp/progressia/common/Units.java

@@ -0,0 +1,56 @@
+package ru.windcorp.progressia.common;
+
+public class Units {
+	
+	// Base units
+	// We're SI.
+	public static final float METERS                     = 1;
+	public static final float KILOGRAMS                  = 1;
+	public static final float SECONDS                    = 1;
+
+	// Length                                            
+	public static final float CENTIMETERS                = METERS / 100; 
+	public static final float MILLIMETERS                = METERS / 1000;
+	public static final float KILOMETERS                 = METERS * 1000;
+	
+	// Surface
+	public static final float SQUARE_CENTIMETERS         = CENTIMETERS * CENTIMETERS;
+	public static final float SQUARE_METERS              = METERS * METERS;
+	public static final float SQUARE_MILLIMETERS         = MILLIMETERS * MILLIMETERS;
+	public static final float SQUARE_KILOMETERS          = KILOMETERS * KILOMETERS;
+	
+	// Volume
+	public static final float CUBIC_CENTIMETERS          = CENTIMETERS * CENTIMETERS * CENTIMETERS;
+	public static final float CUBIC_METERS               = METERS * METERS * METERS;
+	public static final float CUBIC_MILLIMETERS          = MILLIMETERS * MILLIMETERS * MILLIMETERS;
+	public static final float CUBIC_KILOMETERS           = KILOMETERS * KILOMETERS * KILOMETERS;
+
+	// Mass                                              
+	public static final float GRAMS                      = KILOGRAMS / 1000;
+	public static final float TONNES                     = KILOGRAMS * 1000;
+	
+	// Density
+	public static final float KILOGRAMS_PER_CUBIC_METER  = KILOGRAMS / CUBIC_METERS;
+	public static final float GRAMS_PER_CUBIC_CENTIMETER = GRAMS / CUBIC_CENTIMETERS;
+
+	// Time                                              
+	public static final float MILLISECONDS               = SECONDS / 1000;
+	public static final float MINUTES                    = SECONDS * 60;
+	public static final float HOURS                      = MINUTES * 60;
+	public static final float DAYS                       = HOURS * 24;
+	
+	// Frequency
+	public static final float HERTZ                      = 1 / SECONDS;
+	public static final float KILOHERTZ                  = HERTZ * 1000;
+
+	// Velocity                                          
+	public static final float METERS_PER_SECOND          = METERS / SECONDS;
+	public static final float KILOMETERS_PER_HOUR        = KILOMETERS / HOURS;
+
+	// Acceleration                                      
+	public static final float METERS_PER_SECOND_SQUARED  = METERS_PER_SECOND / SECONDS;
+
+	// Force                                             
+	public static final float NEWTONS                    = METERS_PER_SECOND_SQUARED * KILOGRAMS;
+
+}

src/main/java/ru/windcorp/progressia/common/collision/AABB.java

@@ -1,35 +1,63 @@
 package ru.windcorp.progressia.common.collision;
 
-import java.util.Collection;
-import java.util.Map;
-
 import glm.vec._3.Vec3;
-import ru.windcorp.progressia.common.world.block.BlockFace;
 
-public class AABB implements CollisionModel {
+/**
+ * An implementation of an
+ * <a href="https://en.wikipedia.org/wiki/Minimum_bounding_box#Axis-aligned_minimum_bounding_box">Axis-Aligned Bounding Box</a>.
+ * @author javapony
+ */
+public class AABB implements AABBoid {
 	
-	private final Map<BlockFace, CollisionWall> faces = BlockFace.mapToFaces(
+	private class AABBWallImpl implements Wall {
-			new CollisionWall(-0.5f, -0.5f, -0.5f,   +1,  0,  0,    0,  0, +1),
-			new CollisionWall(+0.5f, -0.5f, -0.5f,    0, +1,  0,    0,  0, +1),
-			new CollisionWall(+0.5f, +0.5f, -0.5f,   -1,  0,  0,    0,  0, +1),
-			new CollisionWall(-0.5f, +0.5f, -0.5f,    0, -1,  0,    0,  0, +1),
 		
-			new CollisionWall(-0.5f, -0.5f, +0.5f,   +1,  0,  0,    0, +1,  0),
+		private final Vec3 originOffset = new Vec3();
-			new CollisionWall(-0.5f, -0.5f, -0.5f,    0, +1,  0,   +1,  0,  0)
+		private final Vec3 widthSelector = new Vec3();
-	);
+		private final Vec3 heightSelector = new Vec3();
+
+		public AABBWallImpl(
+			float ox, float oy, float oz,
+			float wx, float wy, float wz,
+			float hx, float hy, float hz
+		) {
+			this.originOffset.set(ox, oy, oz);
+			this.widthSelector.set(wx, wy, wz);
+			this.heightSelector.set(hx, hy, hz);
+		}
+
+		@Override
+		public void getOrigin(Vec3 output) {
+			output.set(originOffset).mul(AABB.this.getSize()).add(AABB.this.getOrigin());
+		}
+	
+		@Override
+		public void getWidth(Vec3 output) {
+			output.set(AABB.this.getSize()).mul(widthSelector);
+		}
+	
+		@Override
+		public void getHeight(Vec3 output) {
+			output.set(AABB.this.getSize()).mul(heightSelector);
+		}
+		
+	}
+	
+	public static final AABB UNIT_CUBE = new AABB(0, 0, 0, 1, 1, 1);
+	
+	private final Wall[] walls = new Wall[] {
+			new AABBWallImpl(-0.5f, -0.5f, +0.5f,   +1,  0,  0,    0, +1,  0), // Top
+			new AABBWallImpl(-0.5f, -0.5f, -0.5f,    0, +1,  0,   +1,  0,  0), // Bottom
+			new AABBWallImpl(+0.5f, -0.5f, -0.5f,    0, +1,  0,    0,  0, +1), // North
+			new AABBWallImpl(-0.5f, +0.5f, -0.5f,    0, -1,  0,    0,  0, +1), // South
+			new AABBWallImpl(+0.5f, +0.5f, -0.5f,   -1,  0,  0,    0,  0, +1), // West
+			new AABBWallImpl(-0.5f, -0.5f, -0.5f,   +1,  0,  0,    0,  0, +1)  // East
+	};
 	
 	private final Vec3 origin = new Vec3();
 	private final Vec3 size = new Vec3();
 	
 	public AABB(Vec3 origin, Vec3 size) {
-		this.origin.set(origin);
+		this(origin.x, origin.y, origin.z, size.x, size.y, size.z);
-		this.size.set(size);
-		
-		for (CollisionWall wall : getFaces()) {
-			wall.moveOrigin(origin);
-			wall.getWidth().mul(size);
-			wall.getHeight().mul(size);
-		}
 	}
 	
 	public AABB(
@@ -38,16 +66,6 @@ public class AABB implements CollisionModel {
 	) {
 		this.origin.set(ox, oy, oz);
 		this.size.set(xSize, ySize, zSize);
-		
-		for (CollisionWall wall : getFaces()) {
-			wall.moveOrigin(ox, oy, oz);
-			wall.getWidth().mul(xSize, ySize, zSize);
-			wall.getHeight().mul(xSize, ySize, zSize);
-		}
-	}
-	
-	public Collection<CollisionWall> getFaces() {
-		return faces.values();
 	}
 	
 	public Vec3 getOrigin() {
@@ -55,20 +73,17 @@ public class AABB implements CollisionModel {
 	}
 
 	@Override
-	public void setOrigin(Vec3 origin) {
+	public void getOrigin(Vec3 output) {
-		for (CollisionWall wall : getFaces()) {
+		output.set(origin);
-			wall.getOrigin().sub(this.origin).add(origin);
 	}
 	
+	@Override
+	public void setOrigin(Vec3 origin) {
 		this.origin.set(origin);
 	}
 	
 	@Override
 	public void moveOrigin(Vec3 displacement) {
-		for (CollisionWall wall : getFaces()) {
-			wall.getOrigin().add(displacement);
-		}
-
 		this.origin.add(displacement);
 	}
 	
@@ -76,18 +91,23 @@ public class AABB implements CollisionModel {
 		return size;
 	}
 
+	@Override
+	public void getSize(Vec3 output) {
+		output.set(size);
+	}
+	
 	public void setSize(Vec3 size) {
 		setSize(size.x, size.y, size.z);
 	}
 	
 	public void setSize(float xSize, float ySize, float zSize) {
-		for (CollisionWall wall : getFaces()) {
-			wall.getWidth().div(this.size).mul(xSize, ySize, zSize);
-			wall.getHeight().div(this.size).mul(xSize, ySize, zSize);
-			wall.getOrigin().sub(getOrigin()).div(this.size).mul(xSize, ySize, zSize).add(getOrigin());
-		}
-		
 		this.size.set(xSize, ySize, zSize);
 	}
 
+	@Override
+	public Wall getWall(int faceId) {
+		// No, we don't support Apple.
+		return walls[faceId];
+	}
+	
 }

src/main/java/ru/windcorp/progressia/common/collision/AABBoid.java

@@ -0,0 +1,17 @@
+package ru.windcorp.progressia.common.collision;
+
+import glm.vec._3.Vec3;
+import ru.windcorp.progressia.common.world.block.BlockFace;
+
+public interface AABBoid extends CollisionModel {
+	
+	void getOrigin(Vec3 output);
+	void getSize(Vec3 output);
+	
+	default Wall getWall(BlockFace face) {
+		return getWall(face.getId());
+	}
+	
+	Wall getWall(int faceId);
+
+}

src/main/java/ru/windcorp/progressia/common/collision/CollisionClock.java

@@ -1,8 +0,0 @@
-package ru.windcorp.progressia.common.collision;
-
-public interface CollisionClock {
-	
-	float getTime();
-	void advanceTime(float change);
-
-}

src/main/java/ru/windcorp/progressia/common/collision/CollisionPathComputer.java

@@ -0,0 +1,81 @@
+package ru.windcorp.progressia.common.collision;
+
+import java.util.function.Consumer;
+
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.common.util.Vectors;
+
+import static java.lang.Math.*;
+
+public class CollisionPathComputer {
+	
+	private static final float PADDING = 0.5f;
+	
+	public static void forEveryBlockInCollisionPath(
+			Collideable coll,
+			float maxTime,
+			Consumer<Vec3i> action
+	) {
+		Vec3 displacement = Vectors.grab3();
+		coll.getCollideableVelocity(displacement);
+		displacement.mul(maxTime);
+		
+		handleModel(coll.getCollisionModel(), displacement, action);
+		
+		Vectors.release(displacement);
+	}
+
+	private static void handleModel(
+			CollisionModel model,
+			Vec3 displacement,
+			Consumer<Vec3i> action
+	) {
+		if (model instanceof CompoundCollisionModel) {
+			for (CollisionModel subModel : ((CompoundCollisionModel) model).getModels()) {
+				handleModel(subModel, displacement, action);
+			}
+		} else if (model instanceof AABBoid) {
+			handleAABBoid((AABBoid) model, displacement, action);
+		} else {
+			throw new RuntimeException("not supported");
+		}
+	}
+
+	private static void handleAABBoid(AABBoid model, Vec3 displacement, Consumer<Vec3i> action) {
+		Vec3 size = Vectors.grab3();
+		Vec3 origin = Vectors.grab3();
+		
+		model.getOrigin(origin);
+		model.getSize(size);
+		
+		origin.mul(2).sub(size).div(2); // Subtract 0.5*size
+		
+		Vec3i pos = Vectors.grab3i();
+		
+		for (
+				pos.x =  (int) floor(origin.x + min(0, size.x) + min(0, displacement.x) - PADDING);
+				pos.x <= (int)  ceil(origin.x + max(0, size.x) + max(0, displacement.x) + PADDING);
+				pos.x += 1
+		) {
+			for (
+					pos.y =  (int) floor(origin.y + min(0, size.y) + min(0, displacement.y) - PADDING);
+					pos.y <= (int)  ceil(origin.y + max(0, size.y) + max(0, displacement.y) + PADDING);
+					pos.y += 1
+			) {
+				for (
+						pos.z =  (int) floor(origin.z + min(0, size.z) + min(0, displacement.z) - PADDING);
+						pos.z <= (int)  ceil(origin.z + max(0, size.z) + max(0, displacement.z) + PADDING);
+						pos.z += 1
+				) {
+					action.accept(pos);
+				}
+			}
+		}
+		
+		Vectors.release(origin);
+		Vectors.release(size);
+		Vectors.release(pos);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/collision/CollisionWall.java

@@ -1,55 +0,0 @@
-package ru.windcorp.progressia.common.collision;
-
-import glm.vec._3.Vec3;
-
-public class CollisionWall {
-	
-	private final Vec3 origin = new Vec3();
-	private final Vec3 width = new Vec3();
-	private final Vec3 height = new Vec3();
-	
-	public CollisionWall(Vec3 origin, Vec3 width, Vec3 height) {
-		this.origin.set(origin);
-		this.width.set(width);
-		this.height.set(height);
-	}
-	
-	public CollisionWall(
-		float ox, float oy, float oz,
-		float wx, float wy, float wz,
-		float hx, float hy, float hz
-	) {
-		this.origin.set(ox, oy, oz);
-		this.width.set(wx, wy, wz);
-		this.height.set(hx, hy, hz);
-	}
-	
-	public Vec3 getOrigin() {
-		return origin;
-	}
-	
-	public Vec3 getWidth() {
-		return width;
-	}
-	
-	public Vec3 getHeight() {
-		return height;
-	}
-	
-	public void setOrigin(Vec3 origin) {
-		setOrigin(origin.x, origin.y, origin.z);
-	}
-	
-	public void setOrigin(float x, float y, float z) {
-		this.origin.set(x, y, z);
-	}
-	
-	public void moveOrigin(Vec3 displacement) {
-		moveOrigin(displacement.x, displacement.y, displacement.z);
-	}
-	
-	public void moveOrigin(float dx, float dy, float dz) {
-		this.origin.add(dx, dy, dz);
-	}
-
-}

src/main/java/ru/windcorp/progressia/common/collision/CompoundCollisionModel.java

@@ -8,9 +8,9 @@ import glm.vec._3.Vec3;
 
 public class CompoundCollisionModel implements CollisionModel {
 	
-	private final Collection<CollisionModel> models;
+	private final Collection<? extends CollisionModel> models;
 
-	public CompoundCollisionModel(Collection<CollisionModel> models) {
+	public CompoundCollisionModel(Collection<? extends CollisionModel> models) {
 		this.models = models;
 	}
 	
@@ -18,7 +18,7 @@ public class CompoundCollisionModel implements CollisionModel {
 		this(ImmutableList.copyOf(models));
 	}
 	
-	public Collection<CollisionModel> getModels() {
+	public Collection<? extends CollisionModel> getModels() {
 		return models;
 	}
 

src/main/java/ru/windcorp/progressia/common/collision/TranslatedAABB.java

@@ -0,0 +1,105 @@
+package ru.windcorp.progressia.common.collision;
+
+import glm.vec._3.Vec3;
+import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.block.BlockFace;
+
+public class TranslatedAABB implements AABBoid {
+	
+	private class TranslatedAABBWall implements Wall {
+		private final int id;
+		
+		public TranslatedAABBWall(int id) {
+			this.id = id;
+		}
+
+		@Override
+		public void getOrigin(Vec3 output) {
+			parent.getWall(id).getOrigin(output);
+			output.add(translation);
+		}
+		
+		@Override
+		public void getWidth(Vec3 output) {
+			parent.getWall(id).getWidth(output);
+		}
+		
+		@Override
+		public void getHeight(Vec3 output) {
+			parent.getWall(id).getHeight(output);
+		}
+	}
+	
+	private AABBoid parent;
+	private final Vec3 translation = new Vec3();
+	
+	private final TranslatedAABBWall[] walls = new TranslatedAABBWall[BlockFace.BLOCK_FACE_COUNT];
+	
+	{
+		for (int id = 0; id < walls.length; ++id) {
+			walls[id] = new TranslatedAABBWall(id);
+		}
+	}
+	
+	public TranslatedAABB(AABBoid parent, float tx, float ty, float tz) {
+		setParent(parent);
+		setTranslation(tx, ty, tz);
+	}
+	
+	public TranslatedAABB(AABBoid parent, Vec3 translation) {
+		this(parent, translation.x, translation.y, translation.z);
+	}
+	
+	public TranslatedAABB() {
+		this(null, 0, 0, 0);
+	}
+
+	@Override
+	public void setOrigin(Vec3 origin) {
+		Vec3 v = Vectors.grab3().set(origin).sub(translation);
+		parent.setOrigin(v);
+		Vectors.release(v);
+	}
+
+	@Override
+	public void moveOrigin(Vec3 displacement) {
+		parent.moveOrigin(displacement);
+	}
+
+	@Override
+	public void getOrigin(Vec3 output) {
+		parent.getOrigin(output);
+		output.add(translation);
+	}
+
+	@Override
+	public void getSize(Vec3 output) {
+		parent.getSize(output);
+	}
+
+	@Override
+	public Wall getWall(int faceId) {
+		return walls[faceId];
+	}
+	
+	public AABBoid getParent() {
+		return parent;
+	}
+	
+	public void setParent(AABBoid parent) {
+		this.parent = parent;
+	}
+	
+	public Vec3 getTranslation() {
+		return translation;
+	}
+	
+	public void setTranslation(Vec3 translation) {
+		setTranslation(translation.x, translation.y, translation.z);
+	}
+	
+	public void setTranslation(float tx, float ty, float tz) {
+		this.translation.set(tx, ty, tz);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/collision/Wall.java

@@ -0,0 +1,12 @@
+package ru.windcorp.progressia.common.collision;
+
+import glm.vec._3.Vec3;
+
+public interface Wall {
+	
+	void getOrigin(Vec3 output);
+	
+	void getWidth(Vec3 output);
+	void getHeight(Vec3 output);
+
+}

src/main/java/ru/windcorp/progressia/common/collision/WorldCollisionHelper.java

@@ -0,0 +1,94 @@
+package ru.windcorp.progressia.common.collision;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.common.util.LowOverheadCache;
+import ru.windcorp.progressia.common.world.WorldData;
+
+public class WorldCollisionHelper {
+	
+	private final Collideable collideable = new Collideable() {
+		@Override
+		public boolean onCollision(Collideable other) {
+			return false;
+		}
+		
+		@Override
+		public void moveAsCollideable(Vec3 displacement) {
+			// Ignore
+			assert displacement.length() < 1e-3f;
+		}
+		
+		@Override
+		public CollisionModel getCollisionModel() {
+			return WorldCollisionHelper.this.model;
+		}
+		
+		@Override
+		public float getCollisionMass() {
+			return Float.POSITIVE_INFINITY;
+		}
+		
+		@Override
+		public void getCollideableVelocity(Vec3 output) {
+			output.set(0);
+		}
+		
+		@Override
+		public void changeVelocityOnCollision(Vec3 velocityChange) {
+			// Ignore
+			assert velocityChange.length() < 1e-3f;
+		}
+	};
+	
+	private final Collection<TranslatedAABB> activeBlockModels = new ArrayList<>();
+	private final CollisionModel model = new CompoundCollisionModel(activeBlockModels);
+	private final LowOverheadCache<TranslatedAABB> blockModelCache = new LowOverheadCache<>(TranslatedAABB::new);
+	
+	/**
+	 * Changes the state of this helper's {@link #getCollideable()} so it is ready to adequately handle
+	 * collisions with the {@code collideable} that might happen in the next {@code maxTime} seconds.
+	 * This helper is only valid for checking collisions with the given Collideable and only within
+	 * the given time limit.
+	 * @param collideable the {@link Collideable} that collisions will be checked against
+	 * @param maxTime maximum collision time
+	 */
+	public void tuneToCollideable(WorldData world, Collideable collideable, float maxTime) {
+		activeBlockModels.forEach(blockModelCache::release);
+		activeBlockModels.clear();
+		CollisionPathComputer.forEveryBlockInCollisionPath(
+				collideable,
+				maxTime,
+				v -> addModel(world.getCollisionModelOfBlock(v), v)
+		);
+	}
+	
+	private void addModel(CollisionModel model, Vec3i pos) {
+		if (model == null) {
+			// Ignore
+		} else if (model instanceof AABBoid) {
+			addAABBoidModel((AABBoid) model, pos);
+		} else if (model instanceof CompoundCollisionModel) {
+			for (CollisionModel subModel : ((CompoundCollisionModel) model).getModels()) {
+				addModel(subModel, pos);
+			}
+		} else {
+			throw new RuntimeException("not supported");
+		}
+	}
+	
+	private void addAABBoidModel(AABBoid model, Vec3i pos) {
+		TranslatedAABB translator = blockModelCache.grab();
+		translator.setParent(model);
+		translator.setTranslation(pos.x, pos.y, pos.z);
+		activeBlockModels.add(translator);
+	}
+
+	public Collideable getCollideable() {
+		return collideable;
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/collision/colliders/AABBoidCollider.java

@@ -2,26 +2,25 @@ package ru.windcorp.progressia.common.collision.colliders;
 
 import glm.mat._3.Mat3;
 import glm.vec._3.Vec3;
-import ru.windcorp.progressia.common.collision.AABB;
+import ru.windcorp.progressia.common.collision.*;
-import ru.windcorp.progressia.common.collision.Collideable;
-import ru.windcorp.progressia.common.collision.CollisionWall;
 import ru.windcorp.progressia.common.collision.colliders.Collider.ColliderWorkspace;
 import ru.windcorp.progressia.common.collision.colliders.Collider.Collision;
 import ru.windcorp.progressia.common.util.Matrices;
 import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.block.BlockFace;
 
-class AABBWithAABBCollider {
+class AABBoidCollider {
 	
 	static Collider.Collision computeModelCollision(
 			Collideable aBody, Collideable bBody,
-			AABB aModel, AABB bModel,
+			AABBoid aModel, AABBoid bModel,
 			float tickLength,
 			ColliderWorkspace workspace
 	) {
 		Collideable obstacleBody = bBody;
 		Collideable colliderBody = aBody;
-		AABB obstacleModel = bModel;
+		AABBoid obstacleModel = bModel;
-		AABB colliderModel = aModel;
+		AABBoid colliderModel = aModel;
 		
 		Collision result = null;
 		
@@ -32,7 +31,8 @@ class AABBWithAABBCollider {
 		computeCollisionVelocity(collisionVelocity, obstacleBody, colliderBody);
 		
 		// For every wall of collision space
-		for (CollisionWall wall : originCollisionSpace.getFaces()) {
+		for (int i = 0; i < BlockFace.BLOCK_FACE_COUNT; ++i) {
+			Wall wall = originCollisionSpace.getWall(i);
 				
 			Collision collision = computeWallCollision(
 					wall, colliderModel,
@@ -80,12 +80,21 @@ class AABBWithAABBCollider {
 		Vectors.release(colliderVelocity);
 	}
 
-	private static AABB createOriginCollisionSpace(AABB obstacle, AABB collider, AABB output) {
+	private static AABB createOriginCollisionSpace(AABBoid obstacle, AABBoid collider, AABB output) {
-		output.setOrigin(obstacle.getOrigin());
+		Vec3 obstacleOrigin = Vectors.grab3();
+		Vec3 obstacleSize = Vectors.grab3();
+		Vec3 colliderSize = Vectors.grab3();
 		
-		Vec3 size = Vectors.grab3().set(obstacle.getSize()).add(collider.getSize());
+		obstacle.getOrigin(obstacleOrigin);
-		output.setSize(size);
+		output.setOrigin(obstacleOrigin);
-		Vectors.release(size);
+		
+		obstacle.getSize(obstacleSize);
+		collider.getSize(colliderSize);
+		output.setSize(obstacleSize.add(colliderSize));
+		
+		Vectors.release(obstacleOrigin);
+		Vectors.release(obstacleSize);
+		Vectors.release(colliderSize);
 		
 		return output;
 	}
@@ -134,27 +143,34 @@ class AABBWithAABBCollider {
 	 * If all conditions are satisfied, then the moment of impact is t0 + t.
 	 */
 	private static Collision computeWallCollision(
-			CollisionWall obstacleWall,
+			Wall obstacleWall,
-			AABB colliderModel,
+			AABBoid colliderModel,
 			Vec3 collisionVelocity,
 			float tickLength, ColliderWorkspace workspace,
 			Collideable aBody, Collideable bBody
 	) {
-		Vec3 w = obstacleWall.getWidth();
+		Vec3 w = Vectors.grab3();
-		Vec3 h = obstacleWall.getHeight();
+		Vec3 h = Vectors.grab3();
 		Vec3 v = Vectors.grab3();
 		Mat3 m = Matrices.grab3(); // The matrix [w h -v]
 		Vec3 r = Vectors.grab3();
+		Vec3 r_line = Vectors.grab3();
+		Vec3 r_wall = Vectors.grab3();
 		Vec3 xyt = Vectors.grab3();
 		
 		try {
+			obstacleWall.getWidth(w);
+			obstacleWall.getHeight(h);
+			
 			v.set(collisionVelocity);
 			
 			if (isExiting(v, w, h)) {
 				return null;
 			}
 			
-			r.set(colliderModel.getOrigin()).sub(obstacleWall.getOrigin());
+			obstacleWall.getOrigin(r_wall);
+			colliderModel.getOrigin(r_line);
+			r.set(r_line).sub(r_wall);
 			m.c0(w).c1(h).c2(v.negate());
 			
 			if (Math.abs(m.det()) < 1e-6) {
@@ -179,9 +195,13 @@ class AABBWithAABBCollider {
 			
 			return workspace.grab().set(aBody, bBody, obstacleWall, t);
 		} finally {
+			Vectors.release(w);
+			Vectors.release(h);
 			Vectors.release(v);
-			Vectors.release(r);
 			Matrices.release(m);
+			Vectors.release(r);
+			Vectors.release(r_line);
+			Vectors.release(r_wall);
 			Vectors.release(xyt);
 		}
 	}
@@ -193,6 +213,6 @@ class AABBWithAABBCollider {
 		return result;
 	}
 
-	private AABBWithAABBCollider() {}
+	private AABBoidCollider() {}
 
 }

src/main/java/ru/windcorp/progressia/common/collision/colliders/Collider.java

@@ -6,22 +6,35 @@ import java.util.List;
 import org.apache.logging.log4j.LogManager;
 
 import glm.vec._3.Vec3;
-import ru.windcorp.progressia.common.collision.AABB;
+import ru.windcorp.progressia.common.collision.*;
-import ru.windcorp.progressia.common.collision.Collideable;
-import ru.windcorp.progressia.common.collision.CollisionClock;
-import ru.windcorp.progressia.common.collision.CollisionModel;
-import ru.windcorp.progressia.common.collision.CollisionWall;
-import ru.windcorp.progressia.common.collision.CompoundCollisionModel;
 import ru.windcorp.progressia.common.util.LowOverheadCache;
 import ru.windcorp.progressia.common.util.Vectors;
+import ru.windcorp.progressia.common.world.WorldData;
 
 public class Collider {
 	
 	private static final int MAX_COLLISIONS_PER_ENTITY = 64;
 	
+	/**
+	 * Dear Princess Celestia,
+	 * <p>
+	 * When {@linkplain #advanceTime(Collection, Collision, WorldData, float) advancing time},
+	 * time step for all entities <em>except</em> currently colliding bodies is the current
+	 * collisions's timestamp relative to now. However, currently colliding bodies
+	 * (Collision.a and Collision.b) have a smaller time step. This is done to make sure
+	 * they don't intersect due to rounding errors.
+	 * <p>
+	 * Today I learned that bad code has nothing to do with friendship, although lemme tell ya:
+	 * it's got some dank magic.
+	 * <p>
+	 * Your faithful student,<br />
+	 * Kostyl.
+	 */
+	private static final float TIME_STEP_COEFFICIENT_FOR_CURRENTLY_COLLIDING_BODIES = 1e-1f; 
+	
 	public static void performCollisions(
 			List<? extends Collideable> colls,
-			CollisionClock clock,
+			WorldData world,
 			float tickLength,
 			ColliderWorkspace workspace
 	) {
@@ -37,12 +50,12 @@ public class Collider {
 				return;
 			}
 			
-			Collision firstCollision = getFirstCollision(colls, tickLength, workspace);
+			Collision firstCollision = getFirstCollision(colls, tickLength, world, workspace);
 			
 			if (firstCollision == null) {
 				break;
 			} else {
-				collide(firstCollision, colls, clock, tickLength, workspace);
+				collide(firstCollision, colls, world, tickLength, workspace);
 				workspace.release(firstCollision);
 				collisionCount++;
 				
@@ -50,45 +63,49 @@ public class Collider {
 			}
 		}
 		
-		advanceTime(colls, clock, tickLength);
+		advanceTime(colls, null, world, tickLength);
 	}
 
 	private static Collision getFirstCollision(
 			List<? extends Collideable> colls,
 			float tickLength,
+			WorldData world,
 			ColliderWorkspace workspace
 	) {
 		Collision result = null;
+		Collideable worldColl = workspace.worldCollisionHelper.getCollideable();
 		
 		// For every pair of colls
 		for (int i = 0; i < colls.size(); ++i) {
 			Collideable a = colls.get(i);
 			
+			tuneWorldCollisionHelper(a, tickLength, world, workspace);
+			
+			result = workspace.updateLatestCollision(
+					result,
+					getCollision(a, worldColl, tickLength, workspace)
+			);
+			
 			for (int j = i + 1; j < colls.size(); ++j) {
 				Collideable b = colls.get(j);
-				
 				Collision collision = getCollision(a, b, tickLength, workspace);
-				
+				result = workspace.updateLatestCollision(result, collision);
-				// Update result
-				if (collision != null) {
-					Collision second;
-					
-					if (result == null || collision.time < result.time) {
-						second = result;
-						result = collision;
-					} else {
-						second = collision;
-					}
-					
-					// Release Collision that is no longer used
-					if (second != null) workspace.release(second);
-				}
 			}
 		}
 		
 		return result;
 	}
 	
+	private static void tuneWorldCollisionHelper(
+			Collideable coll,
+			float tickLength,
+			WorldData world,
+			ColliderWorkspace workspace
+	) {
+		WorldCollisionHelper wch = workspace.worldCollisionHelper;
+		wch.tuneToCollideable(world, coll, tickLength);
+	}
+
 	static Collision getCollision(
 			Collideable a,
 			Collideable b,
@@ -108,10 +125,10 @@ public class Collider {
 			float tickLength,
 			ColliderWorkspace workspace
 	) {
-		if (aModel instanceof AABB && bModel instanceof AABB) {
+		if (aModel instanceof AABBoid && bModel instanceof AABBoid) {
-			return AABBWithAABBCollider.computeModelCollision(
+			return AABBoidCollider.computeModelCollision(
 					aBody, bBody,
-					(AABB) aModel, (AABB) bModel,
+					(AABBoid) aModel, (AABBoid) bModel,
 					tickLength,
 					workspace
 			);
@@ -144,11 +161,11 @@ public class Collider {
 			Collision collision,
 			
 			Collection<? extends Collideable> colls,
-			CollisionClock clock,
+			WorldData world,
 			float tickLength,
 			ColliderWorkspace workspace
 	) {
-		advanceTime(colls, clock, collision.time);
+		advanceTime(colls, collision, world, collision.time);
 		
 		boolean doNotHandle = false;
 		
@@ -237,7 +254,7 @@ public class Collider {
 		Vec3 du_a = Vectors.grab3();
 		Vec3 du_b = Vectors.grab3();
 		
-		n.set(collision.wall.getWidth()).cross(collision.wall.getHeight()).normalize();
+		n.set(collision.wallWidth).cross(collision.wallHeight).normalize();
 		collision.a.getCollideableVelocity(v_a);
 		collision.b.getCollideableVelocity(v_b);
 		
@@ -274,8 +291,6 @@ public class Collider {
 		collision.a.changeVelocityOnCollision(du_a);
 		collision.b.changeVelocityOnCollision(du_b);
 		
-		separate(collision, n, m_a, m_b);
-		
 		// JGML is still to fuck
 		Vectors.release(n);
 		Vectors.release(v_a);
@@ -287,35 +302,26 @@ public class Collider {
 		Vectors.release(du_b);
 	}
 
-	private static void separate(
-			Collision collision,
-			Vec3 normal, float aRelativeMass, float bRelativeMass
-	) {
-		final float margin = 1e-4f;
-		
-		Vec3 displacement = Vectors.grab3();
-		
-		displacement.set(normal).mul(margin).mul(bRelativeMass);
-		collision.a.moveAsCollideable(displacement);
-		
-		displacement.set(normal).mul(margin).mul(aRelativeMass).negate();
-		collision.b.moveAsCollideable(displacement);
-		
-		Vectors.release(displacement);
-	}
-
 	private static void advanceTime(
 			Collection<? extends Collideable> colls,
-			CollisionClock clock,
+			Collision exceptions,
+			WorldData world,
 			float step
 	) {
-		clock.advanceTime(step);
+		world.advanceTime(step);
 		
 		Vec3 tmp = Vectors.grab3();
 		
 		for (Collideable coll : colls) {
 			coll.getCollideableVelocity(tmp);
-			tmp.mul(step);
+			
+			float currentStep = step;
+			
+			if (exceptions != null && (exceptions.a == coll || exceptions.b == coll)) {
+				currentStep *= TIME_STEP_COEFFICIENT_FOR_CURRENTLY_COLLIDING_BODIES;
+			}
+			
+			tmp.mul(currentStep);
 			coll.moveAsCollideable(tmp);
 		}
 		
@@ -329,6 +335,8 @@ public class Collider {
 		
 		AABB dummyAABB = new AABB(0, 0, 0, 1, 1, 1);
 		
+		WorldCollisionHelper worldCollisionHelper = new WorldCollisionHelper();
+
 		Collision grab() {
 			return collisionCache.grab();
 		}
@@ -337,12 +345,35 @@ public class Collider {
 			collisionCache.release(object);
 		}
 		
+		Collision updateLatestCollision(Collision a, Collision b) {
+			if (a == null) {
+				return b; // may be null
+			} else if (b == null) {
+				return a;
+			}
+			
+			Collision first, second;
+			
+			if (a.time > b.time) {
+				first = b;
+				second = a;
+			} else {
+				first = a;
+				second = b;
+			}
+			
+			release(second);
+			return first;
+		}
+		
 	}
 	
 	static class Collision {
 		public Collideable a;
 		public Collideable b;
-		public final CollisionWall wall = new CollisionWall(0, 0, 0, 0, 0, 0, 0, 0, 0);
+		
+		public final Vec3 wallWidth = new Vec3();
+		public final Vec3 wallHeight = new Vec3();
 		
 		/**
 		 * Time offset from the start of the tick.
@@ -350,12 +381,15 @@ public class Collider {
 		 */
 		public float time;
 		
-		public Collision set(Collideable a, Collideable b, CollisionWall wall, float time) {
+		public Collision set(
+				Collideable a, Collideable b,
+				Wall wall,
+				float time
+		) {
 			this.a = a;
 			this.b = b;
-			this.wall.getOrigin().set(wall.getOrigin());
+			wall.getWidth(wallWidth);
-			this.wall.getWidth().set(wall.getWidth());
+			wall.getHeight(wallHeight);
-			this.wall.getHeight().set(wall.getHeight());
 			this.time = time;
 			
 			return this;

src/main/java/ru/windcorp/progressia/common/comms/controls/ControlData.java

@@ -1,11 +1,11 @@
 package ru.windcorp.progressia.common.comms.controls;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 public class ControlData extends Namespaced {
 
-	public ControlData(String namespace, String name) {
+	public ControlData(String id) {
-		super(namespace, name);
+		super(id);
 	}
 
 }

src/main/java/ru/windcorp/progressia/common/comms/controls/ControlDataRegistry.java

@@ -1,8 +1,8 @@
 package ru.windcorp.progressia.common.comms.controls;
 
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedFactoryRegistry;
 
-public class ControlDataRegistry extends NamespacedRegistry<ControlData> {
+public class ControlDataRegistry extends NamespacedFactoryRegistry<ControlData> {
 	
 	private static final ControlDataRegistry INSTANCE = new ControlDataRegistry();
 	

src/main/java/ru/windcorp/progressia/common/comms/controls/PacketControl.java

@@ -6,8 +6,8 @@ public class PacketControl extends Packet {
 	
 	private final ControlData control;
 
-	public PacketControl(String namespace, String name, ControlData control) {
+	public PacketControl(String id, ControlData control) {
-		super(namespace, name);
+		super(id);
 		this.control = control;
 	}
 	

src/main/java/ru/windcorp/progressia/common/comms/packets/Packet.java

@@ -1,11 +1,11 @@
 package ru.windcorp.progressia.common.comms.packets;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 public class Packet extends Namespaced {
 
-	public Packet(String namespace, String name) {
+	public Packet(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 }

src/main/java/ru/windcorp/progressia/common/comms/packets/PacketSetLocalPlayer.java

@@ -5,7 +5,11 @@ public class PacketSetLocalPlayer extends Packet {
 	private long localPlayerEntityId;
 
 	public PacketSetLocalPlayer(long entityId) {
-		super("Core", "SetLocalPlayer");
+		this("Core:SetLocalPlayer", entityId);
+	}
+	
+	protected PacketSetLocalPlayer(String id, long entityId) {
+		super(id);
 		this.localPlayerEntityId = entityId;
 	}
 	

src/main/java/ru/windcorp/progressia/common/comms/packets/PacketWorldChange.java

@@ -4,8 +4,8 @@ import ru.windcorp.progressia.common.world.WorldData;
 
 public abstract class PacketWorldChange extends Packet {
 
-	public PacketWorldChange(String namespace, String name) {
+	public PacketWorldChange(String id) {
-		super(namespace, name);
+		super(id);
 	}
 	
 	public abstract void apply(WorldData world);

src/main/java/ru/windcorp/progressia/common/resource/Resource.java

@@ -30,6 +30,7 @@ import com.google.common.io.CharStreams;
 
 import ru.windcorp.progressia.Progressia;
 import ru.windcorp.progressia.common.util.Named;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
 
 public class Resource extends Named {
 
@@ -50,7 +51,8 @@ public class Resource extends Named {
 		try (Reader reader = getReader()) {
 			return CharStreams.toString(reader);
 		} catch (IOException e) {
-			throw new RuntimeException(e); // TODO handle gracefully
+			CrashReports.report(e, "Could not read resource %s as text", this);
+			return null;
 		}
 	}
 
@@ -59,7 +61,8 @@ public class Resource extends Named {
 		try (InputStream stream = getInputStream()) {
 			byteArray = ByteStreams.toByteArray(stream);
 		} catch (IOException e) {
-			throw new RuntimeException(e); // TODO handle gracefully
+			CrashReports.report(e, "Could not read resource %s as bytes", this);
+			return null;
 		}
 
 		if (output == null || output.remaining() < byteArray.length) {

src/main/java/ru/windcorp/progressia/common/state/InspectingStatefulObjectLayout.java

@@ -43,10 +43,8 @@ extends AbstractStatefulObjectLayout {
 	}
 	
 	@Override
-	public StateFieldBuilder getBuilder(String namespace, String name) {
+	public StateFieldBuilder getBuilder(String id) {
-		return new InspectingStateFieldBuilder(
+		return new InspectingStateFieldBuilder(id);
-				namespace, name
-		);
 	}
 	
 	private class InspectingStateFieldBuilder implements StateFieldBuilder {
@@ -56,7 +54,7 @@ extends AbstractStatefulObjectLayout {
 			@Override
 			public IntStateField build() {
 				return registerField(new IntStateField(
-						namespace, name,
+						id,
 						isLocal,
 						fieldIndexCounters.getIntsThenIncrement()
 				));
@@ -64,16 +62,12 @@ extends AbstractStatefulObjectLayout {
 			
 		}
 		
-		private final String namespace;
+		private final String id;
-		private final String name;
 		
 		private boolean isLocal = true;
 
-		public InspectingStateFieldBuilder(
+		public InspectingStateFieldBuilder(String id) {
-				String namespace, String name
+			this.id = id;
-		) {
-			this.namespace = namespace;
-			this.name = name;
 		}
 
 		@Override

src/main/java/ru/windcorp/progressia/common/state/IntStateField.java

@@ -7,11 +7,11 @@ import java.io.IOException;
 public class IntStateField extends StateField {
 
 	public IntStateField(
-			String namespace, String name,
+			String id,
 			boolean isLocal,
 			int index
 	) {
-		super(namespace, name, isLocal, index);
+		super(id, isLocal, index);
 	}
 	
 	public int get(StatefulObject object) {

src/main/java/ru/windcorp/progressia/common/state/OptimizedStatefulObjectLayout.java

@@ -35,7 +35,7 @@ extends AbstractStatefulObjectLayout {
 	}
 
 	@Override
-	public StateFieldBuilder getBuilder(String namespace, String name) {
+	public StateFieldBuilder getBuilder(String id) {
 		return new RetrieverStateFieldBuilder();
 	}
 	

src/main/java/ru/windcorp/progressia/common/state/StateField.java

@@ -4,7 +4,7 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 public abstract class StateField extends Namespaced {
 	
@@ -12,11 +12,11 @@ public abstract class StateField extends Namespaced {
 	private final int index;
 
 	public StateField(
-			String namespace, String name,
+			String id,
 			boolean isLocal,
 			int index
 	) {
-		super(namespace, name);
+		super(id);
 		this.isLocal = isLocal;
 		this.index = index;
 	}

src/main/java/ru/windcorp/progressia/common/state/StatefulObject.java

@@ -5,7 +5,7 @@ import java.io.DataOutput;
 import java.io.IOException;
 import java.util.Objects;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
 
 /**
  * An abstract class describing objects that have trackable state,
@@ -44,10 +44,9 @@ public abstract class StatefulObject extends Namespaced {
 
 	public StatefulObject(
 			StatefulObjectRegistry<?> type,
-			String namespace,
+			String id
-			String name
 	) {
-		super(namespace, name);
+		super(id);
 		this.layout = type.getLayout(getId());
 		this.storage = getLayout().createStorage();
 	}
@@ -96,8 +95,8 @@ public abstract class StatefulObject extends Namespaced {
 	 * 
 	 * @return a configured builder
 	 */
-	protected StateFieldBuilder field(String namespace, String name) {
+	protected StateFieldBuilder field(String id) {
-		StateFieldBuilder builder = getLayout().getBuilder(namespace, name);
+		StateFieldBuilder builder = getLayout().getBuilder(id);
 		
 		builder.setOrdinal(fieldOrdinal);
 		fieldOrdinal++;

src/main/java/ru/windcorp/progressia/common/state/StatefulObjectLayout.java

@@ -43,6 +43,6 @@ public abstract class StatefulObjectLayout {
 	public abstract int computeHashCode(StatefulObject object);
 	public abstract boolean areEqual(StatefulObject a, StatefulObject b);
 	
-	public abstract StateFieldBuilder getBuilder(String namespace, String name);
+	public abstract StateFieldBuilder getBuilder(String id);
 
 }

src/main/java/ru/windcorp/progressia/common/state/StatefulObjectRegistry.java

@@ -5,8 +5,8 @@ import java.util.Map;
 import java.util.WeakHashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import ru.windcorp.progressia.common.util.Namespaced;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
-import ru.windcorp.progressia.common.util.NamespacedRegistry;
+import ru.windcorp.progressia.common.util.namespaces.NamespacedInstanceRegistry;
 
 /**
  * Registry-like object for identification of various {@link StatefulObject}
@@ -30,8 +30,8 @@ public class StatefulObjectRegistry<T extends StatefulObject> {
 		
 		private final AtomicBoolean isRegistered = new AtomicBoolean(false);
 		
-		public Type(String namespace, String name, Factory<T> factory) {
+		public Type(String id, Factory<T> factory) {
-			super(namespace, name);
+			super(id);
 			this.factory = factory;
 		}
 
@@ -45,8 +45,8 @@ public class StatefulObjectRegistry<T extends StatefulObject> {
 		
 	}
 	
-	private final NamespacedRegistry<Type<T>> registry =
+	private final NamespacedInstanceRegistry<Type<T>> registry =
-			new NamespacedRegistry<Type<T>>() {
+			new NamespacedInstanceRegistry<Type<T>>() {
 				@Override
 				public void register(Type<T> element) {
 					super.register(element);
@@ -91,8 +91,8 @@ public class StatefulObjectRegistry<T extends StatefulObject> {
 		return registry.get(id).build();
 	}
 	
-	public void register(String namespace, String name, Factory<T> factory) {
+	public void register(String id, Factory<T> factory) {
-		registry.register(new Type<>(namespace, name, factory));
+		registry.register(new Type<>(id, factory));
 	}
 
 }

src/main/java/ru/windcorp/progressia/common/util/MultiLOC.java

@@ -0,0 +1,25 @@
+package ru.windcorp.progressia.common.util;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Supplier;
+
+public class MultiLOC {
+	
+	private final Map<Class<?>, LowOverheadCache<?>> caches = new HashMap<>();
+	
+	public <T> MultiLOC addClass(Class<T> clazz, Supplier<T> generator) {
+		caches.put(clazz, new LowOverheadCache<>(generator));
+		return this;
+	}
+	
+	public <T> T grab(Class<T> clazz) {
+		return clazz.cast(caches.get(clazz).grab());
+	}
+	
+	@SuppressWarnings("unchecked")
+	public void release(Object obj) {
+		((LowOverheadCache<Object>) caches.get(obj.getClass())).release(obj);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/util/NamespacedUtil.java

@@ -1,46 +0,0 @@
-package ru.windcorp.progressia.common.util;
-
-import java.util.Objects;
-import java.util.function.Predicate;
-import java.util.regex.Pattern;
-
-public class NamespacedUtil {
-	
-	public static final char SEPARATOR = ':';
-	public static final int MAX_PART_LENGTH = 127;
-	public static final int MAX_TOTAL_LENGTH = MAX_PART_LENGTH * 2 + 1;
-	
-	private static final String PART_REGEX = "^[A-Z][a-zA-Z0-9]{2,}$";
-	
-	private static final Predicate<String> PART_CHECKER =
-			Pattern.compile(PART_REGEX).asPredicate();
-	
-	public static String getId(String namespace, String name) {
-		checkPart(namespace, "Namespace");
-		checkPart(name, "Name");
-		
-		return namespace + SEPARATOR + name;
-	}
-	
-	private static void checkPart(String data, String name) {
-		Objects.requireNonNull(data, name);
-		
-		if (data.length() > MAX_PART_LENGTH) {
-			throw new IllegalArgumentException(
-					name + " \"" + data + "\" is too long. "
-							+ "Expected at most " + MAX_PART_LENGTH
-							+ " characters"
-			);
-		}
-		
-		if (!PART_CHECKER.test(name)) {
-			throw new IllegalArgumentException(
-					name + " \"" + data + "\" is invalid. "
-							+ "Allowed is: " + PART_REGEX
-			);
-		}
-	}
-	
-	private NamespacedUtil() {}
-
-}

src/main/java/ru/windcorp/progressia/common/util/VectorUtil.java

@@ -3,12 +3,22 @@ package ru.windcorp.progressia.common.util;
 import java.util.function.Consumer;
 
 import glm.mat._4.Mat4;
+import glm.vec._2.Vec2;
+import glm.vec._2.d.Vec2d;
+import glm.vec._2.i.Vec2i;
 import glm.vec._3.Vec3;
+import glm.vec._3.d.Vec3d;
 import glm.vec._3.i.Vec3i;
 import glm.vec._4.Vec4;
+import glm.vec._4.d.Vec4d;
+import glm.vec._4.i.Vec4i;
 
 public class VectorUtil {
 	
+	public static enum Axis {
+		X, Y, Z, W;
+	}
+	
 	public static void forEachVectorInCuboid(
 			int x0, int y0, int z0,
 			int x1, int y1, int z1,
@@ -47,6 +57,204 @@ public class VectorUtil {
 		inOut.set(vec4.x, vec4.y, vec4.z);
 	}
 	
+	public static Vec3 linearCombination(
+			Vec3 va, float ka,
+			Vec3 vb, float kb,
+			Vec3 output
+	) {
+		output.set(
+				va.x * ka + vb.x * kb,
+				va.y * ka + vb.y * kb,
+				va.z * ka + vb.z * kb
+		);
+		return output;
+	}
+	
+	public static Vec3 linearCombination(
+			Vec3 va, float ka,
+			Vec3 vb, float kb,
+			Vec3 vc, float kc,
+			Vec3 output
+	) {
+		output.set(
+				va.x * ka + vb.x * kb + vc.x * kc,
+				va.y * ka + vb.y * kb + vc.y * kc,
+				va.z * ka + vb.z * kb + vc.z * kc
+		);
+		return output;
+	}
+	
+	public static float get(Vec2 v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		default: throw new IllegalArgumentException("Vec2 does not have axis " + a);
+		}
+	}
+
+	public static Vec2 set(Vec2 v, Axis a, float value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		default: throw new IllegalArgumentException("Vec2 does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static int get(Vec2i v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		default: throw new IllegalArgumentException("Vec2i does not have axis " + a);
+		}
+	}
+
+	public static Vec2i set(Vec2i v, Axis a, int value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		default: throw new IllegalArgumentException("Vec2i does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static double get(Vec2d v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		default: throw new IllegalArgumentException("Vec2d does not have axis " + a);
+		}
+	}
+
+	public static Vec2d set(Vec2d v, Axis a, double value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		default: throw new IllegalArgumentException("Vec2d does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static float get(Vec3 v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		default: throw new IllegalArgumentException("Vec3 does not have axis " + a);
+		}
+	}
+
+	public static Vec3 set(Vec3 v, Axis a, float value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		default: throw new IllegalArgumentException("Vec3 does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static int get(Vec3i v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		default: throw new IllegalArgumentException("Vec3i does not have axis " + a);
+		}
+	}
+
+	public static Vec3i set(Vec3i v, Axis a, int value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		default: throw new IllegalArgumentException("Vec3i does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static double get(Vec3d v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		default: throw new IllegalArgumentException("Vec3d does not have axis " + a);
+		}
+	}
+
+	public static Vec3d set(Vec3d v, Axis a, double value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		default: throw new IllegalArgumentException("Vec3d does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static float get(Vec4 v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		case W: return v.w;
+		default: throw new IllegalArgumentException("Vec4 does not have axis " + a);
+		}
+	}
+
+	public static Vec4 set(Vec4 v, Axis a, float value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		case W: v.w = value; break;
+		default: throw new IllegalArgumentException("Vec4 does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static int get(Vec4i v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		case W: return v.w;
+		default: throw new IllegalArgumentException("Vec4i does not have axis " + a);
+		}
+	}
+
+	public static Vec4i set(Vec4i v, Axis a, int value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		case W: v.w = value; break;
+		default: throw new IllegalArgumentException("Vec4i does not have axis " + a);
+		}
+		return v;
+	}
+
+	public static double get(Vec4d v, Axis a) {
+		switch (a) {
+		case X: return v.x;
+		case Y: return v.y;
+		case Z: return v.z;
+		case W: return v.w;
+		default: throw new IllegalArgumentException("Vec4d does not have axis " + a);
+		}
+	}
+
+	public static Vec4d set(Vec4d v, Axis a, double value) {
+		switch (a) {
+		case X: v.x = value; break;
+		case Y: v.y = value; break;
+		case Z: v.z = value; break;
+		case W: v.w = value; break;
+		default: throw new IllegalArgumentException("Vec4d does not have axis " + a);
+		}
+		return v;
+	}
+	
 	private VectorUtil() {}
 
 }

src/main/java/ru/windcorp/progressia/common/util/Vectors.java

@@ -30,6 +30,19 @@ import glm.vec._4.i.Vec4i;
  */
 public class Vectors {
 	
+	public static final Vec2  ZERO_2  = new Vec2 (0, 0);
+	public static final Vec2i ZERO_2i = new Vec2i(0, 0);
+	public static final Vec3  ZERO_3  = new Vec3 (0, 0, 0);
+	public static final Vec3i ZERO_3i = new Vec3i(0, 0, 0);
+	public static final Vec4  ZERO_4  = new Vec4 (0, 0, 0, 0);
+	public static final Vec4i ZERO_4i = new Vec4i(0, 0, 0, 0);
+	public static final Vec2  UNIT_2  = new Vec2 (1, 1);
+	public static final Vec2i UNIT_2i = new Vec2i(1, 1);
+	public static final Vec3  UNIT_3  = new Vec3 (1, 1, 1);
+	public static final Vec3i UNIT_3i = new Vec3i(1, 1, 1);
+	public static final Vec4  UNIT_4  = new Vec4 (1, 1, 1, 1);
+	public static final Vec4i UNIT_4i = new Vec4i(1, 1, 1, 1);
+	
 	private static final LowOverheadCache<Vec3i> VEC3IS =
 			new LowOverheadCache<>(Vec3i::new);
 	

src/main/java/ru/windcorp/progressia/common/util/crash/Analyzer.java

@@ -0,0 +1,32 @@
+package ru.windcorp.progressia.common.util.crash;
+
+/**
+ * A crash report utility that performs analysis of a problem during crash
+ * report generation and presents its conclusion to the user via the crash report.
+ * Unlike {@link ContextProvider}s, Analyzers are provided with the reported problem
+ * details.
+ * @see ContextProvider
+ * @author serega404
+ */
+public interface Analyzer {
+	
+	/**
+	 * Provides a human-readable string describing this analyzer's conclusion
+	 * on the presented problem, or returns {@code null} if no conclusion
+	 * could be made.
+	 * @param throwable The reported throwable (may be {@code null})
+	 * @param messageFormat A {@linkplain java.util.Formatter#syntax format string} of a
+	 * human-readable description of the problem 
+	 * @param args The arguments for the format string
+	 * @return a conclusion or {@code null}
+	 */
+	String analyze(Throwable throwable, String messageFormat, Object... args);
+
+	/**
+	 * Returns this analyzer's human-readable name.
+	 * It should be A String In Title Case With Spaces.
+	 * @return this analyzer's name
+	 */
+	String getName();
+	
+}

src/main/java/ru/windcorp/progressia/common/util/crash/ContextProvider.java

@@ -0,0 +1,31 @@
+package ru.windcorp.progressia.common.util.crash;
+
+import java.util.Map;
+
+/**
+ * A crash report utility that gathers information about game and system state
+ * when a crash occurs and presents it to the user via the crash report.
+ * ContextProviders are not aware of the nature of the problem, unlike {@link Analyzer}s.
+ * @see Analyzer
+ * @author serega404
+ */
+public interface ContextProvider {
+	
+	/**
+	 * Provides human-readable description of the state of the game and the system.
+	 * This information is {@link Map#put(Object, Object) put} into the provided map
+	 * as key-value pairs. Keys are the characteristic being described, such as "OS Name",
+	 * and should be Strings In Title Case With Spaces.
+	 * If this provider cannot provide any information at this moment, the map is not
+	 * modified.
+	 * @param output the map to append output to
+	 */
+	void provideContext(Map<String, String> output);
+	
+	/**
+	 * Returns this provider's human-readable name.
+	 * It should be A String In Title Case With Spaces.
+	 * @return this provider's name
+	 */
+	String getName();
+}

src/main/java/ru/windcorp/progressia/common/util/crash/CrashReports.java

@@ -0,0 +1,232 @@
+package ru.windcorp.progressia.common.util.crash;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.core.util.StringBuilderWriter;
+
+import ru.windcorp.jputil.chars.StringUtil;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.Writer;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+public class CrashReports {
+
+    private CrashReports() {
+    }
+
+    private static final Path CRASH_REPORTS_PATH = Paths.get("crash-reports");
+
+    private static final Collection<ContextProvider> PROVIDERS = Collections.synchronizedCollection(new ArrayList<>());
+
+    private static final Collection<Analyzer> ANALYZERS = Collections.synchronizedCollection(new ArrayList<>());
+
+    private static final Logger LOGGER = LogManager.getLogger("crash");
+
+    /**
+     * <em>This method never returns.</em>
+     * <p>
+     * TODO document
+     *
+     * @param throwable
+     * @param messageFormat
+     * @param args
+     */
+    public static void report(Throwable throwable, String messageFormat, Object... args) {
+        StringBuilder output = new StringBuilder();
+
+        try {
+            String.format(messageFormat, args);
+        } catch (IllegalFormatException e) {
+            messageFormat = StringUtil.replaceAll(messageFormat, "%", "%%");
+
+            if (args.length != 0) {
+                messageFormat += "\nArgs:";
+                for (Object arg : args) {
+                    try {
+                        messageFormat += " \"" + arg.toString() + "\"";
+                    } catch (Throwable t) {
+                        messageFormat += " exc: \"" + t.getClass().toString() + "\"";
+                    }
+                }
+                args = new Object[0]; // clear args
+            }
+
+            messageFormat += "\nCould not format provided description";
+        }
+
+        appendContextProviders(output);
+        addSeparator(output);
+        if (appendAnalyzers(output, throwable, messageFormat, args)) {
+            addSeparator(output);
+        }
+
+        appendMessageFormat(output, messageFormat, args);
+
+        appendStackTrace(output, throwable);
+
+        export(output.toString());
+
+        System.exit(0);
+    }
+
+    private static void appendContextProviders(StringBuilder output) {
+
+        // Do a local copy to avoid deadlocks -OLEGSHA
+        ContextProvider[] localProvidersCopy = PROVIDERS.toArray(new ContextProvider[PROVIDERS.size()]);
+
+        for (ContextProvider provider : localProvidersCopy) {
+            if (provider == null)
+                continue;
+
+            addSeparator(output);
+
+            try {
+                Map<String, String> buf = new HashMap<>();
+                provider.provideContext(buf);
+
+                if (!buf.isEmpty()) {
+                    output.append("Provider name: ").append(provider.getName()).append("\n");
+                    for (Map.Entry<String, String> entry : buf.entrySet()) {
+                        output.append(entry.getKey()).append(": ").append(entry.getValue()).append("\n");
+                    }
+                }
+            } catch (Throwable t) {
+                output.append("\n");
+
+                String providerName;
+
+                try {
+                    providerName = provider.getName();
+                } catch (Throwable t1) {
+                    providerName = provider.getClass().getName();
+                }
+
+                output.append(providerName).append(" is broken").append("\n");
+                // ContextProvider is broken
+            }
+        }
+    }
+
+    private static boolean appendAnalyzers(StringBuilder output, Throwable throwable, String messageFormat,
+                                           Object[] args) {
+        boolean analyzerResponsesExist = false;
+
+        // Do a local copy to avoid deadlocks -OLEGSHA
+        Analyzer[] localAnalyzersCopy = ANALYZERS.toArray(new Analyzer[ANALYZERS.size()]);
+
+        for (Analyzer analyzer : localAnalyzersCopy) {
+            if (analyzer == null)
+                continue;
+
+            String answer;
+            try {
+                answer = analyzer.analyze(throwable, messageFormat, args);
+
+                if (answer != null && !answer.isEmpty()) {
+                    analyzerResponsesExist = true;
+                    output.append(analyzer.getName()).append(": ").append(answer).append("\n");
+                }
+            } catch (Throwable t) {
+                analyzerResponsesExist = true;
+
+                output.append("\n");
+
+                String analyzerName;
+
+                try {
+                    analyzerName = analyzer.getName();
+                } catch (Throwable t1) {
+                    analyzerName = analyzer.getClass().getName();
+                }
+
+                output.append(analyzerName).append(" is broken").append("\n");
+                // Analyzer is broken
+            }
+        }
+
+        return analyzerResponsesExist;
+    }
+
+    private static void appendMessageFormat(StringBuilder output, String messageFormat, Object... arg) {
+        output.append("Provided description: \n").append(String.format(messageFormat, arg)).append("\n");
+
+        addSeparator(output);
+    }
+
+    private static void appendStackTrace(StringBuilder output, Throwable throwable) {
+        output.append("Stacktrace: \n");
+
+        if (throwable == null) {
+            output.append("no Throwable provided").append("\n");
+            return;
+        }
+
+        // Formatting to a human-readable string
+        Writer sink = new StringBuilderWriter(output);
+        try {
+            throwable.printStackTrace(new PrintWriter(sink));
+        } catch (Exception e) {
+            // PLAK
+        }
+        output.append("\n");
+    }
+
+    private static void export(String report) {
+        try {
+            LOGGER.fatal("/n" + report);
+        } catch (Exception e) {
+            // PLAK
+        }
+
+        System.err.println(report);
+
+        generateCrashReportFiles(report);
+    }
+
+    private static void generateCrashReportFiles(String output) {
+        Date date = new Date();
+        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH.mm.ss");
+
+        try {
+            if (!Files.exists(CRASH_REPORTS_PATH))
+                Files.createDirectory(CRASH_REPORTS_PATH);
+
+            createFileForCrashReport(output, CRASH_REPORTS_PATH.toString() + "/latest.log");
+            createFileForCrashReport(output,
+                    CRASH_REPORTS_PATH.toString() + "/crash-" + dateFormat.format(date) + ".log");
+        } catch (Throwable t) {
+            // Crash Report not created
+        }
+    }
+
+    private static void createFileForCrashReport(String buffer, String filename) {
+        try (BufferedWriter writer = Files.newBufferedWriter(Paths.get(filename), StandardCharsets.UTF_8)) {
+            writer.write(buffer);
+        } catch (IOException ex) {
+            // Crash Report not created
+        }
+    }
+
+    public static void registerProvider(ContextProvider provider) {
+        PROVIDERS.add(provider);
+    }
+
+    public static void registerAnalyzer(Analyzer analyzer) {
+        ANALYZERS.add(analyzer);
+    }
+
+    private static void addSeparator(StringBuilder sb) {
+        sb.append(
+                // 80 chars
+                "--------------------------------------------------------------------------------").append("\n");
+    }
+}

src/main/java/ru/windcorp/progressia/common/util/crash/analyzers/OutOfMemoryAnalyzer.java

@@ -0,0 +1,17 @@
+package ru.windcorp.progressia.common.util.crash.analyzers;
+
+import ru.windcorp.progressia.common.util.crash.Analyzer;
+
+public class OutOfMemoryAnalyzer implements Analyzer {
+	@Override
+	public String analyze(Throwable throwable, String messageFormat, Object... args) {
+		if (throwable instanceof OutOfMemoryError)
+			return "Try to add memory to the JVM";
+		return null;
+	}
+
+	@Override
+	public String getName() {
+		return "Out Of Memory Analyzer";
+	}
+}

src/main/java/ru/windcorp/progressia/common/util/crash/providers/OSContextProvider.java

@@ -0,0 +1,20 @@
+package ru.windcorp.progressia.common.util.crash.providers;
+
+import ru.windcorp.progressia.common.util.crash.ContextProvider;
+
+import java.util.Map;
+
+public class OSContextProvider implements ContextProvider {
+
+	@Override
+	public void provideContext(Map<String, String> output) {
+		output.put("OS Name", System.getProperty("os.name"));
+		output.put("OS Version", System.getProperty("os.version"));
+		output.put("OS Architecture", System.getProperty("os.arch"));
+	}
+
+	@Override
+	public String getName() {
+		return "OS Context Provider";
+	}
+}

src/main/java/ru/windcorp/progressia/common/util/namespaces/IllegalIdException.java

@@ -0,0 +1,27 @@
+package ru.windcorp.progressia.common.util.namespaces;
+
+public class IllegalIdException extends RuntimeException {
+
+	private static final long serialVersionUID = -1572240191058305981L;
+
+	public IllegalIdException() {
+		super();
+	}
+
+	protected IllegalIdException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+	public IllegalIdException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public IllegalIdException(String message) {
+		super(message);
+	}
+
+	public IllegalIdException(Throwable cause) {
+		super(cause);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/util/namespaces/Namespaced.java

@@ -15,50 +15,27 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  *******************************************************************************/
-package ru.windcorp.progressia.common.util;
+package ru.windcorp.progressia.common.util.namespaces;
 
-import java.util.Objects;
+public abstract class Namespaced {
-import java.util.function.Predicate;
-import java.util.regex.Pattern;
 	
-public abstract class Namespaced extends Named {
-	
-	private static final char SEPARATOR = ':';
-	
-	private static final String PART_REGEX = "^[A-Z][a-zA-Z0-9]{2,}$";
-	
-	private static final Predicate<String> PART_CHECKER =
-			Pattern.compile(PART_REGEX).asPredicate();
-	
-	private final String namespace;
 	private final String id;
 
-	public Namespaced(String namespace, String name) {
+	public Namespaced(String id) {
-		super(name);
+		NamespacedUtil.checkId(id);
-		this.namespace = Objects.requireNonNull(namespace, "namespace");
+		this.id = id;
-		this.id = namespace + SEPARATOR + name;
-		
-		if (!PART_CHECKER.test(name)) {
-			throw new IllegalArgumentException(
-					"Name \"" + name + "\" is invalid. "
-							+ "Allowed is: " + PART_REGEX
-			);
 	}
 	
-		if (!PART_CHECKER.test(namespace)) {
+	public final String getId() {
-			throw new IllegalArgumentException(
-					"Namespace \"" + namespace + "\" is invalid. "
-							+ "Allowed is: " + PART_REGEX
-			);
-		}
-	}
-	
-	public String getId() {
 		return id;
 	}
 	
 	public String getNamespace() {
-		return namespace;
+		return NamespacedUtil.getNamespace(getId());
+	}
+	
+	public String getName() {
+		return NamespacedUtil.getName(getId());
 	}
 	
 	@Override
@@ -75,15 +52,10 @@ public abstract class Namespaced extends Named {
 	public boolean equals(Object obj) {
 		if (this == obj)
 			return true;
-		if (!super.equals(obj))
-			return false;
 		if (getClass() != obj.getClass())
 			return false;
 		Namespaced other = (Namespaced) obj;
-		if (id == null) {
+		if (!id.equals(other.id))
-			if (other.id != null)
-				return false;
-		} else if (!id.equals(other.id))
 			return false;
 		return true;
 	}

src/main/java/ru/windcorp/progressia/common/util/namespaces/NamespacedFactoryRegistry.java

@@ -0,0 +1,114 @@
+package ru.windcorp.progressia.common.util.namespaces;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class NamespacedFactoryRegistry<E extends Namespaced>
+implements Map<String, NamespacedFactoryRegistry.Factory<E>> {
+	
+	@FunctionalInterface
+	public static interface Factory<E> {
+		E build(String id);
+	}
+	
+	private final Map<String, Factory<E>> backingMap =
+			Collections.synchronizedMap(new HashMap<>());
+	
+	private final Logger logger = LogManager.getLogger(getClass());
+	
+	public void register(String id, Factory<E> element) {
+		if (get(id) != null) {
+			throw new IllegalArgumentException("ID " + id + " is already registered in " + getClass().getSimpleName());
+		}
+		
+		logger.debug("Registering {} in {}", id, getClass().getSimpleName());
+		backingMap.put(id, element);
+	}
+
+	@Override
+	public int size() {
+		return backingMap.size();
+	}
+
+	@Override
+	public boolean isEmpty() {
+		return backingMap.isEmpty();
+	}
+
+	@Override
+	public boolean containsKey(Object key) {
+		return backingMap.containsKey(key);
+	}
+	
+	public boolean has(String id) {
+		return backingMap.containsKey(id);
+	}
+
+	@Override
+	public boolean containsValue(Object value) {
+		return backingMap.containsValue(value);
+	}
+	
+	public boolean isRegistered(E element) {
+		return has(element.getId());
+	}
+
+	@Override
+	public Factory<E> get(Object key) {
+		return backingMap.get(key);
+	}
+	
+	public E create(String id) {
+		Factory<E> factory = get(id);
+		E result = factory.build(id);
+		if (!result.getId().equals(id)) {
+			throw new IllegalStateException("Requested ID " + id + " but factory " + factory + " returned an object with ID " + result.getId());
+		}
+		return result;
+	}
+	
+	@Override
+	public Factory<E> put(String id, Factory<E> factory) {
+		register(id, factory);
+		return null;
+	}
+	
+	@Override
+	public void putAll(Map<? extends String, ? extends Factory<E>> m) {
+		synchronized (backingMap) {
+			m.entrySet().forEach(e -> register(e.getKey(), e.getValue()));
+		}
+	}
+
+	@Override
+	public Factory<E> remove(Object key) {
+		return backingMap.remove(key);
+	}
+
+	@Override
+	public void clear() {
+		backingMap.clear();
+	}
+
+	@Override
+	public Set<String> keySet() {
+		return backingMap.keySet();
+	}
+
+	@Override
+	public Collection<Factory<E>> values() {
+		return backingMap.values();
+	}
+
+	@Override
+	public Set<Entry<String, Factory<E>>> entrySet() {
+		return backingMap.entrySet();
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/util/namespaces/NamespacedInstanceRegistry.java

@@ -1,4 +1,4 @@
-package ru.windcorp.progressia.common.util;
+package ru.windcorp.progressia.common.util.namespaces;
 
 import java.util.Collection;
 import java.util.Collections;
@@ -7,17 +7,20 @@ import java.util.Map;
 import java.util.Set;
 
 import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 import com.google.errorprone.annotations.DoNotCall;
 
-public class NamespacedRegistry<E extends Namespaced>
+public class NamespacedInstanceRegistry<E extends Namespaced>
 implements Map<String, E> {
 	
 	private final Map<String, E> backingMap =
 			Collections.synchronizedMap(new HashMap<>());
 	
+	private final Logger logger = LogManager.getLogger(getClass());
+	
 	public void register(E element) {
-		LogManager.getLogger(getClass()).debug("Registering " + element.getId());
+		logger.debug("Registering {} in {}", element.getId(), getClass().getSimpleName());
 		backingMap.put(element.getId(), element);
 	}
 	
@@ -67,7 +70,7 @@ implements Map<String, E> {
 	@DoNotCall @Deprecated
 	public E put(String key, E value) {
 		throw new UnsupportedOperationException(
-				"Use NamespacedRegistry.register(E)"
+				"Use NamespacedInstanceRegistry.register(E)"
 		);
 	}
 
@@ -83,7 +86,7 @@ implements Map<String, E> {
 	@DoNotCall @Deprecated
 	public void putAll(Map<? extends String, ? extends E> m) {
 		throw new UnsupportedOperationException(
-				"Use NamespacedRegistry.registerAll(Collection<? extends E>)"
+				"Use NamespacedInstanceRegistry.registerAll(Collection<? extends E>)"
 		);
 	}
 

src/main/java/ru/windcorp/progressia/common/util/namespaces/NamespacedUtil.java

@@ -0,0 +1,106 @@
+package ru.windcorp.progressia.common.util.namespaces;
+
+import java.util.Objects;
+
+import ru.windcorp.jputil.chars.StringUtil;
+
+public class NamespacedUtil {
+	
+	public static final char SEPARATOR = ':';
+	
+	public static final int MAX_ID_LENGTH = 255;
+	private static final int MAX_PART_LENGTH = (MAX_ID_LENGTH - 1) / 2;
+	
+	public static final int MAX_NAMESPACE_LENGTH = MAX_PART_LENGTH;
+	public static final int MAX_NAME_LENGTH = MAX_PART_LENGTH;
+	
+	private static final int MIN_PART_LENGTH = 3;
+	
+	public static final int MIN_NAMESPACE_LENGTH = MIN_PART_LENGTH;
+	public static final int MIN_NAME_LENGTH = MIN_PART_LENGTH;
+	
+	/*
+	 * This is the definition of the accepted pattern, but the value of
+	 * these constants is not actually consulted in the check* methods.
+	 */
+	private static final String PART_CORE_REGEX = "[A-Z][a-zA-Z0-9]{2," + (MAX_PART_LENGTH - 1) + "}";
+	private static final String PART_REGEX = "^" + PART_CORE_REGEX + "$";
+	
+	public static final String NAMESPACE_REGEX = PART_REGEX;
+	public static final String NAME_REGEX = PART_REGEX;
+	public static final String ID_REGEX = "^" + PART_CORE_REGEX + ":" + PART_CORE_REGEX + "$";
+	
+	public static String getName(String id) {
+		checkId(id);
+		return id.substring(id.indexOf(':') + 1);
+	}
+	
+	public static String getNamespace(String id) {
+		checkId(id);
+		return id.substring(0, id.indexOf(':'));
+	}
+	
+	public static String getId(String namespace, String name) {
+		checkPart(namespace, 0, namespace.length(), "Namespace");
+		checkPart(name, 0, name.length(), "Name");
+		
+		return namespace + SEPARATOR + name;
+	}
+	
+	public static void checkId(String id) {
+		Objects.requireNonNull(id, "id");
+		
+		int firstSeparator = id.indexOf(SEPARATOR);
+		
+		boolean areSeparatorsInvalid = (firstSeparator < 0) || (id.indexOf(SEPARATOR, firstSeparator + 1) >= 0);
+		
+		if (areSeparatorsInvalid) {
+			int separators = StringUtil.count(id, SEPARATOR);
+			throw new IllegalIdException(
+					"ID \"" + id + "\" is invalid. "
+							+ (separators == 0 ? "No " : "Too many (" + separators + ") ")
+							+ "separators '" + SEPARATOR + "' found, exactly one required"
+			);
+		}
+		
+		checkPart(id, 0, firstSeparator, "namespace");
+		checkPart(id, firstSeparator + 1, id.length() - firstSeparator - 1, "name");
+	}
+	
+	private static void checkPart(String data, int offset, int length, String nameForErrors) {
+		Objects.requireNonNull(data, nameForErrors);
+		
+		if (length > MAX_PART_LENGTH) {
+			throw new IllegalIdException(
+					nameForErrors + " \"" + data.substring(offset, offset + length) + "\" is too long. "
+							+ "Expected at most " + MAX_PART_LENGTH
+							+ " characters"
+			);
+		} else if (length < MIN_PART_LENGTH) {
+			throw new IllegalIdException(
+					nameForErrors + " \"" + data.substring(offset, offset + length) + "\" is too short. "
+							+ "Expected at lest " + MIN_PART_LENGTH
+							+ " characters"
+			);
+		}
+		
+		// Don't actually use *_REGEX for speed
+		
+		for (int i = 0; i < length; ++i) {
+			char c = data.charAt(i + offset);
+			if (!(
+					(          c >= 'A' && c <= 'Z') ||
+					(i != 0 && c >= 'a' && c <= 'z') ||
+					(i != 0 && c >= '0' && c <= '9')
+			)) {
+				throw new IllegalIdException(
+						nameForErrors + " \"" + data.substring(offset, offset + length) + "\" is invalid. "
+								+ "Allowed is: " + PART_REGEX
+				);
+			}
+		}
+	}
+	
+	private NamespacedUtil() {}
+
+}

src/main/java/ru/windcorp/progressia/common/world/BlockRay.java

@@ -0,0 +1,148 @@
+package ru.windcorp.progressia.common.world;
+
+import glm.vec._3.Vec3;
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.common.util.VectorUtil;
+import ru.windcorp.progressia.common.util.VectorUtil.Axis;
+import ru.windcorp.progressia.common.world.block.BlockFace;
+
+import static java.lang.Math.*;
+
+public class BlockRay {
+	
+	private final Vec3 position = new Vec3();
+	private final Vec3 direction = new Vec3();
+	
+	private float distance;
+	
+	private final Vec3i block = new Vec3i();
+	private BlockFace currentFace = null;
+	
+	private boolean isValid = false;
+	
+	public void start(Vec3 position, Vec3 direction) {
+		if (!direction.any()) {
+			throw new IllegalArgumentException("Direction is a zero vector");
+		}
+
+		isValid = true;
+		this.position.set(position).sub(0.5f); // Make sure lattice points are block vertices, not centers
+		this.direction.set(direction).normalize();
+		this.block.set(toBlock(position.x), toBlock(position.y), toBlock(position.z));
+		this.distance = 0;
+	}
+
+	public void end() {
+		isValid = false;
+	}
+	
+	public Vec3i next() {
+		checkState();
+		
+		float tx = distanceToEdge(position.x, direction.x);
+		float ty = distanceToEdge(position.y, direction.y);
+		float tz = distanceToEdge(position.z, direction.z);
+		
+		float tMin;
+		Axis axis;
+		
+		if (tx < ty && tx < tz) {
+			tMin = tx;
+			axis = Axis.X;
+		} else if (ty < tx && ty < tz) {
+			tMin = ty;
+			axis = Axis.Y;
+		} else {
+			tMin = tz;
+			axis = Axis.Z;
+		}
+		
+		// block.(axis) += signum(direction.(axis))
+		VectorUtil.set(block, axis, VectorUtil.get(block, axis) + (int) signum(VectorUtil.get(direction, axis)));
+		
+		// position += direction * tMin
+		VectorUtil.linearCombination(position, 1, direction, tMin, position); // position += direction * tMin
+		distance += tMin;
+		
+		// position.(axis) = round(position.(axis))
+		VectorUtil.set(position, axis, round(VectorUtil.get(position, axis)));
+		
+		this.currentFace = computeCurrentFace(axis, (int) signum(VectorUtil.get(direction, axis)));
+		
+		return block;
+	}
+
+	private static float distanceToEdge(float c, float dir) {
+		if (dir == 0) return Float.POSITIVE_INFINITY;
+		
+		float edge;
+		
+		if (dir > 0) {
+			edge = strictCeil(c);
+		} else {
+			edge = strictFloor(c);
+		}
+		
+		return (edge - c) / dir;
+	}
+
+	private BlockFace computeCurrentFace(Axis axis, int sign) {
+		if (sign == 0) throw new IllegalStateException("sign is zero");
+		
+		switch (axis) {
+		case X: return sign > 0 ? BlockFace.SOUTH  : BlockFace.NORTH;
+		case Y: return sign > 0 ? BlockFace.EAST   : BlockFace.WEST;
+		default:
+		case Z: return sign > 0 ? BlockFace.BOTTOM : BlockFace.TOP;
+		}
+	}
+	
+	public Vec3i current() {
+		checkState();
+		return block;
+	}
+	
+	public Vec3 getPoint(Vec3 output) {
+		output.set(position);
+		output.add(0.5f); // Make sure we're in the block-center coordinate system
+		return output;
+	}
+	
+	public BlockFace getCurrentFace() {
+		return currentFace;
+	}
+
+	public float getDistance() {
+		checkState();
+		return distance;
+	}
+	
+	private void checkState() {
+		if (!isValid) {
+			throw new IllegalStateException("BlockRay not started");
+		}
+	}
+	
+	private static int toBlock(float c) {
+		return (int) round(c);
+	}
+	
+	/**
+	 * Returns a smallest integer <i>a</i> such that <i>a</i> > <i>c</i>.
+	 * @param c the number to compute strict ceiling of
+	 * @return the strict ceiling of <i>c</i>
+	 */
+	private static float strictCeil(float c) {
+		return (float) (floor(c) + 1);
+	}
+	
+	/**
+	 * Returns a largest integer <i>a</i> such that <i>a</i> < <i>c</i>.
+	 * @param c the number to compute strict ceiling of
+	 * @return the strict ceiling of <i>c</i>
+	 */
+	private static float strictFloor(float c) {
+		return (float) (ceil(c) - 1);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/world/ChunkData.java

@@ -20,6 +20,7 @@ package ru.windcorp.progressia.common.world;
 import static ru.windcorp.progressia.common.world.block.BlockFace.*;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.function.BiConsumer;
@@ -63,8 +64,11 @@ public class ChunkData {
 	private final List<EntityData> entities =
 			Collections.synchronizedList(new ArrayList<>());
 	
-	public ChunkData(int x, int y, int z, WorldData world) {
+	private final Collection<ChunkDataListener> listeners =
-		this.position.set(x, y, z);
+			Collections.synchronizedCollection(new ArrayList<>());
+	
+	public ChunkData(Vec3i position, WorldData world) {
+		this.position.set(position.x, position.y, position.z);
 		this.world = world;
 		
 		tmp_generate();
@@ -80,7 +84,7 @@ public class ChunkData {
 		TileData flowers = TileDataRegistry.getInstance().get("Test:YellowFlowers");
 		TileData sand = TileDataRegistry.getInstance().get("Test:Sand");
 	
-		Vec3i aPoint = new Vec3i(5, 0, BLOCKS_PER_CHUNK + BLOCKS_PER_CHUNK/2);
+		Vec3i aPoint = new Vec3i(5, 0, BLOCKS_PER_CHUNK + BLOCKS_PER_CHUNK/2).sub(getPosition());
 		Vec3i pos = new Vec3i();
 		
 		for (int x = 0; x < BLOCKS_PER_CHUNK; ++x) {
@@ -92,11 +96,11 @@ public class ChunkData {
 					pos.set(x, y, z);
 					
 					if (f > 17) {
-						setBlock(pos, stone);
+						setBlock(pos, stone, false);
 					} else if (f > 14) {
-						setBlock(pos, dirt);
+						setBlock(pos, dirt, false);
 					} else {
-						setBlock(pos, air);
+						setBlock(pos, air, false);
 					}
 					
 				}
@@ -132,26 +136,36 @@ public class ChunkData {
 			}
 		}
 		
-		EntityData javapony = EntityDataRegistry.getInstance().create("Test:Javapony");
+		if (!getPosition().any()) {
-		javapony.setEntityId(0x42);
+			EntityData player = EntityDataRegistry.getInstance().create("Test:Player");
-		javapony.setPosition(new Vec3(-6, -6, 20));
+			player.setEntityId(0x42);
-		javapony.setDirection(new Vec2(
+			player.setPosition(new Vec3(-6, -6, 20));
+			player.setDirection(new Vec2(
 					(float) Math.toRadians(40), (float) Math.toRadians(45)
 			));
-		getEntities().add(javapony);
+			getEntities().add(player);
 			
 			EntityData statie = EntityDataRegistry.getInstance().create("Test:Statie");
 			statie.setEntityId(0xDEADBEEF);
 			statie.setPosition(new Vec3(0, 15, 16));
 			getEntities().add(statie);
 		}
+	}
 
 	public BlockData getBlock(Vec3i posInChunk) {
 		return blocks[getBlockIndex(posInChunk)];
 	}
 
-	public void setBlock(Vec3i posInChunk, BlockData block) {
+	public void setBlock(Vec3i posInChunk, BlockData block, boolean notify) {
+		BlockData previous = blocks[getBlockIndex(posInChunk)];
 		blocks[getBlockIndex(posInChunk)] = block;
+		
+		if (notify) {
+			getListeners().forEach(l -> {
+				l.onChunkBlockChanged(this, posInChunk, previous, block);
+				l.onChunkChanged(this);
+			});
+		}
 	}
 	
 	public List<TileData> getTilesOrNull(Vec3i blockInChunk, BlockFace face) {
@@ -243,7 +257,7 @@ public class ChunkData {
 	
 	private static void checkLocalCoordinates(Vec3i posInChunk) {
 		if (!isInBounds(posInChunk)) {
-			throw new IllegalArgumentException(
+			throw new IllegalCoordinatesException(
 					"Coordinates " + str(posInChunk) + " "
 							+ "are not legal chunk coordinates"
 			);
@@ -329,8 +343,28 @@ public class ChunkData {
 		return world;
 	}
 	
+	public Collection<ChunkDataListener> getListeners() {
+		return listeners;
+	}
+	
+	public void addListener(ChunkDataListener listener) {
+		this.listeners.add(listener);
+	}
+	
+	public void removeListener(ChunkDataListener listener) {
+		this.listeners.remove(listener);
+	}
+	
 	private static String str(Vec3i v) {
 		return "(" + v.x + "; " + v.y + "; " + v.z + ")";
 	}
 
+	protected void onLoaded() {
+		getListeners().forEach(l -> l.onChunkLoaded(this));
+	}
+	
+	protected void beforeUnloaded() {
+		getListeners().forEach(l -> l.beforeChunkUnloaded(this));
+	}
+
 }

src/main/java/ru/windcorp/progressia/common/world/ChunkDataListener.java

@@ -0,0 +1,51 @@
+package ru.windcorp.progressia.common.world;
+
+import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.common.world.block.BlockData;
+import ru.windcorp.progressia.common.world.block.BlockFace;
+import ru.windcorp.progressia.common.world.tile.TileData;
+
+public interface ChunkDataListener {
+	
+	/**
+	 * Invoked after a block has changed in a chunk.
+	 * This is not triggered when a change is caused by chunk loading or unloading.
+	 * @param chunk the chunk that has changed
+	 * @param blockInChunk the {@linkplain Coordinates#blockInChunk chunk coordinates} of the change
+	 * @param previous the previous occupant of {@code blockInChunk}
+	 * @param current the current (new) occupant of {@code blockInChunk}
+	 */
+	 default void onChunkBlockChanged(ChunkData chunk, Vec3i blockInChunk, BlockData previous, BlockData current) {}
+	
+	/**
+	 * Invoked after a tile has been added or removed from a chunk.
+	 * This is not triggered when a change is caused by chunk loading or unloading.
+	 * @param chunk the chunk that has changed
+	 * @param blockInChunk the {@linkplain Coordinates#blockInChunk chunk coordinates} of the change
+	 * @param face the face that the changed tile belongs or belonged to 
+	 * @param tile the tile that has been added or removed
+	 * @param wasAdded {@code true} iff the tile has been added, {@code false} iff the tile has been removed
+	 */
+	default void onChunkTilesChanged(ChunkData chunk, Vec3i blockInChunk, BlockFace face, TileData tile, boolean wasAdded) {}
+	
+	/**
+	 * Invoked whenever a chunk changes, loads or unloads. If some other method in this
+	 * {@code ChunkDataListener} are to be invoked, e.g. is the change was caused by a
+	 * block being removed, this method is called last.
+	 * @param chunk the chunk that has changed
+	 */
+	default void onChunkChanged(ChunkData chunk) {}
+	
+	/**
+	 * Invoked whenever a chunk has been loaded.
+	 * @param chunk the chunk that has loaded
+	 */
+	default void onChunkLoaded(ChunkData chunk) {}
+	
+	/**
+	 * Invoked whenever a chunk is about to be unloaded.
+	 * @param chunk the chunk that is going to be loaded
+	 */
+	default void beforeChunkUnloaded(ChunkData chunk) {}
+
+}

src/main/java/ru/windcorp/progressia/common/world/ChunkDataListeners.java

@@ -0,0 +1,25 @@
+package ru.windcorp.progressia.common.world;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+import glm.vec._3.i.Vec3i;
+
+public class ChunkDataListeners {
+	
+	public static WorldDataListener createAdder(Supplier<ChunkDataListener> listenerSupplier) {
+		return new WorldDataListener() {
+			@Override
+			public void getChunkListeners(WorldData world, Vec3i chunk, Consumer<ChunkDataListener> chunkListenerSink) {
+				chunkListenerSink.accept(listenerSupplier.get());
+			}
+		};
+	}
+	
+	public static WorldDataListener createAdder(ChunkDataListener listener) {
+		return createAdder(() -> listener);
+	}
+	
+	private ChunkDataListeners() {}
+
+}

src/main/java/ru/windcorp/progressia/common/world/Coordinates.java

@@ -11,18 +11,17 @@ import glm.vec._3.i.Vec3i;
  * Three types of coordinates are used in Progressia:
  * <ul>
  * 
- * <li><em>World coordinates</em>, in code referred to as {@code blockInWorld} -
+ * <li id="blockInWorld"><em>World coordinates</em>, in code referred to as {@code blockInWorld} -
  * coordinates relative to world origin. Every block in the world has unique
  * world coordinates.</li>
  * 
- * <li><em>Chunk coordinates</em>, in code referred to as {@code blockInChunk} -
+ * <li id="blockInChunk"><em>Chunk coordinates</em>, in code referred to as {@code blockInChunk} -
  * coordinates relative some chunk's origin. Every block in the chunk has unique
  * chunk coordinates, but blocks in different chunks may have identical chunk
  * coordinates. These coordinates are only useful in combination with a chunk
- * reference. Chunk coordinates are always <tt>[0; {@link #BLOCKS_PER_CHUNK})
+ * reference. Chunk coordinates are always <tt>[0; {@link #BLOCKS_PER_CHUNK})</tt>.</li>
- * </tt>.</li>
  * 
- * <li><em>Coordinates of chunk</em>, in code referred to as {@code chunk} -
+ * <li id="chunk"><em>Coordinates of chunk</em>, in code referred to as {@code chunk} -
  * chunk coordinates relative to world origin. Every chunk in the world has
  * unique coordinates of chunk.</li>
  * 

src/main/java/ru/windcorp/progressia/common/world/IllegalCoordinatesException.java

@@ -0,0 +1,28 @@
+package ru.windcorp.progressia.common.world;
+
+public class IllegalCoordinatesException extends RuntimeException {
+
+	private static final long serialVersionUID = 1362481281554206710L;
+
+	public IllegalCoordinatesException() {
+		super();
+	}
+
+	public IllegalCoordinatesException(String message) {
+		super(message);
+	}
+
+	public IllegalCoordinatesException(Throwable cause) {
+		super(cause);
+	}
+
+	public IllegalCoordinatesException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public IllegalCoordinatesException(String message, Throwable cause, boolean enableSuppression,
+			boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+}