Re-written flat render pipeline to support transforms

FlatRender now supports arbitrary transforms
GLSL 1.40 is now used in shaders

src/main/java/ru/windcorp/optica/client/graphics/Colors.java

@@ -33,6 +33,6 @@ public class Colors {
 			
 			DEBUG_CYAN    = 0x00FFFF,
 			DEBUG_MAGENTA = 0xFF00FF,
-			DEBUG_YELLOW  = 0x00FFFF;
+			DEBUG_YELLOW  = 0xFFFF00;
 
 }

src/main/java/ru/windcorp/optica/client/graphics/backend/InputHandler.java

@@ -26,18 +26,19 @@ public class InputHandler {
 	
 	private static final EventBus INPUT_EVENT_BUS = new EventBus("Input");
 
-	// ScrollEvent Start
+	// ScrollEvent
 
 	private static class ModifiableWheelScrollEvent extends WheelScrollEvent {
 
 		public void initialize(double xoffset, double yoffset) {
-			this.xoffset = xoffset;
-			this.yoffset = yoffset;
+			this.xOffset = xoffset;
+			this.yOffset = yoffset;
 		}
 
 	}
 
-	private static final ModifiableWheelScrollEvent THE_SCROLL_EVENT = new ModifiableWheelScrollEvent();
+	private static final ModifiableWheelScrollEvent THE_SCROLL_EVENT =
+			new ModifiableWheelScrollEvent();
 
 	static void handleMouseWheel(
 			long window,
@@ -49,7 +50,7 @@ public class InputHandler {
 		dispatch(THE_SCROLL_EVENT);
 	}
 
-	// KeyEvent Start
+	// KeyEvent
 	
 	private static class ModifiableKeyEvent extends KeyEvent {
 		
@@ -62,7 +63,8 @@ public class InputHandler {
 		
 	}
 
-	private static final ModifiableKeyEvent THE_KEY_EVENT = new ModifiableKeyEvent();
+	private static final ModifiableKeyEvent THE_KEY_EVENT =
+			new ModifiableKeyEvent();
 	
 	static void handleKeyInput(
 			long window,
@@ -76,7 +78,7 @@ public class InputHandler {
 		dispatch(THE_KEY_EVENT);
 	}
 
-	// CursorEvent Start
+	// CursorMoveEvent
 	
 	private static class ModifiableCursorMoveEvent extends CursorMoveEvent {
 		
@@ -111,6 +113,8 @@ public class InputHandler {
 		CURSOR_POSITION.set(x, y);
 	}
 	
+	// Misc
+	
 	public static double getCursorX() {
 		return CURSOR_POSITION.x;
 	}

src/main/java/ru/windcorp/optica/client/graphics/backend/shaders/CombinedShader.java

@@ -44,7 +44,7 @@ public class CombinedShader extends Shader {
 	}
 	
 	private static String combine(String[] resources) {
-		StringBuilder accumulator = new StringBuilder("#version 120\n");
+		StringBuilder accumulator = new StringBuilder("#version 140\n");
 		
 		for (String resourceName : resources) {
 			Resource resource = getShaderResource(resourceName);

src/main/java/ru/windcorp/optica/client/graphics/flat/AssembledFlatLayer.java

@@ -18,16 +18,16 @@
 package ru.windcorp.optica.client.graphics.flat;
 
 import ru.windcorp.optica.client.graphics.Layer;
-import ru.windcorp.optica.client.graphics.model.WorldRenderable;
 
 public abstract class AssembledFlatLayer extends Layer {
 
-	private final FlatRenderHelper helper = new FlatRenderHelper();
+	private final AssembledFlatRenderHelper helper =
+			new AssembledFlatRenderHelper();
 	
 	private final RenderTarget target = new RenderTarget();
 	
 	private boolean needsReassembly = true;
-	private Clip[] clips = null;
+	private RenderTarget.Clip[] clips = null;
 	
 	public AssembledFlatLayer(String name) {
 		super(name);
@@ -57,64 +57,11 @@ public abstract class AssembledFlatLayer extends Layer {
 			doReassemble();
 		}
 		
-		for (Clip clip : clips) {
+		for (RenderTarget.Clip clip : clips) {
 			clip.render(helper);
 		}
 		
 		helper.reset();
 	}
 	
-	public static class Clip {
-		
-		private final Mask mask = new Mask();
-		private final WorldRenderable renderable;
-
-		public Clip(
-				int startX, int startY,
-				int endX, int endY,
-				WorldRenderable renderable
-		) {
-			mask.set(startX, startY, endX, endY);
-			this.renderable = renderable;
-		}
-		
-		public Clip(
-				Mask mask,
-				WorldRenderable renderable
-		) {
-			this(
-					mask.getStartX(), mask.getStartY(),
-					mask.getEndX(), mask.getEndY(),
-					renderable
-			);
-		}
-
-		public int getStartX() {
-			return mask.getStartX();
-		}
-
-		public int getStartY() {
-			return mask.getStartY();
-		}
-
-		public int getEndX() {
-			return mask.getEndX();
-		}
-
-		public int getEndY() {
-			return mask.getEndY();
-		}
-
-		public WorldRenderable getRenderable() {
-			return renderable;
-		}
-		
-		public void render(FlatRenderHelper helper) {
-			helper.pushMask(getStartX(), getStartY(), getEndX(), getEndY());
-			renderable.render(helper);
-			helper.popTransform();
-		}
-		
-	}
-	
 }

src/main/java/ru/windcorp/optica/client/graphics/flat/AssembledFlatRenderHelper.java

@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.flat;
+
+import java.nio.FloatBuffer;
+
+public class AssembledFlatRenderHelper extends FlatRenderHelper {
+	
+	private FloatBuffer masks;
+
+	@Override
+	protected FloatBuffer getMasks() {
+		return masks;
+	}
+
+	public void setMasks(FloatBuffer masks) {
+		this.masks = masks;
+	}
+
+}

src/main/java/ru/windcorp/optica/client/graphics/flat/DefaultFlatRenderHelper.java

@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.flat;
+
+import java.nio.FloatBuffer;
+
+import glm.mat._4.Mat4;
+
+public class DefaultFlatRenderHelper extends FlatRenderHelper {
+	
+	private final TransformedMask transformer = new TransformedMask();
+	
+	protected final MaskStack maskStack = new MaskStack();
+	
+	protected final boolean[] hasMask = new boolean[TRANSFORM_STACK_SIZE];
+	
+	public void pushMask(Mask mask, Mat4 transform) {
+		pushMask(transformer.set(mask, transform), transform);
+	}
+	
+	public void pushMask(TransformedMask mask, Mat4 transform) {
+		hasMask[transformStack.getSize()] = true;
+		pushTransform().mul(transform);
+		maskStack.pushMask(mask);
+	}
+	
+	@Override
+	public Mat4 pushTransform() {
+		hasMask[transformStack.getSize()] = false;
+		return super.pushTransform();
+	}
+	
+	@Override
+	public void popTransform() {
+		super.popTransform();
+
+		if (hasMask[transformStack.getSize()]) {
+			maskStack.popMask();
+		}
+	}
+
+	@Override
+	public void reset() {
+		super.reset();
+		maskStack.clear();
+	}
+	
+	@Override
+	protected FloatBuffer getMasks() {
+		return maskStack.getBuffer();
+	}
+
+}

src/main/java/ru/windcorp/optica/client/graphics/flat/FlatRenderHelper.java

@@ -17,69 +17,28 @@
  *******************************************************************************/
 package ru.windcorp.optica.client.graphics.flat;
 
+import java.nio.FloatBuffer;
+
+import glm.mat._4.Mat4;
 import ru.windcorp.optica.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.optica.client.graphics.model.ShapeRenderHelper;
 
-public class FlatRenderHelper extends ShapeRenderHelper {
+public abstract class FlatRenderHelper extends ShapeRenderHelper {
 	
-	private static final float MAX_DEPTH = 1 << 16;
+	protected static final float MAX_DEPTH = 1 << 16;
 	
-	private final Mask mask = new Mask();
+	protected final Mat4 finalTransform = new Mat4();
 	
-	{
-		setupScreenTransform();
-	}
+	protected abstract FloatBuffer getMasks();
 	
-	public FlatRenderHelper pushMask(
-			int startX, int startY,
-			int endX, int endY
-	) {
-		mask.set(startX, startY, endX, endY);
-		pushTransform().translate(startX, startY, 0);
-		return this;
-	}
-	
-	public FlatRenderHelper pushMask(Mask mask) {
-		return pushMask(
-				mask.getStartX(), mask.getStartY(),
-				mask.getEndX(), mask.getEndY()
-		);
-	}
-
-	public int getStartX() {
-		return mask.getStartX();
-	}
-
-	public int getStartY() {
-		return mask.getStartY();
-	}
-
-	public int getEndX() {
-		return mask.getEndX();
-	}
-
-	public int getEndY() {
-		return mask.getEndY();
-	}
-	
-	public boolean isRenderable() {
-		return !mask.isEmpty();
-	}
-
 	@Override
-	public void reset() {
-		super.reset();
-		
-		setupScreenTransform();
-		mask.set(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE);
-	}
-	
-	private void setupScreenTransform() {
+	public Mat4 getFinalTransform() {
 		float width = GraphicsInterface.getFramebufferWidth();
 		float height = GraphicsInterface.getFramebufferHeight();
-
-		getTransform().translate(-1, +1, 0)
-		              .scale(2 / width, -2 / height, 1 / MAX_DEPTH);
+		
+		return finalTransform.identity().translate(-1, +1, 0)
+	              .scale(2 / width, -2 / height, 1 / MAX_DEPTH)
+	              .mul(getTransform());
 	}
 
 }

src/main/java/ru/windcorp/optica/client/graphics/flat/FlatRenderProgram.java

@@ -19,10 +19,12 @@ package ru.windcorp.optica.client.graphics.flat;
 
 import static org.lwjgl.opengl.GL11.*;
 
+import java.nio.FloatBuffer;
+
 import com.google.common.collect.ObjectArrays;
 
-import ru.windcorp.optica.client.graphics.backend.shaders.uniforms.Uniform2Int;
-import ru.windcorp.optica.client.graphics.model.Face;
+import ru.windcorp.optica.client.graphics.backend.shaders.uniforms.Uniform1Int;
+import ru.windcorp.optica.client.graphics.backend.shaders.uniforms.Uniform2Float;
 import ru.windcorp.optica.client.graphics.model.Shape;
 import ru.windcorp.optica.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.optica.client.graphics.model.ShapeRenderProgram;
@@ -42,17 +44,19 @@ public class FlatRenderProgram extends ShapeRenderProgram {
 		return def;
 	}
 	
+	public static final int MASK_STACK_SIZE = 16; // As in Flat.fragment.glsl
+	
 	private static final String FLAT_VERTEX_SHADER_RESOURCE =
 			"Flat.vertex.glsl";
 	private static final String FLAT_FRAGMENT_SHADER_RESOURCE =
 			"Flat.fragment.glsl";
 	
 	private static final String
-			MASK_START_UNIFORM_NAME = "maskStart",
-			MASK_END_UNIFORM_NAME   = "maskEnd";
+			MASK_COUNT_UNIFORM_NAME = "maskCount",
+			MASKS_UNIFORM_NAME      = "masks";
 	
-	private final Uniform2Int maskStartUniform;
-	private final Uniform2Int maskEndUniform;
+	private final Uniform1Int maskCountUniform;
+	private final Uniform2Float masksUniform;
 
 	public FlatRenderProgram(
 			String[] vertexShaderResources,
@@ -63,8 +67,8 @@ public class FlatRenderProgram extends ShapeRenderProgram {
 				attachFragmentShader(fragmentShaderResources)
 		);
 		
-		this.maskStartUniform = getUniform(MASK_START_UNIFORM_NAME).as2Int();
-		this.maskEndUniform = getUniform(MASK_END_UNIFORM_NAME).as2Int();
+		this.maskCountUniform = getUniform(MASK_COUNT_UNIFORM_NAME).as1Int();
+		this.masksUniform = getUniform(MASKS_UNIFORM_NAME).as2Float();
 	}
 	
 	private static String[] attachVertexShader(String[] others) {
@@ -77,15 +81,8 @@ public class FlatRenderProgram extends ShapeRenderProgram {
 	
 	@Override
 	public void render(ShapeRenderHelper helper, Shape shape) {
-		if (((FlatRenderHelper) helper).isRenderable()) {
-			super.render(helper, shape);
-		}
-	}
-	
-	@Override
-	protected void renderFace(Face face) {
 		glDisable(GL_CULL_FACE);
-		super.renderFace(face);
+		super.render(helper, shape);
 		glEnable(GL_CULL_FACE);
 	}
 	
@@ -94,8 +91,29 @@ public class FlatRenderProgram extends ShapeRenderProgram {
 		super.configure(argHelper);
 		FlatRenderHelper helper = ((FlatRenderHelper) argHelper);
 		
-		maskStartUniform.set(helper.getStartX(), helper.getStartY());
-		maskEndUniform.set(helper.getEndX(), helper.getEndY());
+		configureMasks(helper.getMasks());
+	}
+
+	private void configureMasks(FloatBuffer masks) {
+		int pos = masks.position();
+		int limit = masks.limit();
+		int size = pos / TransformedMask.SIZE_IN_FLOATS;
+		
+		maskCountUniform.set(size);
+		
+		masks.flip();
+		masksUniform.set(masks);
+		
+//		for (int i = 0; i < pos; ++i) {
+//			if (i % TransformedMask.SIZE_IN_FLOATS == 0) {
+//				System.out.print(" | ");
+//			}
+//			System.out.print(masks.get(i) + "; ");
+//		}
+//		System.out.println();
+		
+		masks.limit(limit);
+		masks.position(pos);
 	}
 
 }

src/main/java/ru/windcorp/optica/client/graphics/flat/LayerTestUI.java

@@ -21,14 +21,17 @@ import org.lwjgl.glfw.GLFW;
 
 import com.google.common.eventbus.Subscribe;
 
+import glm.mat._4.Mat4;
 import ru.windcorp.optica.client.graphics.Colors;
 import ru.windcorp.optica.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.optica.client.graphics.input.KeyEvent;
+import ru.windcorp.optica.client.graphics.model.LambdaModel;
 import ru.windcorp.optica.client.graphics.texture.SimpleTexture;
 import ru.windcorp.optica.client.graphics.texture.Sprite;
 import ru.windcorp.optica.client.graphics.texture.Texture;
 import ru.windcorp.optica.client.graphics.texture.TextureManager;
 import ru.windcorp.optica.client.graphics.texture.TextureSettings;
+import ru.windcorp.optica.client.graphics.world.LayerWorld;
 
 public class LayerTestUI extends AssembledFlatLayer {
 
@@ -40,37 +43,46 @@ public class LayerTestUI extends AssembledFlatLayer {
 	
 	private boolean flag = false;
 
-	private static int width = 512 + 256;
-	private static final int height = 64;
-	private static final int border = 5;
+	private static final int WIDTH = 512 + 256;
+	private static final int HEIGHT = 80;
+	private static final int BORDER = 5;
 
 	@Override
 	protected void assemble(RenderTarget target) {
-
-		
 		final int boxColor = flag ? 0xEE8888 : 0xEEEE88;
 		final int borderColor = flag ? 0xAA4444 : 0xAAAA44;
 		final int boxShadowColor = flag ? 0x440000 : 0x444400;
 		
-		int x = (getWidth() - width) / 2;
-		int y = getHeight() - height;
-		
-		y -= 2*border;
+		int x = (getWidth() - WIDTH) / 2;
+		int y = getHeight() - HEIGHT - 2*BORDER;
 
-		target.fill(x + border, y + border, width, height, boxShadowColor);
-		target.fill(x - 1, y - 1, width + 2, height + 2, boxShadowColor);
-		target.fill(x, y, width, height, borderColor);
-		target.fill(x + border, y + border, width - 2*border, height - 2*border, boxColor);
+		target.fill(x + BORDER, y + BORDER, WIDTH, HEIGHT, boxShadowColor);
+		target.fill(x - 1, y - 1, WIDTH + 2, HEIGHT + 2, boxShadowColor);
+		target.fill(x, y, WIDTH, HEIGHT, borderColor);
+		target.fill(x + BORDER, y + BORDER, WIDTH - 2*BORDER, HEIGHT - 2*BORDER, boxColor);
 		
 		final int texShadow = 2;
-		final int texSize = height - 4*border;
+		final int texSize = HEIGHT - 4*BORDER;
 		
-		target.fill(x + 2*border + texShadow, y + 2*border + texShadow, texSize, texSize, Colors.BLACK);
-		target.drawTexture(x + 2*border, y + 2*border, texSize, texSize, qtex("compass"));
+		target.pushTransform(new Mat4().identity().translate(x + 2*BORDER, y + 2*BORDER, 0));
+		
+		final Texture compassBg = qtex("compass_icon");
+		final Texture compassFg = qtex("compass_icon_arrow");
+		
+		target.drawTexture(texShadow, texShadow, texSize, texSize, Colors.BLACK, compassBg);
+		target.drawTexture(0, 0, texSize, texSize, compassBg);
+		
+		target.addCustomRenderer(new LambdaModel(LambdaModel.lambdaBuilder()
+				.addDynamicPart(
+						target.createRectagle(0, 0, texSize, texSize, 0xFFFFFF, compassFg),
+						mat -> mat.translate(texSize/2, texSize/2, 0).rotateZ(-LayerWorld.tmp_the_camera.getYaw()).translate(-texSize/2, -texSize/2, 0)
+				)
+		));
+		target.popTransform();
 		
 		drawCross(target);
 	}
-	
+
 	private void drawCross(RenderTarget target) {
 		int cx = getWidth() / 2;
 		int cy = getHeight() / 2;

src/main/java/ru/windcorp/optica/client/graphics/flat/Mask.java

@@ -65,6 +65,14 @@ public class Mask {
 		this.endY = endY;
 	}
 	
+	public int getWidth() {
+		return getEndX() - getStartX();
+	}
+	
+	public int getHeight() {
+		return getEndY() - getStartY();
+	}
+	
 	public void set(int startX, int startY, int endX, int endY) {
 		this.startX = startX;
 		this.startY = startY;
@@ -72,8 +80,14 @@ public class Mask {
 		this.endY = endY;
 	}
 	
-	public boolean isEmpty() {
-		return startX >= endX || startY >= endY;
+	public void set(Mask copyFrom) {
+		set(copyFrom.startX, copyFrom.startY, copyFrom.endX, copyFrom.endY);
+	}
+	
+	@Override
+	public String toString() {
+		return "(" + getStartX() + "; " + getStartY() +
+				") -> (" + getEndX() + "; " + getEndY() + ")";
 	}
 
 }

src/main/java/ru/windcorp/optica/client/graphics/flat/MaskStack.java

@@ -0,0 +1,46 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.flat;
+
+import java.nio.FloatBuffer;
+
+import org.lwjgl.BufferUtils;
+
+public class MaskStack {
+	
+	private final FloatBuffer buffer = BufferUtils.createFloatBuffer(
+			FlatRenderProgram.MASK_STACK_SIZE * TransformedMask.SIZE_IN_FLOATS
+	);
+	
+	public void pushMask(TransformedMask mask) {
+		mask.writeToBuffer(buffer);
+	}
+	
+	public void popMask() {
+		buffer.position(buffer.position() - TransformedMask.SIZE_IN_FLOATS);
+	}
+	
+	public void clear() {
+		buffer.clear();
+	}
+	
+	FloatBuffer getBuffer() {
+		return buffer;
+	}
+
+}

src/main/java/ru/windcorp/optica/client/graphics/flat/RenderTarget.java

@@ -21,7 +21,9 @@ import java.util.ArrayList;
 import java.util.Deque;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Objects;
 
+import glm.mat._4.Mat4;
 import glm.vec._3.Vec3;
 import ru.windcorp.optica.client.graphics.Colors;
 import ru.windcorp.optica.client.graphics.backend.Usage;
@@ -33,10 +35,53 @@ import ru.windcorp.optica.client.graphics.texture.Texture;
 
 public class RenderTarget {
 	
-	private final List<AssembledFlatLayer.Clip> assembled = new ArrayList<>();
+	private static final Mat4 IDENTITY = new Mat4().identity();
 	
-	private final Deque<Mask> maskStack = new LinkedList<>();
+	public static class Clip {
+		
+		private final MaskStack masks = new MaskStack();
+		private final Mat4 transform;
+		private final WorldRenderable renderable;
 	
+		public Clip(
+				Iterable<TransformedMask> masks,
+				Mat4 transform,
+				WorldRenderable renderable
+		) {
+			for (TransformedMask mask : masks) {
+				this.masks.pushMask(mask);
+			}
+			
+			this.transform = transform == null ? IDENTITY : transform;
+			this.renderable = Objects.requireNonNull(renderable, "renderable");
+		}
+		
+		public Mat4 getTransform() {
+			return transform;
+		}
+	
+		public WorldRenderable getRenderable() {
+			return renderable;
+		}
+		
+		public void render(AssembledFlatRenderHelper helper) {
+			helper.setMasks(masks.getBuffer());
+			helper.pushTransform().mul(getTransform());
+			
+			try {
+				getRenderable().render(helper);
+			} finally {
+				helper.popTransform();
+				helper.setMasks(null);
+			}
+		}
+		
+	}
+
+	private final List<Clip> assembled = new ArrayList<>();
+	
+	private final Deque<TransformedMask> maskStack = new LinkedList<>();
+	private final Deque<Mat4> transformStack = new LinkedList<>();
 	private final List<Face> currentClipFaces = new ArrayList<>();
 	
 	private int depth = 0;
@@ -45,20 +90,55 @@ public class RenderTarget {
 		reset();
 	}
 	
-	public void pushMaskStartEnd(int startX, int startY, int endX, int endY) {
-		assembleCurrentClipFromFaces();
-		maskStack.push(intersect(getMask(), startX, startY, endX, endY));
+	protected void assembleCurrentClipFromFaces() {
+		if (!currentClipFaces.isEmpty()) {
+			Face[] faces = currentClipFaces.toArray(
+					new Face[currentClipFaces.size()]
+			);
+			currentClipFaces.clear();
+			
+			Shape shape = new Shape(
+					Usage.STATIC, FlatRenderProgram.getDefault(), faces
+			);
+			
+			assembled.add(new Clip(
+					maskStack, getTransform(), shape
+			));
+		}
 	}
 	
-	private Mask intersect(
-			Mask current,
-			int startX, int startY, int endX, int endY
-	) {
-		return new Mask(
-				Math.max(startX, current.getStartX()),
-				Math.max(startY, current.getStartY()),
-				Math.min(endX, current.getEndX()),
-				Math.min(endY, current.getEndY())
+	public Clip[] assemble() {
+		assembleCurrentClipFromFaces();
+		
+		Clip[] result = assembled.toArray(
+				new Clip[assembled.size()]
+		);
+		
+		reset();
+		
+		return result;
+	}
+	
+	private void reset() {
+		maskStack.clear();
+		transformStack.clear();
+		currentClipFaces.clear();
+		assembled.clear();
+		
+		transformStack.add(new Mat4().identity());
+		depth = 0;
+	}
+	
+	public void pushMaskStartEnd(int startX, int startY, int endX, int endY) {
+		assembleCurrentClipFromFaces();
+		
+		pushTransform(new Mat4().identity().translate(startX, startY, 0));
+		
+		maskStack.push(
+				new TransformedMask(
+						new Mask(startX, startY, endX, endY),
+						getTransform()
+				)
 		);
 	}
 	
@@ -76,64 +156,32 @@ public class RenderTarget {
 	public void popMask() {
 		assembleCurrentClipFromFaces();
 		maskStack.pop();
+		popTransform();
 	}
 
-	public Mask getMask() {
+	public TransformedMask getMask() {
 		return maskStack.getFirst();
 	}
 	
-	protected void assembleCurrentClipFromFaces() {
-		if (!currentClipFaces.isEmpty()) {
-			
-			Mask mask = getMask();
-			if (mask.isEmpty()) {
-				currentClipFaces.clear();
-				return;
-			}
-			
-			Face[] faces = currentClipFaces.toArray(
-					new Face[currentClipFaces.size()]
-			);
-			currentClipFaces.clear();
-			
-			Shape shape = new Shape(
-					Usage.STATIC, FlatRenderProgram.getDefault(), faces
-			);
-			
-			assembled.add(new AssembledFlatLayer.Clip(mask, shape));
-		}
-	}
-	
-	public AssembledFlatLayer.Clip[] assemble() {
+	public void pushTransform(Mat4 transform) {
 		assembleCurrentClipFromFaces();
-		
-		AssembledFlatLayer.Clip[] result = assembled.toArray(
-				new AssembledFlatLayer.Clip[assembled.size()]
-		);
-		
-		reset();
-		
-		return result;
+		transformStack.push(getTransform().mul(transform, transform));
 	}
 	
-	private void reset() {
-		maskStack.clear();
-		currentClipFaces.clear();
-		assembled.clear();
-		
-		maskStack.add(new Mask(0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE));
-		depth = 0;
+	public void popTransform() {
+		assembleCurrentClipFromFaces();
+		transformStack.pop();
+	}
+
+	public Mat4 getTransform() {
+		return transformStack.getFirst();
 	}
 
 	public void addCustomRenderer(WorldRenderable renderable) {
 		assembleCurrentClipFromFaces();
-		
-		Mask mask = getMask();
-		if (mask.isEmpty()) {
-			return;
-		}
-		
-		assembled.add(new AssembledFlatLayer.Clip(mask, renderable));
+		assembled.add(new Clip(
+				maskStack, getTransform(), renderable
+		));
 	}
 	
 	protected void addFaceToCurrentClip(Face face) {
@@ -144,16 +192,9 @@ public class RenderTarget {
 			int x, int y, int width, int height,
 			int color, Texture texture
 	) {
-		float depth = this.depth--;
-		
-		addFaceToCurrentClip(Faces.createRectangle(
-				FlatRenderProgram.getDefault(),
-				texture,
-				createVectorFromRGBInt(color),
-				new Vec3(x, y + height, depth), // Flip
-				new Vec3(width, 0, 0),
-				new Vec3(0, -height, 0)
-		));
+		addFaceToCurrentClip(
+				createRectagleFace(x, y, width, height, color, texture)
+		);
 	}
 	
 	public void drawTexture(
@@ -170,6 +211,38 @@ public class RenderTarget {
 		drawTexture(x, y, width, height, color, null);
 	}
 	
+	public void fill(int color) {
+		fill(
+				Integer.MIN_VALUE / 2, Integer.MIN_VALUE / 2,
+				Integer.MAX_VALUE, Integer.MAX_VALUE,
+				color
+		);
+	}
+	
+	public Face createRectagleFace(
+			int x, int y, int width, int height, int color, Texture texture
+	) {
+		float depth = this.depth--;
+		
+		return Faces.createRectangle(
+				FlatRenderProgram.getDefault(),
+				texture,
+				createVectorFromRGBInt(color),
+				new Vec3(x, y + height, depth), // Flip
+				new Vec3(width, 0, 0),
+				new Vec3(0, -height, 0)
+		);
+	}
+	
+	public Shape createRectagle(
+			int x, int y, int width, int height, int color, Texture texture
+	) {
+		return new Shape(
+				Usage.STATIC, FlatRenderProgram.getDefault(),
+				createRectagleFace(x, y, width, height, color, texture)
+		);
+	}
+	
 	private static Vec3 createVectorFromRGBInt(int rgb) {
 		int r = (rgb & 0xFF0000) >> 16;
 		int g = (rgb & 0x00FF00) >> 8;

src/main/java/ru/windcorp/optica/client/graphics/flat/TransformedMask.java

@@ -0,0 +1,158 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.flat;
+
+import java.nio.FloatBuffer;
+
+import glm.mat._4.Mat4;
+import glm.vec._2.Vec2;
+import glm.vec._4.Vec4;
+import ru.windcorp.optica.client.graphics.backend.GraphicsInterface;
+
+public class TransformedMask {
+	
+	public static final int SIZE_IN_FLOATS = 2 * 3 * 2;
+	
+	private final Vec2 origin = new Vec2();
+	private final Vec2 width = new Vec2();
+	private final Vec2 height = new Vec2();
+	
+	private final Vec2 counterOrigin = new Vec2();
+	private final Vec2 counterWidth = new Vec2();
+	private final Vec2 counterHeight = new Vec2();
+	
+	// Temporary values, objects cached for efficiency
+	private Vec4 startXstartY = null;
+	private Vec4 startXendY = null;
+	private Vec4 endXstartY = null;
+	private Vec4 endXendY = null;
+	
+	public TransformedMask(
+			Vec2 origin, Vec2 width, Vec2 height,
+			Vec2 counterOrigin, Vec2 counterWidth, Vec2 counterHeight
+	) {
+		set(origin, width, height, counterOrigin, counterWidth, counterHeight);
+	}
+	
+	public TransformedMask(Mask mask, Mat4 transform) {
+		set(mask, transform);
+	}
+
+	public TransformedMask() {
+		// Do nothing
+	}
+	
+	public TransformedMask set(
+			Vec2 origin, Vec2 width, Vec2 height,
+			Vec2 counterOrigin, Vec2 counterWidth, Vec2 counterHeight
+	) {
+		this.origin.set(origin.x, origin.y);
+		this.width.set(width.x, width.y);
+		this.height.set(height.x, height.y);
+		this.counterOrigin.set(counterOrigin.x, counterOrigin.y);
+		this.counterWidth.set(counterWidth.x, counterWidth.y);
+		this.counterHeight.set(counterHeight.x, counterHeight.y);
+		
+		return this;
+	}
+	
+	public TransformedMask set(Mask mask, Mat4 transform) {
+		applyTransform(mask, transform);
+		setFields();
+		return this;
+	}
+
+	private void applyTransform(Mask mask, Mat4 transform) {
+		ensureTemporaryVariablesExist();
+		
+		int relX = mask.getWidth();
+		int relY = mask.getHeight();
+		
+		startXstartY.set(   0,    0, 0, 1);
+		startXendY  .set(   0, relY, 0, 1);
+		endXstartY  .set(relX,    0, 0, 1);
+		endXendY    .set(relX, relY, 0, 1);
+		
+		transform.mul(startXstartY);
+		transform.mul(startXendY);
+		transform.mul(endXstartY);
+		transform.mul(endXendY);
+
+		flipY();
+	}
+
+	private void ensureTemporaryVariablesExist() {
+		if (startXstartY == null) {
+			startXstartY = new Vec4();
+			startXendY = new Vec4();
+			endXstartY = new Vec4();
+			endXendY = new Vec4();
+		}
+	}
+
+	private void flipY() {
+		float height = GraphicsInterface.getFramebufferHeight();
+		
+		startXstartY.y = height - startXstartY.y;
+		startXendY.y = height - startXendY.y;
+		endXstartY.y = height - endXstartY.y;
+		endXendY.y = height - endXendY.y;
+	}
+
+	private void setFields() {
+		origin.set(
+				startXstartY.x,
+				startXstartY.y
+		);
+		
+		width.set(
+				endXstartY.x - startXstartY.x,
+				endXstartY.y - startXstartY.y
+		);
+		
+		height.set(
+				startXendY.x - startXstartY.x,
+				startXendY.y - startXstartY.y
+		);
+		
+		counterOrigin.set(
+				endXendY.x,
+				endXendY.y
+		);
+		
+		counterWidth.set(
+				startXendY.x - endXendY.x,
+				startXendY.y - endXendY.y
+		);
+		
+		counterHeight.set(
+				endXstartY.x - endXendY.x,
+				endXstartY.y - endXendY.y
+		);
+	}
+	
+	public void writeToBuffer(FloatBuffer output) {
+		output.put(origin.x).put(origin.y);
+		output.put(width.x).put(width.y);
+		output.put(height.x).put(height.y);
+		output.put(counterOrigin.x).put(counterOrigin.y);
+		output.put(counterWidth.x).put(counterWidth.y);
+		output.put(counterHeight.x).put(counterHeight.y);
+	}
+
+}

src/main/java/ru/windcorp/optica/client/graphics/input/WheelEvent.java

@@ -1,7 +1,25 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.input;
 
 public abstract class WheelEvent extends InputEvent {
 
     @Override
     public abstract WheelEvent snapshot();
+    
 }

src/main/java/ru/windcorp/optica/client/graphics/input/WheelScrollEvent.java

@@ -1,51 +1,86 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.input;
 
-import glm.vec._2.d.Vec2d;
-
 public class WheelScrollEvent extends WheelEvent {
 
-    protected double xoffset;
-    protected double yoffset;
+    protected double xOffset;
+    protected double yOffset;
 
-    protected WheelScrollEvent(double xoffset, double yoffset) {
-        this.xoffset = xoffset;
-        this.yoffset = yoffset;
+    protected WheelScrollEvent(double xOffset, double yOffset) {
+        this.xOffset = xOffset;
+        this.yOffset = yOffset;
     }
 
     protected WheelScrollEvent() {}
 
-    public boolean isUp() { return yoffset > 0; }
+    public boolean isUp() {
+    	return yOffset > 0;
+    }
 
-    public boolean isDown() { return yoffset < 0; }
+    public boolean isDown() {
+    	return yOffset < 0;
+    }
 
-    public boolean isRight() { return xoffset > 0; }
+    public boolean isRight() {
+    	return xOffset > 0;
+    }
 
-    public boolean isLeft() { return xoffset < 0; }
+    public boolean isLeft() {
+    	return xOffset < 0;
+    }
 
-    public boolean hasVerticalMovement() { return yoffset != 0; }
+    public boolean hasVerticalMovement() {
+    	return yOffset != 0;
+    }
 
-    public boolean hasHorizontalMovement() { return xoffset != 0; }
+    public boolean hasHorizontalMovement() {
+    	return xOffset != 0;
+    }
 
-    public double getX() { return xoffset; }
+    public double getX() {
+    	return xOffset;
+    }
 
-    public double getY() { return yoffset; }
+    public double getY() {
+    	return yOffset;
+    }
 
     @Override
     public WheelEvent snapshot() {
-        return new StaticWheelScrollEvent(xoffset, yoffset, getTime());
+        return new StaticWheelScrollEvent(xOffset, yOffset, getTime());
     }
 
     private class StaticWheelScrollEvent extends WheelScrollEvent {
 
         private final double time;
 
-        public StaticWheelScrollEvent(double xoffset, double yoffset, double time) {
-            super(xoffset, yoffset);
+        public StaticWheelScrollEvent(
+        		double xOffset, double yOffset, double time
+        ) {
+            super(xOffset, yOffset);
             this.time = time;
         }
 
         @Override
-        public double getTime() { return time; }
+        public double getTime() {
+        	return time;
+        }
 
         @Override
         public WheelEvent snapshot() {

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

@@ -0,0 +1,125 @@
+/*******************************************************************************
+ * Optica
+ * 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.optica.client.graphics.model;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import com.google.common.primitives.Booleans;
+
+import glm.mat._4.Mat4;
+
+public class LambdaModel extends DynamicModel {
+	
+	private static final Mat4 IDENTITY = new Mat4();
+	
+	@FunctionalInterface
+	public static interface TransformGetter {
+		void transform(Mat4 result);
+	}
+	
+	private final TransformGetter[] getters;
+	
+	public LambdaModel(
+			WorldRenderable[] parts,
+			Mat4[] transforms,
+			boolean[] dynamic,
+			TransformGetter[] getters
+	) {
+		super(parts, transforms, dynamic);
+		this.getters = getters;
+	}
+	
+	public LambdaModel(Builder builder) {
+		this(
+				builder.getParts(), builder.getTransforms(),
+				builder.getDynamics(), builder.getGetters()
+		);
+	}
+
+	@Override
+	protected void getDynamicTransform(int shapeIndex, Mat4 result) {
+		getters[shapeIndex].transform(result);
+	}
+	
+	public static Builder lambdaBuilder() {
+		return new Builder();
+	}
+	
+	public static class Builder {
+		
+		private final List<WorldRenderable> parts = new ArrayList<>();
+		private final List<Mat4> transforms = new ArrayList<>();
+		private final List<Boolean> dynamics = new ArrayList<>();
+		private final List<TransformGetter> getters = new ArrayList<>();
+		
+		protected Builder() {}
+		
+		private Builder addPart(
+				WorldRenderable part,
+				Mat4 transform,
+				TransformGetter getter
+		) {
+			parts.add(Objects.requireNonNull(part, "part"));
+			transforms.add(Objects.requireNonNull(transform, "transform"));
+			dynamics.add(getter != null);
+			getters.add(getter);
+			
+			return this;
+		}
+		
+		public Builder addStaticPart(
+				WorldRenderable part,
+				Mat4 transform
+		) {
+			return addPart(part, new Mat4(transform), null);
+		}
+		
+		public Builder addDynamicPart(
+				WorldRenderable part,
+				TransformGetter getter
+		) {
+			return addPart(part, new Mat4(), getter);
+		}
+		
+		public Builder addStaticPart(
+				WorldRenderable part
+		) {
+			return addStaticPart(part, IDENTITY);
+		}
+		
+		private WorldRenderable[] getParts() {
+			return parts.toArray(new WorldRenderable[parts.size()]);
+		}
+		
+		private Mat4[] getTransforms() {
+			return transforms.toArray(new Mat4[transforms.size()]);
+		}
+		
+		private boolean[] getDynamics() {
+			return Booleans.toArray(dynamics);
+		}
+		
+		private TransformGetter[] getGetters() {
+			return getters.toArray(new TransformGetter[getters.size()]);
+		}
+		
+	}
+
+}

src/main/java/ru/windcorp/optica/client/graphics/model/ShapeRenderHelper.java

@@ -24,7 +24,7 @@ public class ShapeRenderHelper {
 	
 	protected static final int TRANSFORM_STACK_SIZE = 64;
 	
-	private final StashingStack<Mat4> transformStack = new StashingStack<>(
+	protected final StashingStack<Mat4> transformStack = new StashingStack<>(
 			TRANSFORM_STACK_SIZE, Mat4::new
 	);
 	

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

@@ -35,6 +35,8 @@ import ru.windcorp.optica.common.world.WorldData;
 
 public class LayerWorld extends Layer {
 	
+	public static Camera tmp_the_camera;
+	
 	private final Camera camera = new Camera(
 			new Vec3(8, 8, 8),
 			0, 0,
@@ -59,6 +61,7 @@ public class LayerWorld extends Layer {
 
 	public LayerWorld() {
 		super("World");
+		tmp_the_camera = camera;
 	}
 	
 	@Override

src/main/java/ru/windcorp/optica/common/util/StashingStack.java

@@ -208,6 +208,26 @@ public class StashingStack<T> implements Iterable<T> {
 		return newElement;
 	}
 	
+	/**
+	 * Returns the specified element from the stack. Indexing starts from the
+	 * bottom of the stack. If the index is out of bounds, an
+	 * {@link IndexOutOfBoundsException} is thrown.
+	 * @param index index of the element to retrieve,
+	 * <tt>[0;&nbsp;{@link #getSize()})</tt>
+	 * @return the requested element
+	 * @throws IndexOutOfBoundsException if the index is negative or greater
+	 * than head
+	 */
+	public T get(int index) {
+		if (index > head) {
+			throw new IndexOutOfBoundsException(
+					"Requested index " + index + " > head " + head
+			);
+		}
+		
+		return (T) contents[index];
+	}
+	
 	/**
 	 * Removes all elements from the stack.
 	 */

src/main/resources/assets/shaders/Flat.fragment.glsl

@@ -1,13 +1,26 @@
-#version 120
+#version 140
 
-uniform ivec2 maskStart;
-uniform ivec2 maskEnd;
+uniform int maskCount;
+
+uniform vec2 masks[3 * 2 * 16];
+
+bool isInMaskPrimitive(int primitive) {
+	vec2 origin = masks[3 * primitive + 0];
+	vec2 width  = masks[3 * primitive + 1];
+	vec2 height = masks[3 * primitive + 2];
+	
+	vec2 current = gl_FragCoord.xy - origin;
+	
+	mat2 matrix = mat2(width, height);
+	vec2 relative = inverse(matrix) * current;
+	
+	return relative.x >= 0 && relative.y >= 0 && relative.x + relative.y <= 1;
+}
 
 void applyMask() {
-	if (
-			gl_FragCoord.x < maskStart.x || gl_FragCoord.x >= maskEnd.x ||
-			gl_FragCoord.y < maskStart.y || gl_FragCoord.y >= maskEnd.y
-	) {
-		discard;
+	for (int i = 0; i < maskCount; ++i) {
+		if (!(isInMaskPrimitive(2 * i + 0) || isInMaskPrimitive(2 * i + 1))) {
+			discard;
+		}
 	}
-}
+}

src/main/resources/assets/shaders/Flat.vertex.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 void flatTransferToFragment() {
 	shapeTransferToFragment();

src/main/resources/assets/shaders/FlatDefault.fragment.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 void main(void) {
 	applyTexture();

src/main/resources/assets/shaders/FlatDefault.vertex.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 void main(void) {
 	gl_Position = applyFinalTransform(vec4(inputPositions, 1.0));

src/main/resources/assets/shaders/Shape.fragment.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 varying vec3 varyingColorMultiplier;
 varying vec2 varyingTextureCoords;

src/main/resources/assets/shaders/Shape.vertex.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 attribute vec3 inputPositions;
 

src/main/resources/assets/shaders/World.fragment.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 varying vec3 varyingNormals;
 

src/main/resources/assets/shaders/World.vertex.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 attribute vec3 inputNormals;
 varying vec3 varyingNormals;

src/main/resources/assets/shaders/WorldDefault.fragment.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 void main(void) {
 	applyTexture();

src/main/resources/assets/shaders/WorldDefault.vertex.glsl

@@ -1,4 +1,4 @@
-#version 120
+#version 140
 
 void main(void) {
 	gl_Position = applyFinalTransform(vec4(inputPositions, 1.0));