Added face culling state stack and disabled face culling for entities

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

@@ -26,8 +26,10 @@ public class TestEntityRenderJavapony extends EntityRender {
 
 	private final Renderable body;
 	private final Renderable head;
-	private final Renderable foreLeg;
-	private final Renderable hindLeg;
+	private final Renderable leftForeLeg;
+	private final Renderable leftHindLeg;
+	private final Renderable rightForeLeg;
+	private final Renderable rightHindLeg;
 
 	public TestEntityRenderJavapony() {
 		super("Test", "Javapony");
@@ -39,8 +41,10 @@ public class TestEntityRenderJavapony extends EntityRender {
 		
 		this.body = createBody(texture);
 		this.head = createHead(texture);
-		this.foreLeg = createForeLeg(texture);
-		this.hindLeg = createHindLeg(texture);
+		this.leftForeLeg = createLeg(texture, 160, 0, true);
+		this.rightForeLeg = createLeg(texture, 160, 0, false);
+		this.leftHindLeg = createLeg(texture, 0, 0, true);
+		this.rightHindLeg = createLeg(texture, 0, 0, false);
 	}
 	
 	private static Renderable createBody(ComplexTexture texture) {
@@ -75,7 +79,7 @@ public class TestEntityRenderJavapony extends EntityRender {
 						)
 				)
 					.setOrigin(0, -8, 8)
-					.setWidth(16).setDepth(16).setHeight(4, 0, 16)
+					.setWidth(16).setDepth(16).setHeight(2, 0, 16)
 					.create()
 		);
 		
@@ -243,7 +247,7 @@ public class TestEntityRenderJavapony extends EntityRender {
 		// Left ear
 		b.addPart(new PppBuilder(
 				program, texture.getCuboidTextures(48, 128-80, 8)
-		).setOrigin(-16 + 3, 16 - 8, 32).setSize(8).create());
+		).setOrigin(-16 + 3, +16, 32).setSize(8, -8, 8).flip().create());
 		
 		// Muzzle
 		b.addPart(new PppBuilder(
@@ -255,7 +259,7 @@ public class TestEntityRenderJavapony extends EntityRender {
 					texture.get(32, 64, 0, 0),
 					texture.get(32, 64, 0, 0)
 				)
-		).setOrigin(16, -8, 0).setSize(16, 4, 8).create());
+		).setOrigin(16, -8, 0).setSize(4, 16, 8).create());
 		
 		// Nose
 		b.addPart(new PppBuilder(
@@ -267,23 +271,26 @@ public class TestEntityRenderJavapony extends EntityRender {
 					texture.get(32, 64, 0, 0),
 					texture.get(32, 64, 0, 0)
 				)
-		).setOrigin(16, -4, 8).setSize(8, 4, 4).create());
+		).setOrigin(16, -4, 8).setSize(4, 8, 4).create());
 		
 		return new StaticModel(b);
 	}
 	
-	private static Renderable createForeLeg(ComplexTexture texture) {
-		return new PppBuilder(
+	private static Renderable createLeg(
+			ComplexTexture texture,
+			int textureX, int textureY,
+			boolean isLeft
+	) {
+		PppBuilder b = new PppBuilder(
 				WorldRenderProgram.getDefault(),
-				texture.getCuboidTextures(160, 0, 16, 48, 16)
-		).setOrigin(-8, -8, -48).setSize(16, 16, 48).create();
-	}
+				texture.getCuboidTextures(textureX, textureY, 16, 48, 16)
+		)
+		.setOrigin(-8, isLeft ? +8 : -8, -48)
+		.setSize(16, isLeft ? -16 : +16, 48);
 		
-	private static Renderable createHindLeg(ComplexTexture texture) {
-		return new PppBuilder(
-				WorldRenderProgram.getDefault(),
-				texture.getCuboidTextures(0, 0, 16, 48, 16)
-		).setOrigin(-8, -8, -48).setSize(16, 16, 48).create();
+		if (isLeft) b.flip();
+		
+		return b.create();
 	}
 
 	private static Renderable createTail(ComplexTexture texture) {
@@ -312,12 +319,21 @@ public class TestEntityRenderJavapony extends EntityRender {
 				
 				new QuadripedModel.Body(body),
 				new QuadripedModel.Head(
-						head, new Vec3(16, 0, 20), 60, 45
+						head, new Vec3(12, 0, 20), 60, 45
 				),
-				new QuadripedModel.Leg(foreLeg, new Vec3(  6, +8.1f, -16), 0.0f),
-				new QuadripedModel.Leg(foreLeg, new Vec3(  6, -8.1f, -16), 2.5f),
-				new QuadripedModel.Leg(hindLeg, new Vec3(-36, +8.2f, -16), 2.5f),
-				new QuadripedModel.Leg(hindLeg, new Vec3(-36, -8.2f, -16), 0.0f),
+				new QuadripedModel.Leg(
+						leftForeLeg, new Vec3(  6, +8.1f, -16), 0.0f
+				),
+				new QuadripedModel.Leg(
+						rightForeLeg, new Vec3(  6, -8.1f, -16), 2.5f
+				),
+				new QuadripedModel.Leg(
+						leftHindLeg, new Vec3(-36, +8.2f, -16), 2.5f
+				),
+				new QuadripedModel.Leg(
+						rightHindLeg, new Vec3(-36, -8.2f, -16), 0.0f
+				),
+				
 				1 / 96f
 		);
 	}

src/main/java/ru/windcorp/progressia/client/graphics/backend/FaceCulling.java

@@ -0,0 +1,27 @@
+package ru.windcorp.progressia.client.graphics.backend;
+
+import java.util.ArrayDeque;
+import java.util.Deque;
+
+public class FaceCulling {
+	
+	private static final Deque<Boolean> STACK = new ArrayDeque<>();
+	
+	public static void push(boolean useFaceCulling) {
+		GraphicsBackend.setFaceCulling(useFaceCulling);
+		STACK.push(Boolean.valueOf(useFaceCulling));
+	}
+	
+	public static void pop() {
+		STACK.pop();
+		
+		if (STACK.isEmpty()) {
+			GraphicsBackend.setFaceCulling(false);
+		} else {
+			GraphicsBackend.setFaceCulling(STACK.getFirst());
+		}
+	}
+	
+	private FaceCulling() {}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/backend/GraphicsBackend.java

@@ -35,6 +35,8 @@ public class GraphicsBackend {
 	private static long framesRendered = 0;
 	private static double frameStart = Double.NaN;
 	
+	private static boolean faceCullingEnabled = false;
+	
 	private GraphicsBackend() {}
 	
 	public static void initialize() {
@@ -110,4 +112,16 @@ public class GraphicsBackend {
 		glClear(GL_DEPTH_BUFFER_BIT);
 	}
 	
+	public static void setFaceCulling(boolean useFaceCulling) {
+		if (useFaceCulling == faceCullingEnabled) return;
+		
+		if (useFaceCulling) {
+			glEnable(GL_CULL_FACE);
+		} else {
+			glDisable(GL_CULL_FACE);
+		}
+		
+		faceCullingEnabled = useFaceCulling;
+	}
+
 }

src/main/java/ru/windcorp/progressia/client/graphics/backend/LWJGLInitializer.java

@@ -81,7 +81,6 @@ class LWJGLInitializer {
 	private static void initializeOpenGL() {
 		GL.createCapabilities();
 		glEnable(GL_DEPTH_TEST);
-		glEnable(GL_CULL_FACE);
 		glEnable(GL_BLEND);
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	}

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

@@ -18,6 +18,7 @@
 package ru.windcorp.progressia.client.graphics.flat;
 
 import ru.windcorp.progressia.client.graphics.Layer;
+import ru.windcorp.progressia.client.graphics.backend.FaceCulling;
 
 public abstract class AssembledFlatLayer extends Layer {
 
@@ -48,11 +49,15 @@ public abstract class AssembledFlatLayer extends Layer {
 	
 	@Override
 	protected void doRender() {
+		FaceCulling.push(false);
+		
 		for (RenderTarget.Clip clip : clips) {
 			clip.render(helper);
 		}
 		
 		helper.reset();
+		
+		FaceCulling.pop();
 	}
 	
 }

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

@@ -17,8 +17,6 @@
  *******************************************************************************/
 package ru.windcorp.progressia.client.graphics.flat;
 
-import static org.lwjgl.opengl.GL11.*;
-
 import java.nio.FloatBuffer;
 
 import com.google.common.collect.ObjectArrays;
@@ -81,9 +79,7 @@ public class FlatRenderProgram extends ShapeRenderProgram {
 	
 	@Override
 	public void render(ShapeRenderHelper helper, Shape shape) {
-		glDisable(GL_CULL_FACE);
 		super.render(helper, shape);
-		glEnable(GL_CULL_FACE);
 	}
 	
 	@Override

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

@@ -43,7 +43,9 @@ public class Shapes {
 			Texture northTexture,
 			Texture southTexture,
 			Texture eastTexture,
-			Texture westTexture
+			Texture westTexture,
+			
+			boolean flip
 	) {
 		
 		Vec3 faceOrigin = Vectors.grab3();
@@ -55,7 +57,7 @@ public class Shapes {
 				faceOrigin.set(origin).add(height).add(width),
 				faceWidth.set(width).negate(),
 				depth,
-				false
+				flip
 		);
 		
 		Face bottom = Faces.createRectangle(
@@ -64,7 +66,7 @@ public class Shapes {
 				origin,
 				width,
 				depth,
-				false
+				flip
 		);
 		
 		Face north = Faces.createRectangle(
@@ -73,7 +75,7 @@ public class Shapes {
 				faceOrigin.set(origin).add(depth),
 				width,
 				height,
-				false
+				flip
 		);
 		
 		Face south = Faces.createRectangle(
@@ -82,7 +84,7 @@ public class Shapes {
 				faceOrigin.set(origin).add(width),
 				faceWidth.set(width).negate(),
 				height,
-				false
+				flip
 		);
 		
 		Face east = Faces.createRectangle(
@@ -91,7 +93,7 @@ public class Shapes {
 				origin,
 				depth,
 				height,
-				false
+				flip
 		);
 		
 		Face west = Faces.createRectangle(
@@ -100,7 +102,7 @@ public class Shapes {
 				faceOrigin.set(origin).add(width).add(depth),
 				faceWidth.set(depth).negate(),
 				height,
-				false
+				flip
 		);
 		
 		Shape result = new Shape(
@@ -134,6 +136,8 @@ public class Shapes {
 		private final Texture eastTexture;
 		private final Texture westTexture;
 		
+		private boolean flip = false;
+		
 		public PppBuilder(
 				ShapeRenderProgram program,
 				Texture top,
@@ -237,13 +241,18 @@ public class Shapes {
 		}
 		
 		public PppBuilder setSize(float x, float y, float z) {
-			return this.setWidth(x).setDepth(y).setHeight(z);
+			return this.setDepth(x).setWidth(y).setHeight(z);
 		}
 		
 		public PppBuilder setSize(float size) {
 			return this.setSize(size, size, size);
 		}
 		
+		public PppBuilder flip() {
+			this.flip = true;
+			return this;
+		}
+		
 		public Shape create() {
 			return createParallelepiped(
 					program,
@@ -255,7 +264,8 @@ public class Shapes {
 					northTexture,
 					southTexture,
 					eastTexture,
-					westTexture
+					westTexture,
+					flip
 			);
 		}
 		

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

@@ -24,6 +24,7 @@ import glm.vec._3.Vec3;
 import ru.windcorp.progressia.client.Client;
 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;
@@ -102,7 +103,9 @@ public class LayerWorld extends Layer {
 	}
 
 	private void renderWorld() {
+		FaceCulling.push(true);
 		this.client.getWorld().render(helper);
+		FaceCulling.pop();
 	}
 	
 	@Override

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

@@ -92,12 +92,6 @@ public class ChunkRender {
 		model.render(renderer);
 		
 		renderer.popTransform();
-		
-		getData().forEachEntity(entityData -> {
-				renderer.pushTransform().translate(entityData.getPosition());
-				getWorld().getEntityRenderable(entityData).render(renderer);
-				renderer.popTransform();
-		});
 	}
 
 	private void buildModel() {

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

@@ -24,6 +24,7 @@ import java.util.Map;
 import java.util.WeakHashMap;
 
 import glm.vec._3.i.Vec3i;
+import ru.windcorp.progressia.client.graphics.backend.FaceCulling;
 import ru.windcorp.progressia.client.graphics.model.Renderable;
 import ru.windcorp.progressia.client.graphics.model.ShapeRenderHelper;
 import ru.windcorp.progressia.client.world.entity.EntityRenderRegistry;
@@ -67,6 +68,22 @@ public class WorldRender {
 		for (ChunkRender chunk : getChunks()) {
 			chunk.render(renderer);
 		}
+		
+		renderEntities(renderer);
+	}
+	
+	private void renderEntities(ShapeRenderHelper renderer) {
+		FaceCulling.push(false);
+		
+		for (ChunkRender chunk : getChunks()) {
+			chunk.getData().forEachEntity(entity -> {
+					renderer.pushTransform().translate(entity.getPosition());
+					getEntityRenderable(entity).render(renderer);
+					renderer.popTransform();
+			});
+		}
+		
+		FaceCulling.pop();
 	}
 
 	public Renderable getEntityRenderable(EntityData entity) {

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

@@ -99,6 +99,11 @@ public class QuadripedModel implements Renderable {
 	private float velocityCoeff = 0;
 	private float velocity = 0;
 	
+	/**
+	 * Controls how quickly velocityCoeff approaches 1
+	 */
+	private float velocityCutoff = 10;
+	
 	private float walkingFrequency = 0.15f;
 	private float walkingSwing = (float) toRadians(30);
 	
@@ -129,8 +134,8 @@ public class QuadripedModel implements Renderable {
 	
 	@Override
 	public void render(ShapeRenderHelper renderer) {
-		evaluateAngles();
 		accountForVelocity();
+		evaluateAngles();
 		
 		renderer.pushTransform().scale(scale).rotateZ(bodyYaw);
 		body.render(renderer, this);
@@ -171,13 +176,15 @@ public class QuadripedModel implements Renderable {
 	}
 
 	private void accountForVelocity() {
-		// TODO switch to world time
 		Vec3 horizontal = Vectors.grab3();
 		horizontal.set(entity.getVelocity());
 		horizontal.z = 0;
 		
-		velocity = (float) (horizontal.length());
-		velocityCoeff = -1 / (velocity * 1000 + 1) + 1;
+		velocity = horizontal.length();
+		
+		evaluateVelocityCoeff();
+		
+		// TODO switch to world time
 		walkingAnimationParameter += velocity * GraphicsInterface.getFrameLength() * 1000;
 		
 		bodyYaw += velocityCoeff * normalizeAngle(
@@ -186,6 +193,15 @@ public class QuadripedModel implements Renderable {
 		Vectors.release(horizontal);
 	}
 	
+	private void evaluateVelocityCoeff() {
+		if (velocity * velocityCutoff > 1) {
+			velocityCoeff = 1;
+		} else {
+			velocityCoeff = velocity * velocityCutoff;
+			velocityCoeff *= velocityCoeff;
+		}
+	}
+
 	private static float normalizeAngle(float x) {
 		final float half = (float) (PI);
 		final float full = (float) (2 * PI);