world fog works, fluid fog still doesn't.

better dimension changes.

src/main/java/com/simibubi/create/events/ClientEvents.java

@@ -39,11 +39,13 @@ import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.ActiveRenderInfo;
 import net.minecraft.client.renderer.IRenderTypeBuffer;
 import net.minecraft.client.renderer.texture.OverlayTexture;
+import net.minecraft.client.world.ClientWorld;
 import net.minecraft.fluid.Fluid;
 import net.minecraft.fluid.IFluidState;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.text.ITextComponent;
+import net.minecraft.world.IWorld;
 import net.minecraft.world.World;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.client.event.EntityViewRenderEvent;
@@ -112,14 +114,20 @@ public class ClientEvents {
 
 	@SubscribeEvent
 	public static void onLoadWorld(WorldEvent.Load event) {
-		CreateClient.invalidateRenderers();
-		AnimationTickHolder.reset();
+		IWorld world = event.getWorld();
+		if (world.isRemote() && world instanceof ClientWorld) {
+			CreateClient.invalidateRenderers();
+			AnimationTickHolder.reset();
+			((ClientWorld) world).loadedTileEntityList.forEach(CreateClient.kineticRenderer::add);
+		}
 	}
 
 	@SubscribeEvent
 	public static void onUnloadWorld(WorldEvent.Unload event) {
-		CreateClient.invalidateRenderers();
-		AnimationTickHolder.reset();
+		if (event.getWorld().isRemote()) {
+			CreateClient.invalidateRenderers();
+			AnimationTickHolder.reset();
+		}
 	}
 
 	@SubscribeEvent

src/main/java/com/simibubi/create/foundation/mixin/RenderInLayerMixin.java

@@ -20,8 +20,8 @@ public class RenderInLayerMixin {
      * layer-correct custom rendering. RenderWorldLast is not refined enough for rendering world objects.
      * This should probably be a forge event.
      */
-    @Inject(at = @At("TAIL"), method = "renderLayer")
+    @Inject(at = @At(value = "INVOKE", target = "Lnet/minecraft/profiler/IProfiler;endSection()V", ordinal = 1), method = "renderLayer")
     private void renderLayer(RenderType type, MatrixStack stack, double cameraX, double cameraY, double cameraZ, CallbackInfo ci) {
-        FastRenderDispatcher.renderLayer(type, stack, cameraX, cameraY, cameraZ);
+        FastRenderDispatcher.renderLayer(type, stack, (float) cameraX, (float) cameraY, (float) cameraZ);
     }
 }

src/main/java/com/simibubi/create/foundation/render/FastRenderDispatcher.java

@@ -96,10 +96,10 @@ public class FastRenderDispatcher {
         }
     }
 
-    public static void renderLayer(RenderType type, MatrixStack stack, double cameraX, double cameraY, double cameraZ) {
+    public static void renderLayer(RenderType type, MatrixStack stack, float cameraX, float cameraY, float cameraZ) {
         if (!available()) return;
 
-        Matrix4f viewProjection = Matrix4f.translate((float) -cameraX, (float) -cameraY, (float) -cameraZ);
+        Matrix4f viewProjection = Matrix4f.translate(-cameraX, -cameraY, -cameraZ);
         viewProjection.multiplyBackward(stack.peek().getModel());
         viewProjection.multiplyBackward(getProjectionMatrix());
 
@@ -108,12 +108,13 @@ public class FastRenderDispatcher {
         RenderSystem.enableDepthTest();
         RenderSystem.enableCull();
         GL11.glCullFace(GL11.GL_BACK);
-        CreateClient.kineticRenderer.render(type, viewProjection);
+        CreateClient.kineticRenderer.render(type, viewProjection, cameraX, cameraY, cameraZ);
         RenderSystem.disableCull();
         //RenderSystem.disableDepthTest();
 
-        ContraptionRenderDispatcher.renderLayer(type, viewProjection);
-        GL20.glUseProgram(0);
+        ContraptionRenderDispatcher.renderLayer(type, viewProjection, cameraX, cameraY, cameraZ);
+        if (!OptifineHandler.usingShaders())
+            GL20.glUseProgram(0);
         type.endDrawing();
     }
 

src/main/java/com/simibubi/create/foundation/render/contraption/ContraptionRenderDispatcher.java

@@ -1,6 +1,7 @@
 package com.simibubi.create.foundation.render.contraption;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
+import com.mojang.blaze3d.platform.GlStateManager;
 import com.simibubi.create.content.contraptions.components.structureMovement.AbstractContraptionEntity;
 import com.simibubi.create.content.contraptions.components.structureMovement.AbstractContraptionEntityRenderer;
 import com.simibubi.create.content.contraptions.components.structureMovement.Contraption;
@@ -86,7 +87,7 @@ public class ContraptionRenderDispatcher {
         return renderer;
     }
 
-    public static void renderLayer(RenderType layer, Matrix4f viewProjection) {
+    public static void renderLayer(RenderType layer, Matrix4f viewProjection, float camX, float camY, float camZ) {
         removeDeadContraptions();
 
         if (renderers.isEmpty()) return;
@@ -96,13 +97,13 @@ public class ContraptionRenderDispatcher {
         GL13.glActiveTexture(GL40.GL_TEXTURE4); // the shaders expect light volumes to be in texture 4
 
         ContraptionProgram structureShader = Backend.getProgram(AllProgramSpecs.CONTRAPTION_STRUCTURE);
-        structureShader.bind(viewProjection, FastRenderDispatcher.getDebugMode());
+        structureShader.bind(viewProjection, camX, camY, camZ, FastRenderDispatcher.getDebugMode());
         for (RenderedContraption renderer : renderers.values()) {
             renderer.doRenderLayer(layer, structureShader);
         }
 
         for (RenderedContraption renderer : renderers.values()) {
-            renderer.kinetics.render(layer, viewProjection, renderer::setup);
+            renderer.kinetics.render(layer, viewProjection, camX, camY, camZ, renderer::setup);
             renderer.teardown();
         }
 

src/main/java/com/simibubi/create/foundation/render/gl/BasicProgram.java

@@ -12,6 +12,9 @@ public class BasicProgram extends GlProgram {
     protected final int uTime;
     protected final int uViewProjection;
     protected final int uDebug;
+    protected final int uCameraPos;
+    protected final int uFogRange;
+    protected final int uFogColor;
 
     protected int uBlockAtlas;
     protected int uLightMap;
@@ -22,6 +25,9 @@ public class BasicProgram extends GlProgram {
         uTime = getUniformLocation("uTime");
         uViewProjection = getUniformLocation("uViewProjection");
         uDebug = getUniformLocation("uDebug");
+        uCameraPos = getUniformLocation("uCameraPos");
+        uFogRange = getUniformLocation("uFogRange");
+        uFogColor = getUniformLocation("uFogColor");
 
         bind();
         registerSamplers();
@@ -33,13 +39,19 @@ public class BasicProgram extends GlProgram {
         uLightMap = setSamplerBinding("uLightMap", 2);
     }
 
-    public void bind(Matrix4f viewProjection, int debugMode) {
+    public void bind(Matrix4f viewProjection, float camX, float camY, float camZ, int debugMode) {
         super.bind();
 
+        GL20.glUniform1i(uDebug, debugMode);
         GL20.glUniform1i(uTicks, AnimationTickHolder.getTicks());
         GL20.glUniform1f(uTime, AnimationTickHolder.getRenderTick());
+
         uploadMatrixUniform(uViewProjection, viewProjection);
-        GL20.glUniform1i(uDebug, debugMode);
+        GL20.glUniform3f(uCameraPos, camX, camY, camZ);
+
+        GL20.glUniform2f(uFogRange, GlFog.getFogStart(), GlFog.getFogEnd());
+        GL20.glGetFloatv(GL20.GL_FOG_COLOR, Backend.VEC4_BUFFER);
+        GL20.glUniform4fv(uFogColor, Backend.VEC4_BUFFER);
     }
 
     protected static void uploadMatrixUniform(int uniform, Matrix4f mat) {

src/main/java/com/simibubi/create/foundation/render/gl/GlFog.java

@@ -0,0 +1,13 @@
+package com.simibubi.create.foundation.render.gl;
+
+import org.lwjgl.opengl.GL20;
+
+public class GlFog {
+    public static float getFogEnd() {
+        return GL20.glGetFloat(GL20.GL_FOG_END);
+    }
+
+    public static float getFogStart() {
+        return GL20.glGetFloat(GL20.GL_FOG_START);
+    }
+}

src/main/java/com/simibubi/create/foundation/render/gl/backend/Backend.java

@@ -33,7 +33,7 @@ import java.util.function.Predicate;
 public class Backend {
     public static final Logger log = LogManager.getLogger(Backend.class);
     public static final FloatBuffer FLOAT_BUFFER = MemoryUtil.memAllocFloat(1); // TODO: these leak 80 bytes of memory per program launch
-    public static final FloatBuffer VEC3_BUFFER = MemoryUtil.memAllocFloat(3);
+    public static final FloatBuffer VEC4_BUFFER = MemoryUtil.memAllocFloat(4);
     public static final FloatBuffer MATRIX_BUFFER = MemoryUtil.memAllocFloat(16);
 
     private static final Map<ResourceLocation, ProgramSpec<?>> registry = new HashMap<>();

src/main/java/com/simibubi/create/foundation/render/instancing/InstancedTileRenderer.java

@@ -108,14 +108,14 @@ public abstract class InstancedTileRenderer<P extends BasicProgram> {
         instances.clear();
     }
 
-    public void render(RenderType layer, Matrix4f viewProjection) {
-        render(layer, viewProjection, null);
+    public void render(RenderType layer, Matrix4f viewProjection, float camX, float camY, float camZ) {
+        render(layer, viewProjection, camX, camY, camZ, null);
     }
 
-    public void render(RenderType layer, Matrix4f viewProjection, ShaderCallback<P> callback) {
+    public void render(RenderType layer, Matrix4f viewProjection, float camX, float camY, float camZ, ShaderCallback<P> callback) {
         for (RenderMaterial<P, ?> material : materials.values()) {
             if (material.canRenderInLayer(layer))
-                material.render(layer, viewProjection, callback);
+                material.render(layer, viewProjection, camX, camY, camZ, callback);
         }
 
         GL20.glUseProgram(0);

src/main/java/com/simibubi/create/foundation/render/instancing/RenderMaterial.java

@@ -59,13 +59,13 @@ public class RenderMaterial<P extends BasicProgram, MODEL extends InstancedModel
         return layerPredicate.test(layer);
     }
 
-    public void render(RenderType layer, Matrix4f projection) {
-        render(layer, projection, null);
+    public void render(RenderType layer, Matrix4f projection, float camX, float camY, float camZ) {
+        render(layer, projection, camX, camY, camZ, null);
     }
 
-    public void render(RenderType layer, Matrix4f viewProjection, ShaderCallback<P> setup) {
+    public void render(RenderType layer, Matrix4f viewProjection, float camX, float camY, float camZ, ShaderCallback<P> setup) {
         P program = Backend.getProgram(programSpec);
-        program.bind(viewProjection, FastRenderDispatcher.getDebugMode());
+        program.bind(viewProjection, camX, camY, camZ, FastRenderDispatcher.getDebugMode());
 
         if (setup != null) setup.call(program);
 

src/main/resources/assets/create/shader/belt.vert

@@ -33,6 +33,8 @@ uniform float uTime;
 uniform mat4 uViewProjection;
 uniform int uDebug;
 
+uniform vec3 uCameraPos;
+out float FragDistance;
 
 mat4 rotate(vec3 axis, float angle) {
     float s = sin(angle);
@@ -83,6 +85,7 @@ void main() {
     Diffuse = diffuse(norm);
     TexCoords = aTexCoords - sourceTexture + scrollTexture.xy + vec2(0, scroll);
     Light = light;
+    FragDistance = length(worldPos.xyz - uCameraPos);
     gl_Position = uViewProjection * worldPos;
 
     #ifdef CONTRAPTION

src/main/resources/assets/create/shader/contraption.frag

@@ -4,11 +4,15 @@ in vec2 TexCoords;
 in vec4 Color;
 in float Diffuse;
 in vec2 Light;
+in float FragDistance;
 
 in vec3 BoxCoord;
 
 out vec4 fragColor;
 
+uniform vec2 uFogRange;
+uniform vec4 uFogColor;
+
 uniform sampler2D uBlockAtlas;
 uniform sampler2D uLightMap;
 uniform sampler3D uLightVolume;
@@ -21,5 +25,11 @@ vec4 light() {
 void main() {
     vec4 tex = texture2D(uBlockAtlas, TexCoords);
 
-    fragColor = vec4(tex.rgb * light().rgb * Diffuse * Color.rgb, tex.a);
+    vec4 color = vec4(tex.rgb * light().rgb * Diffuse * Color.rgb, tex.a);
+
+    float fog = (uFogRange.y - FragDistance) / (uFogRange.y - uFogRange.x);
+    fog = clamp(fog, 0, 1);
+
+    fragColor = mix(uFogColor, color, fog);
+    fragColor.a = color.a;
 }

src/main/resources/assets/create/shader/contraption_actor.vert

@@ -31,6 +31,8 @@ uniform float uTime;
 uniform mat4 uViewProjection;
 uniform int uDebug;
 
+uniform vec3 uCameraPos;
+out float FragDistance;
 
 mat4 rotate(vec3 axis, float angle) {
     float s = sin(angle);
@@ -79,6 +81,7 @@ void main() {
     Diffuse = diffuse(norm);
     TexCoords = aTexCoords;
     Light = modelLight;
+    FragDistance = length(worldPos.xyz - uCameraPos);
     gl_Position = uViewProjection * worldPos;
 
     if (uDebug == 2) {

src/main/resources/assets/create/shader/contraption_structure.vert

@@ -22,6 +22,9 @@ uniform float uTime;
 uniform mat4 uViewProjection;
 uniform int uDebug;
 
+uniform vec3 uCameraPos;
+out float FragDistance;
+
 mat4 rotate(vec3 axis, float angle) {
     float s = sin(angle);
     float c = cos(angle);
@@ -50,6 +53,7 @@ void main() {
     Color = aColor / diffuse(aNormal);
     TexCoords = aTexCoords;
     Light = modelLight;
+    FragDistance = length(worldPos.xyz - uCameraPos);
     gl_Position = uViewProjection * worldPos;
 
     if (uDebug == 2) {

src/main/resources/assets/create/shader/instanced.frag

@@ -4,9 +4,13 @@ in vec2 TexCoords;
 in vec2 Light;
 in float Diffuse;
 in vec4 Color;
+in float FragDistance;
 
 out vec4 fragColor;
 
+uniform vec2 uFogRange;
+uniform vec4 uFogColor;
+
 uniform sampler2D uBlockAtlas;
 uniform sampler2D uLightMap;
 
@@ -18,5 +22,11 @@ vec4 light() {
 void main() {
     vec4 tex = texture2D(uBlockAtlas, TexCoords);
 
-    fragColor = vec4(tex.rgb * light().rgb * Diffuse, tex.a) * Color;
+    vec4 color = vec4(tex.rgb * light().rgb * Diffuse, tex.a) * Color;
+
+    float fog = (uFogRange.y - FragDistance) / (uFogRange.y - uFogRange.x);
+    fog = clamp(fog, 0, 1);
+
+    fragColor = mix(uFogColor, color, fog);
+    fragColor.a = color.a;
 }

src/main/resources/assets/create/shader/rotating.vert

@@ -29,6 +29,9 @@ uniform float uTime;
 uniform mat4 uViewProjection;
 uniform int uDebug;
 
+uniform vec3 uCameraPos;
+out float FragDistance;
+
 mat4 rotate(vec3 axis, float angle) {
     float s = sin(angle);
     float c = cos(angle);
@@ -77,6 +80,7 @@ void main() {
     Diffuse = diffuse(norm);
     TexCoords = aTexCoords;
     Light = light;
+    FragDistance = length(worldPos.xyz - uCameraPos);
     gl_Position = uViewProjection * worldPos;
 
     #ifdef CONTRAPTION