From ba2d84e92e556f4735a742467c49fee3d3ad4e9f Mon Sep 17 00:00:00 2001
From: JozsefA <jozsefaug@gmail.com>
Date: Thu, 7 Jan 2021 02:48:24 -0800
Subject: [PATCH] whoops

---
 .../render/FastContraptionRenderer.java       | 144 ++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 src/main/java/com/simibubi/create/foundation/utility/render/FastContraptionRenderer.java

diff --git a/src/main/java/com/simibubi/create/foundation/utility/render/FastContraptionRenderer.java b/src/main/java/com/simibubi/create/foundation/utility/render/FastContraptionRenderer.java
new file mode 100644
index 000000000..c246c854a
--- /dev/null
+++ b/src/main/java/com/simibubi/create/foundation/utility/render/FastContraptionRenderer.java
@@ -0,0 +1,144 @@
+package com.simibubi.create.foundation.utility.render;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.mojang.blaze3d.platform.GlStateManager;
+import com.simibubi.create.CreateClient;
+import com.simibubi.create.content.contraptions.components.structureMovement.Contraption;
+import com.simibubi.create.content.contraptions.components.structureMovement.ContraptionRenderer;
+import com.simibubi.create.foundation.utility.render.shader.Shader;
+import com.simibubi.create.foundation.utility.render.shader.ShaderHelper;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.*;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.World;
+import net.minecraftforge.client.event.RenderWorldLastEvent;
+import org.lwjgl.opengl.GL13;
+import org.lwjgl.opengl.GL40;
+
+import java.nio.FloatBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ExecutionException;
+
+public class FastContraptionRenderer extends ContraptionRenderer {
+
+    private static final Cache<Contraption, FastContraptionRenderer> renderers = CacheBuilder.newBuilder().build();
+
+    private ArrayList<ContraptionBuffer> renderLayers = new ArrayList<>();
+
+    private ContraptionLighter lighter;
+
+    private Contraption c;
+
+    private Vec3d renderPos;
+    private Vec3d renderRot;
+
+    public FastContraptionRenderer(World world, Contraption c) {
+        this.c = c;
+        this.lighter = new ContraptionLighter(c);
+
+        buildLayers();
+    }
+
+    private void setRenderSettings(Vec3d position, Vec3d rotation) {
+        renderPos = position;
+        renderRot = rotation;
+    }
+
+    private void render(int shader) {
+//        GL13.glActiveTexture(GL40.GL_TEXTURE2);
+//        lighter.use();
+
+        int cSize = GlStateManager.getUniformLocation(shader, "cSize");
+        int cPos = GlStateManager.getUniformLocation(shader, "cPos");
+        int cRot = GlStateManager.getUniformLocation(shader, "cRot");
+
+        FloatBuffer buf = ShaderHelper.VEC3_BUFFER;
+
+        buf.put(0, (float) c.bounds.getXSize());
+        buf.put(1, (float) c.bounds.getYSize());
+        buf.put(2, (float) c.bounds.getZSize());
+        buf.rewind();
+        GlStateManager.uniform3(cSize, buf);
+
+        buf.put(0, (float) renderPos.x);
+        buf.put(1, (float) renderPos.y);
+        buf.put(2, (float) renderPos.z);
+        buf.rewind();
+        GlStateManager.uniform3(cPos, buf);
+
+        buf.put(0, (float) renderRot.x);
+        buf.put(1, (float) renderRot.y);
+        buf.put(2, (float) renderRot.z);
+        buf.rewind();
+        GlStateManager.uniform3(cRot, buf);
+
+        for (ContraptionBuffer layer : renderLayers) {
+            layer.render();
+        }
+    }
+
+    private void buildLayers() {
+        invalidate();
+
+        List<RenderType> blockLayers = RenderType.getBlockLayers();
+
+        for (int i = 0; i < blockLayers.size(); i++) {
+            RenderType layer = blockLayers.get(i);
+            renderLayers.add(buildStructureBuffer(c, layer));
+        }
+    }
+
+    private void invalidate() {
+        for (ContraptionBuffer buffer : renderLayers) {
+            buffer.invalidate();
+        }
+
+        renderLayers.clear();
+    }
+
+    public static void markForRendering(World world, Contraption c, Vec3d position, Vec3d rotation) {
+        getRenderer(world, c).setRenderSettings(position, rotation);
+    }
+
+    private static FastContraptionRenderer getRenderer(World world, Contraption c) {
+        try {
+            return renderers.get(c, () -> new FastContraptionRenderer(world, c));
+        } catch (ExecutionException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public static void renderAll(RenderWorldLastEvent event) {
+        GameRenderer gameRenderer = Minecraft.getInstance().gameRenderer;
+        CreateClient.kineticRenderer.setup(gameRenderer);
+        GlStateManager.enableCull();
+
+        ShaderHelper.useShader(Shader.CONTRAPTION_STRUCTURE, ShaderHelper.getViewProjectionCallback(event));
+        int shader = ShaderHelper.getShaderHandle(Shader.CONTRAPTION_STRUCTURE);
+
+        for (FastContraptionRenderer renderer : renderers.asMap().values()) {
+            renderer.render(shader);
+        }
+
+        ShaderHelper.releaseShader();
+
+        CreateClient.kineticRenderer.teardown();
+    }
+
+    public static void invalidateAll() {
+        for (FastContraptionRenderer renderer : renderers.asMap().values()) {
+            renderer.invalidate();
+        }
+
+        renderers.invalidateAll();
+    }
+
+    private static ContraptionBuffer buildStructureBuffer(Contraption c, RenderType layer) {
+        BufferBuilder builder = buildStructure(c, layer);
+        return new ContraptionBuffer(builder);
+    }
+}