Separate rendering into its own module

src/main/java/com/replaymod/render/hooks/EntityRendererHandler.java

@@ -0,0 +1,82 @@
+package com.replaymod.render.hooks;
+
+import com.replaymod.render.RenderSettings;
+import com.replaymod.render.capturer.CaptureData;
+import com.replaymod.render.capturer.WorldRenderer;
+import lombok.Getter;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.culling.ClippingHelper;
+import org.lwjgl.util.ReadableDimension;
+
+import java.io.IOException;
+
+import static net.minecraft.client.renderer.GlStateManager.*;
+
+public class EntityRendererHandler implements WorldRenderer {
+    public final Minecraft mc = Minecraft.getMinecraft();
+
+    @Getter
+    protected final RenderSettings settings;
+
+    public CaptureData data;
+
+    public EntityRendererHandler(RenderSettings settings) {
+        this.settings = settings;
+
+        ((IEntityRenderer) mc.entityRenderer).replayModRender_setHandler(this);
+    }
+
+    public void withDisplaySize(int displayWidth, int displayHeight, Runnable runnable) {
+        final int prevWidth = mc.displayWidth;
+        final int prevHeight = mc.displayHeight;
+        mc.displayWidth = displayWidth;
+        mc.displayHeight = displayHeight;
+
+        runnable.run();
+
+        mc.displayWidth = prevWidth;
+        mc.displayHeight = prevHeight;
+    }
+
+    @Override
+    public void renderWorld(ReadableDimension displaySize, final float partialTicks, CaptureData data) {
+        this.data = data;
+        withDisplaySize(displaySize.getWidth(), displaySize.getHeight(), new Runnable() {
+            @Override
+            public void run() {
+                renderWorld(partialTicks, 0);
+            }
+        });
+    }
+
+    public void renderWorld(float partialTicks, long finishTimeNano) {
+        mc.entityRenderer.updateLightmap(partialTicks);
+
+        enableDepth();
+        enableAlpha();
+        alphaFunc(516, 0.5F);
+
+        mc.entityRenderer.renderWorldPass(2, partialTicks, finishTimeNano);
+    }
+
+    @Override
+    public void close() throws IOException {
+        ((IEntityRenderer) mc.entityRenderer).replayModRender_setHandler(null);
+    }
+
+    public static final class NoCullingClippingHelper extends ClippingHelper {
+        @Override
+        public boolean isBoxInFrustum(double p_78553_1_, double p_78553_3_, double p_78553_5_, double p_78553_7_, double p_78553_9_, double p_78553_11_) {
+            return true;
+        }
+    }
+
+    public interface GluPerspective {
+        void replayModRender_gluPerspective(float fovY, float aspect, float zNear, float zFar);
+    }
+
+    public interface IEntityRenderer {
+        void replayModRender_setHandler(EntityRendererHandler handler);
+        EntityRendererHandler replayModRender_getHandler();
+    }
+}