Fix camera position off-by-one with immersive portals

common/src/main/java/com/seibel/distanthorizons/common/render/openGl/generic/GlGenericObjectRenderer.java

@@ -450,8 +450,6 @@ public class GlGenericObjectRenderer implements IDhGenericRenderer
 			
 			this.boxIndexBuffer.bind();
 			
-			DhVec3d camPos = MC_RENDER.getCameraExactPosition();
-			
 			
 			
 			// rendering //
@@ -512,11 +510,11 @@ public class GlGenericObjectRenderer implements IDhGenericRenderer
 				{
 					if (this.instancedRenderingAvailable)
 					{
-						this.renderBoxGroupInstanced(shaderProgram, renderEventParam, boxGroup, camPos, profiler);
+						this.renderBoxGroupInstanced(shaderProgram, renderEventParam, boxGroup, renderEventParam.exactCameraPosition, profiler);
 					}
 					else
 					{
-						this.renderBoxGroupDirect(shaderProgram, renderEventParam, boxGroup, camPos, profiler);
+						this.renderBoxGroupDirect(shaderProgram, renderEventParam, boxGroup, renderEventParam.exactCameraPosition, profiler);
 					}
 				}
 				

common/src/main/java/com/seibel/distanthorizons/common/render/openGl/postProcessing/fog/GlDhFogShader.java

@@ -208,7 +208,7 @@ public class GlDhFogShader extends GlAbstractShaderRenderer
 		this.shader.setUniform(this.uHeightFogAppliesDown, heightFogDirection.fogAppliesDown);
 		this.shader.setUniform(this.uUseSphericalFog, useSphericalFog);
 		this.shader.setUniform(this.uHeightFogMixingMode, heightFogMixingMode.value);
-		this.shader.setUniform(this.uCameraBlockYPos, (float)MC_RENDER.getCameraExactPosition().y);
+		this.shader.setUniform(this.uCameraBlockYPos, (float)renderParams.exactCameraPosition.y);
 		
 	}
 	

common/src/main/java/com/seibel/distanthorizons/common/wrappers/minecraft/MinecraftRenderWrapper.java

@@ -22,6 +22,7 @@ package com.seibel.distanthorizons.common.wrappers.minecraft;
 import java.awt.Color;
 import java.util.concurrent.ConcurrentHashMap;
 
+import com.seibel.distanthorizons.core.render.RenderThreadTaskHandler;
 import org.jetbrains.annotations.Nullable;
 
 #if MC_VER > MC_1_12_2
@@ -216,10 +217,21 @@ public class MinecraftRenderWrapper implements IMinecraftRenderWrapper
 	@Override
 	public DhVec3d getCameraExactPosition()
 	{
-		if (DelayedAccessors.IMMERSIVE_PORTALS != null)
+		// When immersive portals is enabled getting the camera position
+		// outside the render thread means you may get the camera for any one of the dimensions
+		// immersive portals is currently rendering, which isn't what DH wants.
+		// We want the camera that the player is currently looking through.
+		if (DelayedAccessors.IMMERSIVE_PORTALS != null
+			&& !RenderThreadTaskHandler.INSTANCE.isCurrentThread())
 		{
+			// this camera position will likely be delayed by 1 frame, so it shouldn't
+			// be used for rendering,
+			// but anything else that doesn't require that level of percision is fine.
 			DhVec3d cameraPos = DelayedAccessors.IMMERSIVE_PORTALS.getActualCameraPos();
-			if (cameraPos != null) return cameraPos;
+			if (cameraPos != null)
+			{
+				return cameraPos;
+			}
 		}
 		
 		#if MC_VER <= MC_1_12_2