add EDhRenderDepth

core/src/main/java/com/seibel/distanthorizons/core/render/EDhRenderDepth.java

@@ -0,0 +1,32 @@
+package com.seibel.distanthorizons.core.render;
+
+/**
+ * FORWARD_Z, <br>
+ * REVERSE_Z, <br>
+ */
+public enum EDhRenderDepth
+{
+	/**
+	 * AKA Zero to One <br>
+	 * MC 26.1.2 and older (OpenGL) = false (near = 0.0f, far = 1.0f) 
+	 */
+	FORWARD_Z(0.0f, 1.0f),
+	/** 
+	 * AKA One to Zero <br>
+	 * MC 26.2.0 and newer (Vulkan/GL) = true (near = 1.0f, far = 0.0f) 
+	 */
+	REVERSE_Z(1.0f, 0.0f);
+	
+	
+	public final float nearDepth;
+	public final float farDepth;
+	
+	EDhRenderDepth(float nearDepth, float farDepth)
+	{
+		this.nearDepth = nearDepth;
+		this.farDepth = farDepth;
+	}
+	
+	
+	
+}

core/src/main/java/com/seibel/distanthorizons/core/util/RenderUtil.java

@@ -27,9 +27,11 @@ import com.seibel.distanthorizons.core.dependencyInjection.ModAccessorInjector;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.logging.DhLogger;
 import com.seibel.distanthorizons.core.logging.DhLoggerBuilder;
+import com.seibel.distanthorizons.core.render.EDhRenderDepth;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftRenderWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.modAccessor.IIrisAccessor;
+import com.seibel.distanthorizons.core.wrapperInterfaces.render.AbstractDhRenderApiDefinition;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.coreapi.util.MathUtil;
 import com.seibel.distanthorizons.core.util.math.Mat4f;
@@ -45,6 +47,7 @@ public class RenderUtil
 	private static final IMinecraftClientWrapper MC = SingletonInjector.INSTANCE.get(IMinecraftClientWrapper.class);
 	private static final IMinecraftRenderWrapper MC_RENDER = SingletonInjector.INSTANCE.get(IMinecraftRenderWrapper.class);
 	private static final IIrisAccessor IRIS_ACCESSOR = ModAccessorInjector.INSTANCE.get(IIrisAccessor.class);
+	private static final AbstractDhRenderApiDefinition RENDER_API_DEF = SingletonInjector.INSTANCE.get(AbstractDhRenderApiDefinition.class);
 	
 	/** 
 	 * all speeds are measured in blocks per second 
@@ -91,8 +94,18 @@ public class RenderUtil
 		
 		// Create a copy of the current matrix, so it won't be modified.
 		Mat4f lodProj = new Mat4f(mcProjMat);
+		
+		
 		// Set new far and near clip plane values.
-		lodProj.setClipPlanes(nearClipDist, farClipDist);
+		if (RENDER_API_DEF.getRenderDepth() == EDhRenderDepth.FORWARD_Z)
+		{
+			lodProj.setClipPlanes(nearClipDist, farClipDist, true);
+		}
+		else
+		{
+			lodProj.setClipPlanes(farClipDist, nearClipDist, false);
+		}
+		
 		return lodProj;
 	}
 	

core/src/main/java/com/seibel/distanthorizons/core/util/math/Mat4f.java

@@ -20,6 +20,8 @@
 package com.seibel.distanthorizons.core.util.math;
 
 import com.seibel.distanthorizons.api.objects.math.DhApiMat4f;
+import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.wrapperInterfaces.render.AbstractDhRenderApiDefinition;
 import org.joml.Matrix4f;
 import org.joml.Matrix4fc;
 
@@ -234,14 +236,11 @@ public class Mat4f extends DhApiMat4f
 	 * @param nearClip New near clipping plane value.
 	 * @param farClip New far clipping plane value.
 	 */
-	public void setClipPlanes(float nearClip, float farClip)
+	public void setClipPlanes(float nearClip, float farClip, boolean zZeroToOne)
 	{
-		//convert to matrix values, formula copied from a textbook / openGL specification.
-		float matNearClip = -((farClip + nearClip) / (farClip - nearClip));
-		float matFarClip = -((2 * farClip * nearClip) / (farClip - nearClip));
-		//set new values for the clip planes.
-		this.m22 = matNearClip;
-		this.m23 = matFarClip;
+		//convert to matrix values, formula copied JOML's implementation to match Minecraft
+		this.m22 = (zZeroToOne ? farClip : farClip + nearClip) / (nearClip - farClip);
+		this.m23 = (zZeroToOne ? farClip : farClip + farClip) * nearClip / (nearClip - farClip);
 	}
 	
 	public Mat4f copy() { return new Mat4f(this); }

core/src/main/java/com/seibel/distanthorizons/core/wrapperInterfaces/render/AbstractDhRenderApiDefinition.java

@@ -2,6 +2,7 @@ package com.seibel.distanthorizons.core.wrapperInterfaces.render;
 
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.jar.EPlatform;
+import com.seibel.distanthorizons.core.render.EDhRenderDepth;
 import com.seibel.distanthorizons.core.render.renderer.AbstractDebugWireframeRenderer;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.objects.IDhGenericObjectVertexBufferContainer;
 import com.seibel.distanthorizons.core.wrapperInterfaces.render.objects.ILodContainerUniformBufferWrapper;
@@ -29,6 +30,8 @@ public abstract class AbstractDhRenderApiDefinition implements IBindable
 	 */
 	public boolean useSingleIbo() { return this.useSingleIbo; }
 	
+	public abstract EDhRenderDepth getRenderDepth();
+	
 	//endregion