Fix shaders for reverse z

Source/Engine/Graphics/RenderView.cpp

@@ -64,7 +64,7 @@ void RenderView::Prepare(RenderContext& renderContext)
 void RenderView::PrepareCache(const RenderContext& renderContext, float width, float height, const Float2& temporalAAJitter, const RenderView* mainView)
 {
     // The same format used by the Flax common shaders and postFx materials
-    ViewInfo = Float4(1.0f / Projection.M11, 1.0f / Projection.M22, Far / (Far - Near), (-Far * Near) / (Far - Near) / Far);
+    ViewInfo = Float4(1.0f / Projection.M11, 1.0f / Projection.M22, Near / (Far - Near), (Far * Near) / (Far - Near) / Far);
     ScreenSize = Float4(width, height, 1.0f / width, 1.0f / height);
 
     TemporalAAJitter.Z = TemporalAAJitter.X;

Source/Engine/Renderer/DepthOfFieldPass.cpp

@@ -277,8 +277,8 @@ void DepthOfFieldPass::Render(RenderContext& renderContext, GPUTexture*& frame,
         cbData.BokehTargetSize.Y = static_cast<float>(bokehTargetHeight);
 
         // TODO: use projection matrix instead of this far and near stuff?
-        cbData.ProjectionAB.X = farPlane / (farPlane - nearPlane);
-        cbData.ProjectionAB.Y = (-farPlane * nearPlane) / (farPlane - nearPlane);
+        cbData.ProjectionAB.X = nearPlane / (farPlane - nearPlane);
+        cbData.ProjectionAB.Y = (farPlane * nearPlane) / (farPlane - nearPlane);
 
         auto cb = shader->GetCB(0);
         context->UpdateCB(cb, &cbData);

Source/Engine/Renderer/GBufferPass.cpp

@@ -396,7 +396,7 @@ bool GBufferPass::IsDebugView(ViewMode mode)
 void GBufferPass::SetInputs(const RenderView& view, GBufferData& gBuffer)
 {
     // GBuffer params:
-    // ViewInfo             :  x-1/Projection[0,0]   y-1/Projection[1,1]   z-(Far / (Far - Near)   w-(-Far * Near) / (Far - Near) / Far)
+    // ViewInfo             :  x-1/Projection[0,0]   y-1/Projection[1,1]   z-(Near / (Far - Near))   w-((Far * Near) / (Far - Near))
     // ScreenSize           :  x-Width               y-Height              z-1 / Width             w-1 / Height
     // ViewPos,ViewFar      :  x,y,z - world space view position                                   w-Far
     // InvViewMatrix        :  inverse view matrix (4 rows by 4 columns)

Source/Shaders/Common.hlsl

@@ -135,7 +135,7 @@ SamplerComparisonState ShadowSamplerPCF : register(s5);
 // Structure that contains information about GBuffer
 struct GBufferData
 {
-    float4 ViewInfo; // x-1/Projection[0,0], y-1/Projection[1,1], z-(Far / (Far - Near), w-(-Far * Near) / (Far - Near) / Far)
+    float4 ViewInfo; // x-1/Projection[0,0], y-1/Projection[1,1], z-(Near / (Far - Near)), w-((Far * Near) / (Far - Near) / Far)
     float4 ScreenSize; // x-Width, y-Height, z-1/Width, w-1/Height
     float3 ViewPos; // view position (in world space)
     float ViewFar; // view far plane distance (in world space)

Source/Shaders/DepthOfField.shader

@@ -96,7 +96,7 @@ Texture2D Input1 : register(t1);
 // Converts z-buffer depth to linear view-space depth
 float LinearDepth(in float zBufferDepth)
 {
-	return ProjectionAB.y / (zBufferDepth - ProjectionAB.x);
+	return ProjectionAB.y / (zBufferDepth + ProjectionAB.x);
 }
 
 // Depth of Field depth blur generation (outputs linear depth + blur factor to R16G16 target)

Source/Shaders/GBuffer.hlsl

@@ -27,13 +27,13 @@ Texture2D GBuffer3 : register(t4);
 // Linearize raw device depth
 float LinearizeZ(GBufferData gBuffer, float depth)
 {
-    return gBuffer.ViewInfo.w / ((1-depth) - gBuffer.ViewInfo.z);
+    return gBuffer.ViewInfo.w / (depth + gBuffer.ViewInfo.z);
 }
 
 // Convert linear depth to device depth
 float LinearZ2DeviceDepth(GBufferData gBuffer, float linearDepth)
 {
-    return 1 - ((gBuffer.ViewInfo.w / linearDepth) + gBuffer.ViewInfo.z);
+    return ((gBuffer.ViewInfo.w / linearDepth) - gBuffer.ViewInfo.z);
 }
 
 // Get view space position at given pixel coordinate with given device depth

Source/Shaders/SSAO.shader

@@ -275,7 +275,7 @@ void PrepareDepthMip(const float4 inPos, int mipLevel, out float outD0, out floa
 	{
 		float4 depths = depthsArr[i];
 		
-		float closest = min(min(depths.x, depths.y), min(depths.z, depths.w));
+		float closest = max(max(depths.x, depths.y), max(depths.z, depths.w));
 		
 		CalculateRadiusParameters(abs(closest), 1.0, dummyUnused1, dummyUnused2, falloffCalcMulSq);
 		

Source/Shaders/SSR.hlsl

@@ -98,7 +98,7 @@ float3 TraceScreenSpaceReflection(float2 uv, GBufferSample gBuffer, Texture2D de
     {
         // Sample depth buffer and calculate depth difference
         currSample = SAMPLE_RT(depthBuffer, currOffset.xy).r;
-        depthDiff = currOffset.z - currSample;
+        depthDiff = currSample - currOffset.z;
 
         // Check intersection
         if (depthDiff >= 0)