Added ShaderUtilities.fxh with DepthToNormalizedDeviceZ() function

1 files changed, 3 insertions, 2 deletions

diff --git a/Shaders/PostProcess/EpipolarLightScattering/private/AtmosphereShadersCommon.fxh b/Shaders/PostProcess/EpipolarLightScattering/private/AtmosphereShadersCommon.fxh
index aed1253..a20f7de 100644
--- a/Shaders/PostProcess/EpipolarLightScattering/private/AtmosphereShadersCommon.fxh
+++ b/Shaders/PostProcess/EpipolarLightScattering/private/AtmosphereShadersCommon.fxh
@@ -4,6 +4,7 @@
 #include "FullScreenTriangleVSOutput.fxh"
 #include "ToneMappingStructures.fxh"
 #include "EpipolarLightScatteringStructures.fxh"
+#include "ShaderUtilities.fxh"
 
 #define PI      3.1415928f
 #define FLT_MAX 3.402823466e+38f
@@ -127,8 +128,8 @@ float3 ProjSpaceXYZToWorldSpace(in float3 f3PosPS, in float4x4 mProj, in float4x
     // matrix and then divide by w. Consequently, the inverse transform is also 
     // the same.
     // What differs is that in GL, NDC z is transformed from [-1,+1] to [0,1]
-    // before storing in the depth buffer
-    float fNDC_Z = MATRIX_ELEMENT(mProj,2,2) + MATRIX_ELEMENT(mProj,3,2) / f3PosPS.z;
+    // before storing in the depth buffer, which we will have to inverse.
+    float fNDC_Z = DepthToNormalizedDeviceZ(f3PosPS.z, mProj);
     float4 ReconstructedPosWS = mul( float4(f3PosPS.xy, fNDC_Z, 1.0), mViewProjInv );
     ReconstructedPosWS /= ReconstructedPosWS.w;
     return ReconstructedPosWS.xyz;