support for refraction index

turanszkij · Jan 25, 2025 · eb6589c · eb6589c
1 parent 805015c
commit eb6589c
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Showing 3 changed files with 6 additions and 6 deletions.
diff --git a/WickedEngine/shaders/objectHF.hlsli b/WickedEngine/shaders/objectHF.hlsli
@@ -1068,7 +1068,7 @@ float4 main(PixelInput input, in bool is_frontface : SV_IsFrontFace) : SV_Target
 #endif // UNLIT
 
 #ifdef INTERIORMAPPING
-	color = surface.baseColor * InteriorMapping(surface.P, surface.V, material, meshinstance);
+	color = surface.baseColor * InteriorMapping(surface, material, meshinstance);
 #endif // INTERIORMAPPING
 
 

diff --git a/WickedEngine/shaders/shadingHF.hlsli b/WickedEngine/shaders/shadingHF.hlsli
@@ -668,7 +668,7 @@ inline uint AlphaToCoverage(half alpha, half alphaTest, float4 svposition)
 	return 0;
 }
 
-half4 InteriorMapping(in float3 P, in float3 V, in ShaderMaterial material, in ShaderMeshInstance meshinstance)
+half4 InteriorMapping(in Surface surface, in ShaderMaterial material, in ShaderMeshInstance meshinstance)
 {
 	[branch]
 	if (!material.textures[BASECOLORMAP].IsValid())
@@ -689,15 +689,15 @@ half4 InteriorMapping(in float3 P, in float3 V, in ShaderMaterial material, in S
 	float4x4 interiorTransform = mul(meshinstance.transformRaw.GetMatrix(), scaleMatrix);
 	float4x4 interiorProjection = inverse(interiorTransform);
 
-	const half3 clipSpacePos = mul(interiorProjection, float4(P, 1)).xyz;
+	const half3 clipSpacePos = mul(interiorProjection, float4(surface.P, 1)).xyz;
 
-	half3 R = -V;
+	half3 R = refract(-surface.V, surface.N, 1 - material.GetRefraction());
 	half3 RayLS = mul((half3x3)interiorProjection, R);
 	half3 FirstPlaneIntersect = (1 - clipSpacePos) / RayLS;
 	half3 SecondPlaneIntersect = (-1 - clipSpacePos) / RayLS;
 	half3 FurthestPlane = max(FirstPlaneIntersect, SecondPlaneIntersect);
 	half Distance = min(FurthestPlane.x, min(FurthestPlane.y, FurthestPlane.z));
-	half3 R_parallaxCorrected = P - meshinstance.center + R * Distance;
+	half3 R_parallaxCorrected = surface.P - meshinstance.center + R * Distance;
 
 	// By rotating the sampling vector I fix the cube projection to the object's rotation:
 	float3 t, s;

diff --git a/WickedEngine/shaders/visibility_surfaceCS.hlsl b/WickedEngine/shaders/visibility_surfaceCS.hlsl
@@ -56,7 +56,7 @@ void main(uint Gid : SV_GroupID, uint groupIndex : SV_GroupIndex)
 	}
 
 #ifdef INTERIORMAPPING
-	surface.baseColor *= InteriorMapping(surface.P, surface.V, surface.material, surface.inst);
+	surface.baseColor *= InteriorMapping(surface, surface.material, surface.inst);
 #endif // INTERIORMAPPING
 
 #if defined(UNLIT) || defined(INTERIORMAPPING)