Remove normal shadowing feature

1 files changed, 0 insertions, 82 deletions

diff --git a/filamented.cginc b/filamented.cginc
index b2f2ddb..9edfca5 100644
--- a/filamented.cginc
+++ b/filamented.cginc
@@ -396,87 +396,5 @@ float noiseR2(float2 pixel) {
   return frac(a1 * float(pixel.x) + a2 * float(pixel.y));
 }
 
-#if defined(_BUMP_SHADOWS)
-struct NormalMapShadowsParam
-{
-  float4 uv;
-  float2 dX;
-  float2 dY;
-};
-
-NormalMapShadowsParam InitNormalMapShadowsParam(float4 uv)
-{
-  NormalMapShadowsParam nms;
-
-  nms.uv = uv;
-  nms.dX = ddx(uv.xy);
-  nms.dY = ddy(uv.xy);
-
-  return nms;
-}
-
-// Ref: Normal Mapping Shadows by Boris Vorontsov
-// Please define a NormalMapShadowsParam parameter
-// and SampleNormalMap function to sample the normal map.
-float NormalMapShadows (float3 lightDirTangent, NormalMapShadowsParam nmsParam, float noise,
-	float heightScale, float shadowHardness)
-{
-	const float screenShadowSamples = 20;
-	const float hardness = heightScale * shadowHardness;
-	const float sampleStep = 1.0 / screenShadowSamples;
-
-	float2 dir = lightDirTangent.xy * heightScale;
-
-	// Redundancy can't be helped
-  float3 normal = UnpackScaleNormal(tex2D(_BumpMap, nmsParam.uv), _BumpScale);
-
-	lightDirTangent = normalize(lightDirTangent);
-    float tangentNdotL = saturate(dot(lightDirTangent, normal));
-
-	float currentSample = sampleStep - sampleStep * noise;
-
-    // Skip on backfaces
-	currentSample += (tangentNdotL <= 0.0);
-
-	/*
-	From the PDF:
-	Trace from hit point to light direction and compute sum of dot products
-	between normal map and light direction.
-	If slope is bigger than 0, pixel is shadowed. If slope is also bigger
-	than previous maximal value, increase hardness of shadow.
-	*/
-
-	float result = 0;
-	float slope = -tangentNdotL;
-	float maxslope = 0.0;
-  for (uint i = 0; i < 1; i++)
-	{
-		normal = UnpackScaleNormal(tex2D(_BumpMap, nmsParam.uv + dir * currentSample), _BumpScale);
-		tangentNdotL = dot(lightDirTangent, normal);
-		slope = slope - tangentNdotL;
-		if (slope > maxslope)
-		{
-			result += hardness * (1.0-currentSample);
-		}
-		maxslope = max(maxslope, slope);
-		currentSample += sampleStep;
-    if (currentSample <= 1.0) {
-      break;
-    }
-	}
-
-	return result * sampleStep;
-}
-
-float NormalTangentShadow(float4 texcoords, half3 lightDirTS, float noise)
-{
-  float _HeightScale = _BumpShadowHeightScale;
-  float _ShadowHardness = _BumpShadowHardness;
-  NormalMapShadowsParam nms = InitNormalMapShadowsParam(texcoords);
-  nms.uv = texcoords;
-  return NormalMapShadows(lightDirTS, nms, noise, _HeightScale, _ShadowHardness);
-}
-#endif  // _BUMP_SHADOWS
-
 #endif