matMask |= mapMask;
}
void ApplyBlendDiffuse(inout float4 dst, inout int matMask, float2 texCoords, int mapMask, inout float blend, float lod)
void ApplyBlendDiffuse(inout float4 dst, inout int matMask, float2 texCoords, float4 src, int mapMask, inout float blend, float lod, int diffuseTextureBound)
float4 src = SAMPLE_TEXTURE2D_LOD(_DecalAtlas2D, _trilinear_clamp_sampler_DecalAtlas2D, texCoords, lod);
if(diffuseTextureBound)
{
src *= SAMPLE_TEXTURE2D_LOD(_DecalAtlas2D, _trilinear_clamp_sampler_DecalAtlas2D, texCoords, lod);
}
src.w *= blend;
blend = src.w; // diffuse texture alpha affects all other channels
dst.xyz = src.xyz * src.w + dst.xyz * (1.0f - src.w);
float lodMask = ComputeTextureLOD(sampleMaskDdx, sampleMaskDdy, _DecalAtlasResolution);
float decalBlend = decalData.normalToWorld[0][3];
if((decalData.diffuseScaleBias.x > 0) && (decalData.diffuseScaleBias.y > 0))
{
ApplyBlendDiffuse(DBuffer0, mask, sampleDiffuse, DBUFFERHTILEBIT_DIFFUSE, decalBlend, lodDiffuse);
float albedoContribution = decalData.normalToWorld[1][3];
if (albedoContribution == 0.0f)
{
mask = 0; // diffuse will not get modified
}
alpha = alpha < decalBlend ? decalBlend : alpha; // use decal alpha if it is higher than transparent alpha
}
float4 src = decalData.baseColor;
int diffuseTextureBound = (decalData.diffuseScaleBias.x > 0) && (decalData.diffuseScaleBias.y > 0);
ApplyBlendDiffuse(DBuffer0, mask, sampleDiffuse, src, DBUFFERHTILEBIT_DIFFUSE, decalBlend, lodDiffuse, diffuseTextureBound );
alpha = alpha < decalBlend ? decalBlend : alpha; // use decal alpha if it is higher than transparent alpha
float albedoContribution = decalData.normalToWorld[1][3];
if (albedoContribution == 0.0f)
{
mask = 0; // diffuse will not get modified
}
if ((decalData.normalScaleBias.x > 0) && (decalData.normalScaleBias.y > 0))
{
ApplyBlendNormal(DBuffer1, mask, sampleNormal, DBUFFERHTILEBIT_NORMAL, (float3x3)decalData.normalToWorld, decalBlend, lodNormal);