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Shadow PCF

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Dynamitos
2025-05-10 22:58:20 +02:00
parent 08a4dbdfdf
commit 10f2a9235b
1 changed files with 25 additions and 7 deletions
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res/shaders/BasePass.slang
+25 -7
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@@ -32,20 +32,38 @@ float4 fragmentMain(in FragmentParameter params) : SV_Target
{
float4 lightSpacePos = mul(biasMat, mul(pLightEnv.directionalLights[i].lightSpaceMatrix, float4(params.position_WS, 1)));
float4 shadowCoord = lightSpacePos / lightSpacePos.w;
float shadow = 1.0f;
float dist = pLightEnv.shadowMap.Sample(pLightEnv.shadowSampler, shadowCoord.xy).r;
if (shadowCoord.w > 0 && dist > shadowCoord.z)
{
shadow = 0;
int2 texDim;
pLightEnv.shadowMap.GetDimensions(texDim.x, texDim.y);
float scale = 1.5f;
float dx = scale * 1.0 / float(texDim.x);
float dy = scale * 1.0 / float(texDim.y);
float shadowFactor = 0.0f;
int count = 0;
int range = 1;
for (int x = -range; x <= range; ++x) {
for (int y = -range; y <= range; ++y) {
float shadow = 1.0f;
if (shadowCoord.z > 0.0 && shadowCoord.z < 1.0)
{
float dist = pLightEnv.shadowMap.Sample(pLightEnv.shadowSampler, shadowCoord.xy + float2(dx * x, dy * y)).r;
if (shadowCoord.w > 0 && dist > shadowCoord.z)
{
shadow = 0;
}
}
shadowFactor += shadow;
count++;
}
}
result += shadow * pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
result += (shadowFactor / count) * pLightEnv.directionalLights[i].illuminate(lightingParams, brdf);
}
for (uint i = 0; i < pLightEnv.numPointLights; ++i)
{
//uint lightIndex = pLightCullingData.lightIndexList[startOffset + i];
result += pLightEnv.pointLights[i].illuminate(lightingParams, brdf);
}
//result += brdf.evaluateAmbient(lightingParams.viewDir_WS);
result += brdf.evaluateAmbient(lightingParams.viewDir_WS);
return float4(result, brdf.getAlpha());
}