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Update leenkx/Shaders/std/shadows.glsl

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Onek8
2025-07-09 23:18:52 +00:00
parent 9e2b601445
commit 58140ad583
1 changed files with 59 additions and 18 deletions
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77
leenkx/Shaders/std/shadows.glsl
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@ -251,28 +251,69 @@ vec3 PCFFakeCube(sampler2DShadow shadowMap,
#endif
if (any(lessThan(uvtiled, vec2(0.0))) || any(greaterThan(uvtiled, vec2(1.0)))) {
return vec3(1.0); // Or handle edge cases differently
return vec3(1.0); // Handle edge cases by returning full light
}
vec3 result = vec3(0.0);
// In PCFFakeCube(), modify the sampling pattern to be more robust:
const vec2 offsets[9] = vec2[](
vec2(0, 0),
vec2(1, 0), vec2(-1, 0), vec2(0, 1), vec2(0, -1),
vec2(1, 1), vec2(-1, 1), vec2(1, -1), vec2(-1, -1)
);
result.x += texture(shadowMap, vec3(uvtiled, compare));
// soft shadowing
int newFaceIndex = 0;
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(-1.0, 0.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(0.0, -1.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(-1.0, -1.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(0.0, 1.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(1.0, -1.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(1.0, 0.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
uvtiled = transformOffsetedUV(faceIndex, newFaceIndex, vec2(uv + (vec2(1.0, 1.0) / smSize)));
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * uvtiled + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y; // invert Y coordinates for direct3d coordinate system
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
for (int i = 0; i < 9; i++) {
vec2 sampleUV = uv + offsets[i] / smSize;
int newFaceIndex;
vec2 transformedUV = transformOffsetedUV(faceIndex, newFaceIndex, sampleUV);
pointLightTile = pointLightDataArray[lightIndex + newFaceIndex];
uvtiled = pointLightTile.z * transformedUV + pointLightTile.xy;
#ifdef _FlipY
uvtiled.y = 1.0 - uvtiled.y;
#endif
result.x += texture(shadowMap, vec3(uvtiled, compare));
}
result = result.xxx / 9.0;
pointLightTile = pointLightDataArray[lightIndex + faceIndex]; // x: tile X offset, y: tile Y offset, z: tile size relative to atlas