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Patch_2

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Onek8
2026-02-24 11:44:01 -08:00
parent c9839c9be6
commit 1c3c30e6ce
34 changed files with 1629 additions and 1271 deletions
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163
leenkx/Shaders/std/shadows.glsl
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@ -23,6 +23,59 @@ uniform vec2 smSizeUniform;
#endif
#ifdef _ShadowMapAtlas
// PCF that clamps samples to tile boundaries to prevent bleeding
vec3 PCFTileAware(sampler2DShadow shadowMap,
#ifdef _ShadowMapTransparent
sampler2D shadowMapTransparent,
#endif
const vec2 uv, const float compare, const vec2 smSize,
const vec2 tileMin, const vec2 tileMax
#ifdef _ShadowMapTransparent
, const bool transparent
#endif
) {
vec3 result = vec3(0.0);
vec2 offset;
offset = vec2(-1.0, -1.0) / smSize;
result.x = texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(-1.0, 0.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(-1.0, 1.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(0.0, -1.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
result.x += texture(shadowMap, vec3(uv, compare));
offset = vec2(0.0, 1.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(1.0, -1.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(1.0, 0.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
offset = vec2(1.0, 1.0) / smSize;
result.x += texture(shadowMap, vec3(clamp(uv + offset, tileMin, tileMax), compare));
result = result.xxx / 9.0;
#ifdef _ShadowMapTransparent
if (transparent == false) {
vec4 shadowmap_transparent = texture(shadowMapTransparent, uv);
if (shadowmap_transparent.a < compare)
result *= shadowmap_transparent.rgb;
}
#endif
return result;
}
// https://www.khronos.org/registry/OpenGL/specs/gl/glspec20.pdf // p:168
// https://www.gamedev.net/forums/topic/687535-implementing-a-cube-map-lookup-function/5337472/
vec2 sampleCube(vec3 dir, out int faceIndex) {
@ -251,7 +304,7 @@ vec3 PCFFakeCube(sampler2DShadow shadowMap,
#endif
if (any(lessThan(uvtiled, vec2(0.0))) || any(greaterThan(uvtiled, vec2(1.0)))) {
return vec3(1.0); // Handle edge cases by returning full light
return vec3(1.0);
}
vec3 result = vec3(0.0);
@ -334,30 +387,55 @@ vec3 PCFFakeCube(sampler2DShadow shadowMap,
}
#endif
#ifdef _ShadowMapAtlas
uniform vec4 tileBounds;
#endif
vec3 shadowTest(sampler2DShadow shadowMap,
#ifdef _ShadowMapTransparent
sampler2D shadowMapTransparent,
#endif
const vec3 lPos, const float shadowsBias
#ifdef _ShadowMapTransparent
, const bool transparent
#endif
) {
#ifdef _ShadowMapTransparent
sampler2D shadowMapTransparent,
#endif
const vec3 lPos, const float shadowsBias
#ifdef _ShadowMapTransparent
, const bool transparent
#endif
) {
if (lPos.x < 0.0 || lPos.y < 0.0 || lPos.x > 1.0 || lPos.y > 1.0) return vec3(1.0);
#ifdef _ShadowMapAtlas
// use tile PCF
#ifdef _SMSizeUniform
vec2 smSizeAtlas = smSizeUniform;
#else
const vec2 smSizeAtlas = shadowmapSize;
#endif
return PCFTileAware(shadowMap,
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSizeAtlas,
tileBounds.xy, tileBounds.zw
#ifdef _ShadowMapTransparent
, transparent
#endif
);
#else
// use PCF for non-atlas shadows
#ifdef _SMSizeUniform
vec2 smSize = smSizeUniform;
#else
const vec2 smSize = shadowmapSize;
#endif
if (lPos.x < 0.0 || lPos.y < 0.0 || lPos.x > 1.0 || lPos.y > 1.0) return vec3(1.0);
return PCF(shadowMap,
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
#endif
}
#ifdef _CSM
@ -390,14 +468,14 @@ mat4 getCascadeMat(const float d, out int casi, out int casIndex) {
}
vec3 shadowTestCascade(sampler2DShadow shadowMap,
#ifdef _ShadowMapTransparent
sampler2D shadowMapTransparent,
#endif
const vec3 eye, const vec3 p, const float shadowsBias
#ifdef _ShadowMapTransparent
, const bool transparent
#endif
) {
#ifdef _ShadowMapTransparent
sampler2D shadowMapTransparent,
#endif
const vec3 eye, const vec3 p, const float shadowsBias
#ifdef _ShadowMapTransparent
, const bool transparent
#endif
) {
#ifdef _SMSizeUniform
vec2 smSize = smSizeUniform;
#else
@ -413,14 +491,14 @@ vec3 shadowTestCascade(sampler2DShadow shadowMap,
vec3 visibility = vec3(1.0);
if (lPos.w > 0.0) visibility = PCF(shadowMap,
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
// Blend cascade
// https://github.com/TheRealMJP/Shadows
@ -439,15 +517,16 @@ vec3 shadowTestCascade(sampler2DShadow shadowMap,
vec4 lPos2 = LWVP2 * vec4(p, 1.0);
lPos2.xyz /= lPos2.w;
vec3 visibility2 = vec3(1.0);
// use lPos2 coordinates for second cascade, not lPos
if (lPos2.w > 0.0) visibility2 = PCF(shadowMap,
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos.xy, lPos.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
#ifdef _ShadowMapTransparent
shadowMapTransparent,
#endif
lPos2.xy, lPos2.z - shadowsBias, smSize
#ifdef _ShadowMapTransparent
, transparent
#endif
);
float lerpAmt = smoothstep(0.0, blendThres, splitDist);
return mix(visibility2, visibility, lerpAmt);