playcanvas/build/playcanvas/src/scene/shader-lib/glsl/chunks/lit/frag/clusteredLightShadows.js

PlayCanvas WebGL game engine

var clusteredLightShadowsPS = `
vec3 _getShadowCoordPerspZbuffer(mat4 shadowMatrix, vec4 shadowParams, vec3 wPos) {
	vec4 projPos = shadowMatrix * vec4(wPos, 1.0);
	projPos.xyz /= projPos.w;
	return projPos.xyz;
}
vec3 getShadowCoordPerspZbufferNormalOffset(mat4 shadowMatrix, vec4 shadowParams, vec3 normal) {
	vec3 wPos = vPositionW + normal * shadowParams.y;
	return _getShadowCoordPerspZbuffer(shadowMatrix, shadowParams, wPos);
}
vec3 normalOffsetPointShadow(vec4 shadowParams, vec3 lightPos, vec3 lightDir, vec3 lightDirNorm, vec3 normal) {
	float distScale = length(lightDir);
	vec3 wPos = vPositionW + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale;
	vec3 dir = wPos - lightPos;
	return dir;
}
#if defined(CLUSTER_SHADOW_TYPE_PCF1)
float getShadowOmniClusteredPCF1(SHADOWMAP_ACCEPT(shadowMap), vec4 shadowParams, vec3 omniAtlasViewport, float shadowEdgePixels, vec3 lightDir) {
	float shadowTextureResolution = shadowParams.x;
	vec2 uv = getCubemapAtlasCoordinates(omniAtlasViewport, shadowEdgePixels, shadowTextureResolution, lightDir);
	float shadowZ = length(lightDir) * shadowParams.w + shadowParams.z;
	return textureShadow(shadowMap, vec3(uv, shadowZ));
}
#endif
#if defined(CLUSTER_SHADOW_TYPE_PCF3)
float getShadowOmniClusteredPCF3(SHADOWMAP_ACCEPT(shadowMap), vec4 shadowParams, vec3 omniAtlasViewport, float shadowEdgePixels, vec3 lightDir) {
	float shadowTextureResolution = shadowParams.x;
	vec2 uv = getCubemapAtlasCoordinates(omniAtlasViewport, shadowEdgePixels, shadowTextureResolution, lightDir);
	float shadowZ = length(lightDir) * shadowParams.w + shadowParams.z;
	vec3 shadowCoord = vec3(uv, shadowZ);
	return getShadowPCF3x3(SHADOWMAP_PASS(shadowMap), shadowCoord, shadowParams);
}
#endif
#if defined(CLUSTER_SHADOW_TYPE_PCF5)
float getShadowOmniClusteredPCF5(SHADOWMAP_ACCEPT(shadowMap), vec4 shadowParams, vec3 omniAtlasViewport, float shadowEdgePixels, vec3 lightDir) {
	float shadowTextureResolution = shadowParams.x;
	vec2 uv = getCubemapAtlasCoordinates(omniAtlasViewport, shadowEdgePixels, shadowTextureResolution, lightDir);
	float shadowZ = length(lightDir) * shadowParams.w + shadowParams.z;
	vec3 shadowCoord = vec3(uv, shadowZ);
	return getShadowPCF5x5(SHADOWMAP_PASS(shadowMap), shadowCoord, shadowParams);
}
#endif
#if defined(CLUSTER_SHADOW_TYPE_PCF1)
float getShadowSpotClusteredPCF1(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowCoord, vec4 shadowParams) {
	return textureShadow(shadowMap, shadowCoord);
}
#endif
#if defined(CLUSTER_SHADOW_TYPE_PCF3)
float getShadowSpotClusteredPCF3(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowCoord, vec4 shadowParams) {
	return getShadowSpotPCF3x3(SHADOWMAP_PASS(shadowMap), shadowCoord, shadowParams);
}
#endif
#if defined(CLUSTER_SHADOW_TYPE_PCF5)
float getShadowSpotClusteredPCF5(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowCoord, vec4 shadowParams) {
	return getShadowPCF5x5(SHADOWMAP_PASS(shadowMap), shadowCoord, shadowParams);
}
#endif
`;

export { clusteredLightShadowsPS as default };