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playcanvas

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PlayCanvas WebGL game engine

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playcanvas/engine

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var lightFunctionShadowPS = ` #ifdef LIGHT{i}CASTSHADOW fn getShadowSampleCoord{i}(shadowTransform: mat4x4f, shadowParams: vec4f, worldPosition: vec3f, lightPos: vec3f, lightDir: ptr<function, vec3f>, lightDirNorm: vec3f, normal: vec3f) -> vec3f { var surfacePosition = worldPosition; #ifdef LIGHT{i}_SHADOW_SAMPLE_POINT #ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET let distScale: f32 = length(*lightDir); surfacePosition = surfacePosition + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale; *lightDir = surfacePosition - lightPos; return *lightDir; #endif #else #ifdef LIGHT{i}_SHADOW_SAMPLE_SOURCE_ZBUFFER #ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET surfacePosition = surfacePosition + normal * shadowParams.y; #endif #else #ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET #ifdef LIGHT{i}_SHADOW_SAMPLE_ORTHO var distScale: f32 = 1.0; #else var distScale: f32 = abs(dot(vPositionW - lightPos, lightDirNorm)); #endif surfacePosition = surfacePosition + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale; #endif #endif var positionInShadowSpace: vec4f = shadowTransform * vec4f(surfacePosition, 1.0); #ifdef LIGHT{i}_SHADOW_SAMPLE_ORTHO positionInShadowSpace.z = saturate(positionInShadowSpace.z) - 0.0001; #else #ifdef LIGHT{i}_SHADOW_SAMPLE_SOURCE_ZBUFFER positionInShadowSpace.xyz = positionInShadowSpace.xyz / positionInShadowSpace.w; #else positionInShadowSpace.xy = positionInShadowSpace.xy / positionInShadowSpace.w; positionInShadowSpace.z = length(*lightDir) * shadowParams.w; #endif #endif #ifdef SHADOW_SAMPLE_Z_BIAS #endif surfacePosition = positionInShadowSpace.xyz; #endif return surfacePosition; } fn getShadow{i}(lightDirW_in: vec3f) -> f32 { #ifdef LIGHT{i}_SHADOW_CASCADES var cascadeIndex: i32 = getShadowCascadeIndex(uniform.light{i}_shadowCascadeDistances, uniform.light{i}_shadowCascadeCount); #ifdef LIGHT{i}_SHADOW_CASCADE_BLEND cascadeIndex = ditherShadowCascadeIndex(cascadeIndex, uniform.light{i}_shadowCascadeDistances, uniform.light{i}_shadowCascadeCount, uniform.light{i}_shadowCascadeBlend); #endif var shadowMatrix: mat4x4f = uniform.light{i}_shadowMatrixPalette[cascadeIndex]; #else var shadowMatrix: mat4x4f = uniform.light{i}_shadowMatrix; #endif var lightDirArg = lightDirW_in; #if LIGHT{i}TYPE == DIRECTIONAL var shadowCoord: vec3f = getShadowSampleCoord{i}(shadowMatrix, uniform.light{i}_shadowParams, vPositionW, vec3f(0.0), &lightDirArg, dLightDirNormW, dVertexNormalW); #else var shadowCoord: vec3f = getShadowSampleCoord{i}(shadowMatrix, uniform.light{i}_shadowParams, vPositionW, uniform.light{i}_position, &lightDirArg, dLightDirNormW, dVertexNormalW); #endif #if LIGHT{i}TYPE == DIRECTIONAL shadowCoord = fadeShadow(shadowCoord, uniform.light{i}_shadowCascadeDistances); #endif #if LIGHT{i}TYPE == DIRECTIONAL #if LIGHT{i}SHADOWTYPE == VSM_16F return getShadowVSM16(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, 5.54); #endif #if LIGHT{i}SHADOWTYPE == VSM_32F return getShadowVSM32(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, 15.0); #endif #if LIGHT{i}SHADOWTYPE == PCSS_32F #if LIGHT{i}SHAPE != PUNCTUAL let shadowSearchArea = vec2f(length(uniform.light{i}_halfWidth), length(uniform.light{i}_halfHeight)) * uniform.light{i}_shadowSearchArea; return getShadowPCSS(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, uniform.light{i}_cameraParams, shadowSearchArea, lightDirW_in); #else return getShadowPCSS(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, uniform.light{i}_cameraParams, uniform.light{i}_softShadowParams, lightDirW_in); #endif #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowPCF1x1(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowPCF3x3(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F return getShadowPCF5x5(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #endif #if LIGHT{i}TYPE == SPOT #if LIGHT{i}SHADOWTYPE == VSM_16F return getShadowSpotVSM16(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, 5.54, lightDirW_in); #endif #if LIGHT{i}SHADOWTYPE == VSM_32F return getShadowSpotVSM32(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, 15.0, lightDirW_in); #endif #if LIGHT{i}SHADOWTYPE == PCSS_32F #if LIGHT{i}SHAPE != PUNCTUAL var shadowSearchArea: vec2f = vec2f(length(uniform.light{i}_halfWidth), length(uniform.light{i}_halfHeight)) * uniform.light{i}_shadowSearchArea; #else var shadowSearchArea: vec2f = vec2f(uniform.light{i}_shadowSearchArea); #endif return getShadowSpotPCSS(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, uniform.light{i}_cameraParams, shadowSearchArea, lightDirW_in); #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowSpotPCF1x1(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowSpotPCF3x3(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F return getShadowSpotPCF5x5(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams); #endif #endif #if LIGHT{i}TYPE == OMNI #if LIGHT{i}SHADOWTYPE == PCSS_32F var shadowSearchArea: vec2f; #if LIGHT{i}SHAPE != PUNCTUAL var shadowSearchArea: vec2f = vec2f(length(uniform.light{i}_halfWidth), length(uniform.light{i}_halfHeight)) * uniform.light{i}_shadowSearchArea; #else var shadowSearchArea: vec2f = vec2f(uniform.light{i}_shadowSearchArea); #endif return getShadowOmniPCSS(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, uniform.light{i}_cameraParams, shadowSearchArea, lightDirW_in); #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowOmniPCF1x1(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, lightDirW_in); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowOmniPCF3x3(light{i}_shadowMap, light{i}_shadowMapSampler, shadowCoord, uniform.light{i}_shadowParams, lightDirW_in); #endif #endif } #endif `; export { lightFunctionShadowPS as default };