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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 vec3 getShadowSampleCoord{i}(mat4 shadowTransform, vec4 shadowParams, vec3 worldPosition, vec3 lightPos, inout vec3 lightDir, vec3 lightDirNorm, vec3 normal) { vec3 surfacePosition = worldPosition; #ifdef LIGHT{i}_SHADOW_SAMPLE_POINT #ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET float distScale = 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 float distScale = 1.0; #else float distScale = abs(dot(vPositionW - lightPos, lightDirNorm)); #endif surfacePosition = surfacePosition + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale; #endif #endif vec4 positionInShadowSpace = shadowTransform * vec4(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.w; #else positionInShadowSpace.xy /= positionInShadowSpace.w; positionInShadowSpace.z = length(lightDir) * shadowParams.w; #endif #endif #ifdef SHADOW_SAMPLE_Z_BIAS #endif surfacePosition = positionInShadowSpace.xyz; #endif return surfacePosition; } float getShadow{i}(vec3 lightDirW) { #ifdef LIGHT{i}_SHADOW_CASCADES int cascadeIndex = getShadowCascadeIndex(light{i}_shadowCascadeDistances, light{i}_shadowCascadeCount); #ifdef LIGHT{i}_SHADOW_CASCADE_BLEND cascadeIndex = ditherShadowCascadeIndex(cascadeIndex, light{i}_shadowCascadeDistances, light{i}_shadowCascadeCount, light{i}_shadowCascadeBlend); #endif mat4 shadowMatrix = light{i}_shadowMatrixPalette[cascadeIndex]; #else mat4 shadowMatrix = light{i}_shadowMatrix; #endif #if LIGHT{i}TYPE == DIRECTIONAL vec3 shadowCoord = getShadowSampleCoord{i}(shadowMatrix, light{i}_shadowParams, vPositionW, vec3(0.0), lightDirW, dLightDirNormW, dVertexNormalW); #else vec3 shadowCoord = getShadowSampleCoord{i}(shadowMatrix, light{i}_shadowParams, vPositionW, light{i}_position, lightDirW, dLightDirNormW, dVertexNormalW); #endif #if LIGHT{i}TYPE == DIRECTIONAL shadowCoord = fadeShadow(shadowCoord, light{i}_shadowCascadeDistances); #endif #if LIGHT{i}TYPE == DIRECTIONAL #if LIGHT{i}SHADOWTYPE == VSM_16F return getShadowVSM16(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 5.54); #endif #if LIGHT{i}SHADOWTYPE == VSM_32F return getShadowVSM32(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 15.0); #endif #if LIGHT{i}SHADOWTYPE == PCSS_32F #if LIGHT{i}SHAPE != PUNCTUAL vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea; return getShadowPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW); #else return getShadowPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, light{i}_softShadowParams, lightDirW); #endif #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F return getShadowPCF5x5(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #endif #if LIGHT{i}TYPE == SPOT #if LIGHT{i}SHADOWTYPE == VSM_16F return getShadowSpotVSM16(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 5.54, lightDirW); #endif #if LIGHT{i}SHADOWTYPE == VSM_32F return getShadowSpotVSM32(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 15.0, lightDirW); #endif #if LIGHT{i}SHADOWTYPE == PCSS_32F #if LIGHT{i}SHAPE != PUNCTUAL vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea; #else vec2 shadowSearchArea = vec2(light{i}_shadowSearchArea); #endif return getShadowSpotPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW); #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowSpotPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowSpotPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F return getShadowSpotPCF5x5(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams); #endif #endif #if LIGHT{i}TYPE == OMNI #if LIGHT{i}SHADOWTYPE == PCSS_32F #if LIGHT{i}SHAPE != PUNCTUAL vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea; #else vec2 shadowSearchArea = vec2(light{i}_shadowSearchArea); #endif return getShadowOmniPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW); #endif #if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F return getShadowOmniPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, lightDirW); #endif #if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F return getShadowOmniPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, lightDirW); #endif #endif } #endif `; export { lightFunctionShadowPS as default };