playcanvas/build/playcanvas/src/scene/shader-lib/chunks/lit/frag/lighting/lightFunctionShadow.js

PlayCanvas WebGL game engine

var lightFunctionShadowPS = "\n#ifdef LIGHT{i}CASTSHADOW\n	vec3 getShadowSampleCoord{i}(mat4 shadowTransform, vec4 shadowParams, vec3 worldPosition, vec3 lightPos, inout vec3 lightDir, vec3 lightDirNorm, vec3 normal) {\n		vec3 surfacePosition = worldPosition;\n		#ifdef LIGHT{i}_SHADOW_SAMPLE_POINT\n			#ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET\n				float distScale = length(lightDir);\n				surfacePosition = surfacePosition + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale;\n				lightDir = surfacePosition - lightPos;\n				return lightDir;\n			#endif\n		#else\n			#ifdef LIGHT{i}_SHADOW_SAMPLE_SOURCE_ZBUFFER\n				#ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET\n					surfacePosition = surfacePosition + normal * shadowParams.y;\n				#endif\n			#else\n				#ifdef LIGHT{i}_SHADOW_SAMPLE_NORMAL_OFFSET\n					#ifdef LIGHT{i}_SHADOW_SAMPLE_ORTHO\n						float distScale = 1.0;\n					#else\n						float distScale = abs(dot(vPositionW - lightPos, lightDirNorm));\n					#endif\n					surfacePosition = surfacePosition + normal * shadowParams.y * clamp(1.0 - dot(normal, -lightDirNorm), 0.0, 1.0) * distScale;\n				#endif\n			#endif\n			vec4 positionInShadowSpace = shadowTransform * vec4(surfacePosition, 1.0);\n			#ifdef LIGHT{i}_SHADOW_SAMPLE_ORTHO\n				positionInShadowSpace.z = saturate(positionInShadowSpace.z) - 0.0001;\n			#else\n				#ifdef LIGHT{i}_SHADOW_SAMPLE_SOURCE_ZBUFFER\n					positionInShadowSpace.xyz /= positionInShadowSpace.w;\n				#else\n					positionInShadowSpace.xy /= positionInShadowSpace.w;\n					positionInShadowSpace.z = length(lightDir) * shadowParams.w;\n				#endif\n			#endif\n			surfacePosition = positionInShadowSpace.xyz;\n		#endif\n		return surfacePosition;\n	}\n	float getShadow{i}(vec3 lightDirW) {\n		#ifdef LIGHT{i}_SHADOW_CASCADES\n			int cascadeIndex = getShadowCascadeIndex(light{i}_shadowCascadeDistances, light{i}_shadowCascadeCount);\n			#ifdef LIGHT{i}_SHADOW_CASCADE_BLEND\n				cascadeIndex = ditherShadowCascadeIndex(cascadeIndex, light{i}_shadowCascadeDistances, light{i}_shadowCascadeCount, light{i}_shadowCascadeBlend);\n			#endif\n			mat4 shadowMatrix = light{i}_shadowMatrixPalette[cascadeIndex];\n		#else\n			mat4 shadowMatrix = light{i}_shadowMatrix;\n		#endif\n		#if LIGHT{i}TYPE == DIRECTIONAL\n			vec3 shadowCoord = getShadowSampleCoord{i}(shadowMatrix, light{i}_shadowParams, vPositionW, vec3(0.0), lightDirW, dLightDirNormW, dVertexNormalW);\n		#else\n			vec3 shadowCoord = getShadowSampleCoord{i}(shadowMatrix, light{i}_shadowParams, vPositionW, light{i}_position, lightDirW, dLightDirNormW, dVertexNormalW);\n		#endif\n		#if LIGHT{i}TYPE == DIRECTIONAL\n			shadowCoord = fadeShadow(shadowCoord, light{i}_shadowCascadeDistances);\n		#endif\n		#if LIGHT{i}TYPE == DIRECTIONAL\n			#if LIGHT{i}SHADOWTYPE == VSM_16F\n				return getShadowVSM16(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 5.54);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == VSM_32F\n				return getShadowVSM32(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 15.0);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCSS_32F\n				#if LIGHT{i}SHAPE != PUNCTUAL\n					vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea;\n					return getShadowPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW);\n				#else\n					return getShadowPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, light{i}_softShadowParams, lightDirW);\n				#endif\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F\n				return getShadowPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F\n				return getShadowPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F\n				return getShadowPCF5x5(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n		#endif\n		#if LIGHT{i}TYPE == SPOT\n			#if LIGHT{i}SHADOWTYPE == VSM_16F\n				return getShadowSpotVSM16(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 5.54, lightDirW);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == VSM_32F\n				return getShadowSpotVSM32(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, 15.0, lightDirW);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCSS_32F\n				#if LIGHT{i}SHAPE != PUNCTUAL\n					vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea;\n				#else\n					vec2 shadowSearchArea = vec2(light{i}_shadowSearchArea);\n				#endif\n				return getShadowSpotPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F\n				return getShadowSpotPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F\n				return getShadowSpotPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF5_16F || LIGHT{i}SHADOWTYPE == PCF5_32F\n				return getShadowSpotPCF5x5(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams);\n			#endif\n		#endif\n		#if LIGHT{i}TYPE == OMNI\n			#if LIGHT{i}SHADOWTYPE == PCSS_32F\n				#if LIGHT{i}SHAPE != PUNCTUAL\n					vec2 shadowSearchArea = vec2(length(light{i}_halfWidth), length(light{i}_halfHeight)) * light{i}_shadowSearchArea;\n				#else\n					vec2 shadowSearchArea = vec2(light{i}_shadowSearchArea);\n				#endif\n				return getShadowOmniPCSS(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, light{i}_cameraParams, shadowSearchArea, lightDirW);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF1_16F || LIGHT{i}SHADOWTYPE == PCF1_32F\n				return getShadowOmniPCF1x1(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, lightDirW);\n			#endif\n			#if LIGHT{i}SHADOWTYPE == PCF3_16F || LIGHT{i}SHADOWTYPE == PCF3_32F\n				return getShadowOmniPCF3x3(SHADOWMAP_PASS(light{i}_shadowMap), shadowCoord, light{i}_shadowParams, lightDirW);\n			#endif\n		#endif\n	}\n#endif\n";

export { lightFunctionShadowPS as default };