{"ast":null,"code":"// Do not edit.\nimport { ShaderStore } from \"../../Engines/shaderStore.js\";\nconst name = \"importanceSampling\";\nconst shader = `vec3 hemisphereCosSample(vec2 u) {float phi=2.*PI*u.x;float cosTheta2=1.-u.y;float cosTheta=sqrt(cosTheta2);float sinTheta=sqrt(1.-cosTheta2);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}\nvec3 hemisphereImportanceSampleDggx(vec2 u,float a) {float phi=2.*PI*u.x;float cosTheta2=(1.-u.y)/(1.+(a+1.)*((a-1.)*u.y));float cosTheta=sqrt(cosTheta2);float sinTheta=sqrt(1.-cosTheta2);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}\nvec3 hemisphereImportanceSampleDCharlie(vec2 u,float a) { \nfloat phi=2.*PI*u.x;float sinTheta=pow(u.y,a/(2.*a+1.));float cosTheta=sqrt(1.-sinTheta*sinTheta);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}`;\n// Sideeffect\nShaderStore.IncludesShadersStore[name] = shader;\n/** @internal */\nexport const importanceSampling = {\n  name,\n  shader\n};","map":{"version":3,"names":["ShaderStore","name","shader","IncludesShadersStore","importanceSampling"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/core/Shaders/ShadersInclude/importanceSampling.js"],"sourcesContent":["// Do not edit.\nimport { ShaderStore } from \"../../Engines/shaderStore.js\";\nconst name = \"importanceSampling\";\nconst shader = `vec3 hemisphereCosSample(vec2 u) {float phi=2.*PI*u.x;float cosTheta2=1.-u.y;float cosTheta=sqrt(cosTheta2);float sinTheta=sqrt(1.-cosTheta2);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}\nvec3 hemisphereImportanceSampleDggx(vec2 u,float a) {float phi=2.*PI*u.x;float cosTheta2=(1.-u.y)/(1.+(a+1.)*((a-1.)*u.y));float cosTheta=sqrt(cosTheta2);float sinTheta=sqrt(1.-cosTheta2);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}\nvec3 hemisphereImportanceSampleDCharlie(vec2 u,float a) { \nfloat phi=2.*PI*u.x;float sinTheta=pow(u.y,a/(2.*a+1.));float cosTheta=sqrt(1.-sinTheta*sinTheta);return vec3(sinTheta*cos(phi),sinTheta*sin(phi),cosTheta);}`;\n// Sideeffect\nShaderStore.IncludesShadersStore[name] = shader;\n/** @internal */\nexport const importanceSampling = { name, shader };\n"],"mappings":"AAAA;AACA,SAASA,WAAW,QAAQ,8BAA8B;AAC1D,MAAMC,IAAI,GAAG,oBAAoB;AACjC,MAAMC,MAAM,GAAG;AACf;AACA;AACA,8JAA8J;AAC9J;AACAF,WAAW,CAACG,oBAAoB,CAACF,IAAI,CAAC,GAAGC,MAAM;AAC/C;AACA,OAAO,MAAME,kBAAkB,GAAG;EAAEH,IAAI;EAAEC;AAAO,CAAC","ignoreList":[]},"metadata":{},"sourceType":"module","externalDependencies":[]}