import { H as ShaderStore } from './index-BquY1VPT.esm.js';

// Do not edit.
const name = "helperFunctions";
const shader = `const PI: f32=3.1415926535897932384626433832795;const TWO_PI: f32=6.283185307179586;const HALF_PI: f32=1.5707963267948966;const RECIPROCAL_PI: f32=0.3183098861837907;const RECIPROCAL_PI2: f32=0.15915494309189535;const RECIPROCAL_PI4: f32=0.07957747154594767;const HALF_MIN: f32=5.96046448e-08; 
const LinearEncodePowerApprox: f32=2.2;const GammaEncodePowerApprox: f32=1.0/LinearEncodePowerApprox;const LuminanceEncodeApprox: vec3f=vec3f(0.2126,0.7152,0.0722);const Epsilon:f32=0.0000001;fn square(x: f32)->f32 {return x*x;}
fn saturate(x: f32)->f32 {return clamp(x,0.0,1.0);}
fn saturateVec3(x: vec3f)->vec3f {return clamp(x,vec3f(),vec3f(1.0));}
fn saturateEps(x: f32)->f32 {return clamp(x,Epsilon,1.0);}
fn maxEps(x: f32)->f32 {return max(x,Epsilon);}
fn maxEpsVec3(x: vec3f)->vec3f {return max(x,vec3f(Epsilon));}
fn absEps(x: f32)->f32 {return abs(x)+Epsilon;}
fn transposeMat3(inMatrix: mat3x3f)->mat3x3f {let i0: vec3f=inMatrix[0];let i1: vec3f=inMatrix[1];let i2: vec3f=inMatrix[2];let outMatrix:mat3x3f=mat3x3f(
vec3(i0.x,i1.x,i2.x),
vec3(i0.y,i1.y,i2.y),
vec3(i0.z,i1.z,i2.z)
);return outMatrix;}
fn inverseMat3(inMatrix: mat3x3f)->mat3x3f {let a00: f32=inMatrix[0][0];let a01: f32=inMatrix[0][1];let a02: f32=inMatrix[0][2];let a10: f32=inMatrix[1][0];let a11: f32=inMatrix[1][1];let a12: f32=inMatrix[1][2];let a20: f32=inMatrix[2][0];let a21: f32=inMatrix[2][1];let a22: f32=inMatrix[2][2];let b01: f32=a22*a11-a12*a21;let b11: f32=-a22*a10+a12*a20;let b21: f32=a21*a10-a11*a20;let det: f32=a00*b01+a01*b11+a02*b21;return mat3x3f(b01/det,(-a22*a01+a02*a21)/det,(a12*a01-a02*a11)/det,
b11/det,(a22*a00-a02*a20)/det,(-a12*a00+a02*a10)/det,
b21/det,(-a21*a00+a01*a20)/det,(a11*a00-a01*a10)/det);}
#if USE_EXACT_SRGB_CONVERSIONS
fn toLinearSpaceExact(color: vec3f)->vec3f
{let nearZeroSection: vec3f=0.0773993808*color;let remainingSection: vec3f=pow(0.947867299*(color+vec3f(0.055)),vec3f(2.4));return mix(remainingSection,nearZeroSection,lessThanEqual(color,vec3f(0.04045)));}
fn toGammaSpaceExact(color: vec3f)->vec3f
{let nearZeroSection: vec3f=12.92*color;let remainingSection: vec3f=1.055*pow(color,vec3f(0.41666))-vec3f(0.055);return mix(remainingSection,nearZeroSection,lessThanEqual(color,vec3f(0.0031308)));}
#endif
fn toLinearSpace(color: f32)->f32
{
#if USE_EXACT_SRGB_CONVERSIONS
var nearZeroSection=0.0773993808*color;var remainingSection=pow(0.947867299*(color+0.055),2.4);return select(remainingSection,nearZeroSection,color<=0.04045);
#else
return pow(color,LinearEncodePowerApprox);
#endif
}
fn toLinearSpaceVec3(color: vec3f)->vec3f
{
#if USE_EXACT_SRGB_CONVERSIONS
return toLinearSpaceExact(color);
#else
return pow(color,vec3f(LinearEncodePowerApprox));
#endif
}
fn toLinearSpaceVec4(color: vec4<f32>)->vec4<f32>
{
#if USE_EXACT_SRGB_CONVERSIONS
return vec4f(toLinearSpaceExact(color.rgb),color.a);
#else
return vec4f(pow(color.rgb,vec3f(LinearEncodePowerApprox)),color.a);
#endif
}
fn toGammaSpace(color: vec4<f32>)->vec4<f32>
{
#if USE_EXACT_SRGB_CONVERSIONS
return vec4<f32>(toGammaSpaceExact(color.rgb),color.a);
#else
return vec4<f32>(pow(color.rgb,vec3f(GammaEncodePowerApprox)),color.a);
#endif
}
fn toGammaSpaceVec3(color: vec3f)->vec3f
{
#if USE_EXACT_SRGB_CONVERSIONS
return toGammaSpaceExact(color);
#else
return pow(color,vec3f(GammaEncodePowerApprox));
#endif
}
fn squareVec3(value: vec3f)->vec3f
{return value*value;}
fn pow5(value: f32)->f32 {let sq: f32=value*value;return sq*sq*value;}
fn double_refract(I: vec3f,N: vec3f,eta: f32)->vec3f {let Tfront: vec3f=refract(I,N,1.0/eta);let Nback: vec3f=normalize(reflect(N,Tfront));return refract(Tfront,-Nback,eta);}
fn getLuminance(color: vec3f)->f32
{return saturate(dot(color,LuminanceEncodeApprox));}
fn getRand(seed: vec2<f32>)->f32 {return fract(sin(dot(seed.xy ,vec2<f32>(12.9898,78.233)))*43758.5453);}
fn dither(seed: vec2<f32>,varianceAmount: f32)->f32 {let rand: f32=getRand(seed);let normVariance: f32=varianceAmount/255.0;let dither: f32=mix(-normVariance,normVariance,rand);return dither;}
const rgbdMaxRange: f32=255.0;fn toRGBD(color: vec3f)->vec4<f32> {let maxRGB: f32=max(max(color.r,max(color.g,color.b)),Epsilon);var D: f32 =max(rgbdMaxRange/maxRGB,1.);D =clamp(floor(D)/255.0,0.,1.);var rgb: vec3f =color.rgb*D;rgb=toGammaSpaceVec3(rgb);return vec4<f32>(saturateVec3(rgb),D);}
fn fromRGBD(rgbd: vec4<f32>)->vec3f {let rgb=toLinearSpaceVec3(rgbd.rgb);return rgb/rgbd.a;}
fn parallaxCorrectNormal(vertexPos: vec3f,origVec: vec3f,cubeSize: vec3f,cubePos: vec3f)->vec3f {let invOrigVec: vec3f=vec3f(1.)/origVec;let halfSize: vec3f=cubeSize*0.5;let intersecAtMaxPlane: vec3f=(cubePos+halfSize-vertexPos)*invOrigVec;let intersecAtMinPlane: vec3f=(cubePos-halfSize-vertexPos)*invOrigVec;let largestIntersec: vec3f=max(intersecAtMaxPlane,intersecAtMinPlane);let distance: f32=min(min(largestIntersec.x,largestIntersec.y),largestIntersec.z);let intersectPositionWS: vec3f=vertexPos+origVec*distance;return intersectPositionWS-cubePos;}
fn equirectangularToCubemapDirection(uv : vec2f)->vec3f {var longitude : f32=uv.x*TWO_PI-PI;var latitude : f32=HALF_PI-uv.y*PI;var direction : vec3f;direction.x=cos(latitude)*sin(longitude);direction.y=sin(latitude);direction.z=cos(latitude)*cos(longitude);return direction;}
fn sqrtClamped(value: f32)->f32 {return sqrt(max(value,0.));}
fn avg(value: vec3f)->f32 {return dot(value,vec3f(0.333333333));}
fn singleScatterToMultiScatterAlbedo(rho_ss: vec3f)->vec3f {let s: vec3f=sqrt(max(vec3f(1.0)-rho_ss,vec3f(0.0)));return (vec3f(1.0)-s)*(vec3f(1.0)-vec3f(0.139)*s)/(vec3f(1.0)+vec3f(1.17)*s);}
fn min3(v: vec3f)->f32 {return min(v.x,min(v.y,v.z));}
fn max3(v: vec3f)->f32 {return max(v.x,max(v.y,v.z));}
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStoreWGSL[name]) {
    ShaderStore.IncludesShadersStoreWGSL[name] = shader;
}
//# sourceMappingURL=helperFunctions-bIGTgyKv.esm.js.map
