import { default } from "https://deno.land/x/threejs_4_deno@v121/src/renderers/shaders/ShaderChunk/envmap_physical_pars_fragment.glsl.js";
type
`
#if defined( USE_ENVMAP )
#ifdef ENVMAP_MODE_REFRACTION
uniform float refractionRatio;
#endif
vec3 getLightProbeIndirectIrradiance( /*const in SpecularLightProbe specularLightProbe,*/ const in GeometricContext geometry, const in int maxMIPLevel ) {
vec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );
#ifdef ENVMAP_TYPE_CUBE
vec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );
// TODO: replace with properly filtered cubemaps and access the irradiance LOD level, be it the last LOD level
// of a specular cubemap, or just the default level of a specially created irradiance cubemap.
#ifdef TEXTURE_LOD_EXT
vec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );
#else
// force the bias high to get the last LOD level as it is the most blurred.
vec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );
#endif
envMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;
#elif defined( ENVMAP_TYPE_CUBE_UV )
vec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );
#else
vec4 envMapColor = vec4( 0.0 );
#endif
return PI * envMapColor.rgb * envMapIntensity;
}
// Trowbridge-Reitz distribution to Mip level, following the logic of http://casual-effects.blogspot.ca/2011/08/plausible-environment-lighting-in-two.html
float getSpecularMIPLevel( const in float roughness, const in int maxMIPLevel ) {
float maxMIPLevelScalar = float( maxMIPLevel );
float sigma = PI * roughness * roughness / ( 1.0 + roughness );
float desiredMIPLevel = maxMIPLevelScalar + log2( sigma );
// clamp to allowable LOD ranges.
return clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );
}
vec3 getLightProbeIndirectRadiance( /*const in SpecularLightProbe specularLightProbe,*/ const in vec3 viewDir, const in vec3 normal, const in float roughness, const in int maxMIPLevel ) {
#ifdef ENVMAP_MODE_REFLECTION
vec3 reflectVec = reflect( -viewDir, normal );
// Mixing the reflection with the normal is more accurate and keeps rough objects from gathering light from behind their tangent plane.
reflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );
#else
vec3 reflectVec = refract( -viewDir, normal, refractionRatio );
#endif
reflectVec = inverseTransformDirection( reflectVec, viewMatrix );
float specularMIPLevel = getSpecularMIPLevel( roughness, maxMIPLevel );
#ifdef ENVMAP_TYPE_CUBE
vec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );
#ifdef TEXTURE_LOD_EXT
vec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );
#else
vec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );
#endif
envMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;
#elif defined( ENVMAP_TYPE_CUBE_UV )
vec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );
#endif
return envMapColor.rgb * envMapIntensity;
}
#endif
`