playcanvas
Version:
PlayCanvas WebGL game engine
14 lines (12 loc) • 484 B
JavaScript
var lightSpecularBlinnPS = `
float calcLightSpecular(float gloss, vec3 worldNormal, vec3 h) {
float nh = max( dot( h, worldNormal ), 0.0 );
float specPow = exp2(gloss * 11.0);
specPow = max(specPow, 0.0001);
return pow(nh, specPow) * (specPow + 2.0) / 8.0;
}
float getLightSpecular(vec3 h, vec3 reflDir, vec3 worldNormal, vec3 viewDir, vec3 lightDirNorm, float gloss, mat3 tbn) {
return calcLightSpecular(gloss, worldNormal, h);
}
`;
export { lightSpecularBlinnPS as default };