LYGIA Shader Library

gaussian (lygia/lighting/specular/gaussian)

Check it on Github

#ifndef FNC_SPECULAR_GAUSSIAN
#define FNC_SPECULAR_GAUSSIAN

// https://github.com/glslify/glsl-specular-gaussian
float specularGaussian(const in float NoH, const in float roughness) {
    float theta = acos(NoH);
    float w = theta / roughness;
    return exp(-w*w);
}

float specularGaussian(ShadingData shadingData) {
    return specularGaussian(shadingData.NoH, shadingData.roughness);
}

#endif

Check it on Github

#ifndef FNC_SPECULAR_GAUSSIAN
#define FNC_SPECULAR_GAUSSIAN

// https://github.com/glslify/glsl-specular-gaussian
float specularGaussian(const in float NoH, const in float roughness) {
    float theta = acos(NoH);
    float w = theta / roughness;
    return exp(-w*w);
}

float specularGaussian(ShadingData shadingData) {
    return specularGaussian(shadingData.NoH, shadingData.roughness);
}

#endif

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