LYGIA Shader Library

Dependencies:

• lygia/math/powFast.glsl
• lygia/lighting/toShininess.glsl

Check it on Github

#ifndef SPECULAR_POW
#if defined(TARGET_MOBILE) || defined(PLATFORM_RPI) || defined(PLATFORM_WEBGL)
#define SPECULAR_POW(A,B) powFast(A,B)
#else
#define SPECULAR_POW(A,B) pow(A,B)
#endif
#endif

#ifndef FNC_SPECULAR_PHONG
#define FNC_SPECULAR_PHONG 

// https://github.com/glslify/glsl-specular-phong
float specularPhong(const in vec3 L, const in vec3 N, const in vec3 V, const in float shininess) {
    vec3 R = reflect(L, N); // 2.0 * dot(N, L) * N - L;
    return SPECULAR_POW(max(0.0, dot(R, -V)), shininess);
}

float specularPhong(ShadingData shadingData) {
    return specularPhong(shadingData.L, shadingData.N, shadingData.V, shadingData.roughness);
}

float specularPhongRoughness(ShadingData shadingData) {
    return specularPhong(shadingData.L, shadingData.N, shadingData.V, toShininess(shadingData.roughness, 0.0));
}

#endif

Dependencies:

• lygia/math/powFast.glsl
• lygia/lighting/toShininess.glsl

Check it on Github

#ifndef SPECULAR_POW
#if defined(TARGET_MOBILE) || defined(PLATFORM_RPI) || defined(PLATFORM_WEBGL)
#define SPECULAR_POW(A,B) powFast(A,B)
#else
#define SPECULAR_POW(A,B) pow(A,B)
#endif
#endif

#ifndef FNC_SPECULAR_PHONG
#define FNC_SPECULAR_PHONG 

// https://github.com/glslify/glsl-specular-phong
float specularPhong(const in float3 L, const in float3 N, const in float3 V, const in float shininess) {
    float3 R = reflect(L, N); // 2.0 * dot(N, L) * N - L;
    return SPECULAR_POW(max(0.0, dot(R, -V)), shininess);
}

float specularPhong(ShadingData shadingData) {
    return specularPhong(shadingData.L, shadingData.N, shadingData.V, shadingData.roughness);
}

float specularPhongRoughness(ShadingData shadingData) {
    return specularPhong(shadingData.L, shadingData.N, shadingData.V, toShininess(shadingData.roughness, 0.0));
}

#endif