renderling::pbr::shader

Function sample_specular_reflection

Source 
pub fn sample_specular_reflection<T: SampleCube<Sampler = S>, S: IsSampler>(
    prefiltered: &T,
    prefiltered_sampler: &S,
    camera_pos: Vec3,
    in_pos: Vec3,
    n: Vec3,
    roughness: f32,
) -> Vec3