Function rs_pbrt::core::interpolation::sample_fourier

pub fn sample_fourier(
    ak: &SmallVec<[Float; 128]>, 
    recip: &[Float], 
    m: i32, 
    u: Float, 
    pdf: &mut Float, 
    phi_ptr: &mut Float
) -> Float

Returns the value of the Fourier expansion at the sampled position.