Function rs_pbrt::core::interpolation::sample_catmull_rom_2d

pub fn sample_catmull_rom_2d(
    nodes1: &[Float],
    nodes2: &[Float],
    values: &[Float],
    cdf: &[Float],
    alpha: Float,
    u: Float,
    fval: Option<&mut Float>,
    pdf: Option<&mut Float>
) -> Float

Importance sampling of 2D functions via spline interpolants.