pub fn estimate_direct(
    it: &dyn Interaction,
    u_scattering: Point2f,
    light: &Light,
    u_light: Point2f,
    scene: &Scene,
    sampler: &mut Sampler,
    handle_media: bool,
    specular: bool
) -> Spectrum
Expand description

Computes a direct lighting estimate for a single light source sample.