Function pbrt::integrators::bdpt::generate_light_subpath

pub fn generate_light_subpath<'a>(
    scene: &'a Scene, 
    sampler: &mut dyn Sampler, 
    max_depth: u32, 
    time: Float, 
    light_distr: &Arc<Distribution1D>, 
    path: &mut Vec<Vertex<'a, 'a, 'a>>
) -> usize