Function render

examples/cuda/gpu/path_tracer_gpu/src/render_kernels.rs:6–21

(fb: *mut Vec3, view: Viewport, scene: &Scene, rand_states: *mut DefaultRand)

#[kernel]
pub unsafe fn render(fb: *mut Vec3, view: Viewport, scene: &Scene, rand_states: *mut DefaultRand) {
    let idx = thread::index_2d();
    if idx.x >= view.bounds.x as u32 || idx.y >= view.bounds.y as u32 {
        return;
    }
    let px_idx = idx.y as usize * view.bounds.x + idx.x as usize;

    // generate a tiny offset for the ray for antialiasing
    let rng = &mut *rand_states.add(px_idx);
    let offset = Vec2::from(rng.normal_f32_2());

    let ray = generate_ray(idx, &view, offset);

    let color = scene.ray_color(ray, rng);
    *fb.add(px_idx) += color;
}

/// Scales an accumulated buffer by the sample count, storing each pixel in the corresponding `out` pixel.
#[kernel]