Reload cuscene error about yocto-gl

[TerminalTit]

I would be very grateful for any help in solving this problem

[TerminalTit]

I think we need to create new functions like update_cutrace_cameras. For example update_cutrace_shapes, update_cutrace_instances.

I can rotate mesh or camera on CPU, but I can rotate only camera while on GPU
Here some code of animation 360:

auto funcRotation = [](float angle, float o_x, float o_y, float radius_x, float radius_y)
  {
        float rad_angle = angle/rad;
        float point_x = o_x + radius_x * std::cos(rad_angle);
        float point_y = o_y + radius_y * std::sin(rad_angle);
        return vec2f{point_x,point_y};
    };

for (int i=0; i<steps; ++i)
 {
        vec2f coord_xz = funcRotation(angle,0,0,radius_x,radius_y);
        angle += angle_step;

        //*** CAMERA ROTATION***
        auto &cur_camera = _scene.cameras[0];
        cur_camera.frame = lookat_frame({coord_xz.x, 0, coord_xz.y},{0,0,0},{0,1,0});
        //*** MESH ROTATION work only with CPU***
        //auto &cur_instanse = _scene.instances[0];
        //cur_instanse.frame = lookat_frame({0, 0, 0},{coord_xz.x,0,coord_xz.y},{0,1,0});

#ifdef YOCTO_CUDA
        update_cutrace_cameras(_context,_cuscene,_scene,_params);
        reset_cutrace_state(_context,_state,_scene,_params);
        trace_start(_context, _state, _cuscene, _bvh, _lights, _scene, _params);
#else
        _state = make_trace_state(_scene, _params);
#endif

        for (auto sample : range(0, _params.samples, _params.batch))
        {
            auto sample_timer = simple_timer{};
#ifdef YOCTO_CUDA
            trace_samples(_context, _state, _cuscene, _bvh, _lights, _scene, _params);
#else
            trace_samples(_state, _scene, _bvh, _lights, _params);
#endif
            print_info("render sample {}/{}: {}", _state.samples, _params.samples, elapsed_formatted(sample_timer));
        }
        print_info("IMAGE render image: {}/{}", i+1, _rp.steps);
}

[TerminalTit]

So we can add or change shapes on CPU, but we can't add or change shapes on GPU. if i'm wrong, please guide me

[xelatihy]

Yes you are right. Shapes on GPU are fixed. On CPU you can only make small changes.

In general, the system is written under the assumption that the Bvh/Light gets fully rebuild on scene changes though. This is unlikely to change in the future since we optimize for large scene rendering and not interactive applications.