// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2023 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
//
//    Based on PVCNN Library (MIT License):
//    https://github.com/mit-han-lab/pvcnn
//
// Copyright (c) 2018 Zhijian Liu, Haotian Tang, Yujun Lin
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// ----------------------------------------------------------------------------

#pragma once

namespace open3d {
namespace ml {
namespace contrib {

__global__ void TrilinearDevoxelizeKernel(int b,
                                          int c,
                                          int n,
                                          int r,
                                          int r2,
                                          int r3,
                                          bool is_training,
                                          const float *__restrict__ coords,
                                          const float *__restrict__ feat,
                                          int *__restrict__ inds,
                                          float *__restrict__ wgts,
                                          float *__restrict__ outs);

__global__ void TrilinearDevoxelizeGradKernel(int b,
                                              int c,
                                              int n,
                                              int r3,
                                              const int *__restrict__ inds,
                                              const float *__restrict__ wgts,
                                              const float *__restrict__ grad_y,
                                              float *__restrict__ grad_x);

}  // namespace contrib
}  // namespace ml
}  // namespace open3d