// Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
//     * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

#ifndef COLMAP_SRC_UTIL_PLY_H_
#define COLMAP_SRC_UTIL_PLY_H_

#include <string>
#include <vector>

#include "types.h"

namespace colmap {

struct PlyPoint {
  float x = 0.0f;
  float y = 0.0f;
  float z = 0.0f;
  float nx = 0.0f;
  float ny = 0.0f;
  float nz = 0.0f;
  uint8_t r = 0;
  uint8_t g = 0;
  uint8_t b = 0;
};

struct PlyMeshVertex {
  PlyMeshVertex() : x(0), y(0), z(0) {}
  PlyMeshVertex(const float x, const float y, const float z)
      : x(x), y(y), z(z) {}

  float x = 0.0f;
  float y = 0.0f;
  float z = 0.0f;
};

struct PlyMeshFace {
  PlyMeshFace() : vertex_idx1(0), vertex_idx2(0), vertex_idx3(0) {}
  PlyMeshFace(const size_t vertex_idx1, const size_t vertex_idx2,
              const size_t vertex_idx3)
      : vertex_idx1(vertex_idx1),
        vertex_idx2(vertex_idx2),
        vertex_idx3(vertex_idx3) {}

  size_t vertex_idx1 = 0;
  size_t vertex_idx2 = 0;
  size_t vertex_idx3 = 0;
};

struct PlyMesh {
  std::vector<PlyMeshVertex> vertices;
  std::vector<PlyMeshFace> faces;
};

// Read PLY point cloud from text or binary file.
std::vector<PlyPoint> ReadPly(const std::string& path);

// Write PLY point cloud to text or binary file.
void WriteTextPlyPoints(const std::string& path,
                        const std::vector<PlyPoint>& points,
                        const bool write_normal = true,
                        const bool write_rgb = true);
void WriteBinaryPlyPoints(const std::string& path,
                          const std::vector<PlyPoint>& points,
                          const bool write_normal = true,
                          const bool write_rgb = true);

// Write PLY mesh to text or binary file.
void WriteTextPlyMesh(const std::string& path, const PlyMesh& mesh);
void WriteBinaryPlyMesh(const std::string& path, const PlyMesh& mesh);

}  // namespace colmap

#endif  // COLMAP_SRC_UTIL_PLY_H_