vtkCesium3DTilesReader.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

#ifndef vtkCesium3DTilesReader_h
#define vtkCesium3DTilesReader_h

#include "vtkIOCesium3DTilesModule.h" // For export macro
#include "vtkPartitionedDataSetCollectionAlgorithm.h"
#include "vtkSmartPointer.h"  // For vtkSmartPointer
#include <vtk_nlohmannjson.h> // For nlohmann::json
#include VTK_NLOHMANN_JSON(json.hpp)

VTK_ABI_NAMESPACE_BEGIN
class vtkPartitionedDataSet;
class vtkTransform;
class vtkGLTFReader;

class VTKIOCESIUM3DTILES_EXPORT vtkCesium3DTilesReader
  : public vtkPartitionedDataSetCollectionAlgorithm
{
public:
  static vtkCesium3DTilesReader* New();
  vtkTypeMacro(vtkCesium3DTilesReader, vtkPartitionedDataSetCollectionAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetFilePathMacro(FileName);
  vtkGetFilePathMacro(FileName);


  vtkSetMacro(Level, int);
  vtkGetMacro(Level, int);

  virtual int CanReadFile(VTK_FILEPATH const char* name);

  vtkSmartPointer<vtkGLTFReader> GetTileReader(size_t index);

protected:
  vtkCesium3DTilesReader();
  ~vtkCesium3DTilesReader() override;

  void ReadTiles(vtkPartitionedDataSetCollection* pd, size_t numberOfRanks, size_t rank);
  std::pair<size_t, size_t> ToLocalIndex(size_t globalIndex);

  char* FileName = nullptr;

  int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

private:
  vtkCesium3DTilesReader(const vtkCesium3DTilesReader&) = delete;
  void operator=(const vtkCesium3DTilesReader&) = delete;

  int Level;
  class Tileset;
  friend class Tileset;
  std::vector<std::shared_ptr<Tileset>> Tilesets;
  std::map<std::string, size_t> FileNameToTilesetIndex;
  std::vector<vtkSmartPointer<vtkGLTFReader>> TileReaders;
};

VTK_ABI_NAMESPACE_END
#endif