vtkSphericalDirectionEncoder.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkSphericalDirectionEncoder_h
#define vtkSphericalDirectionEncoder_h
 
#include "vtkDirectionEncoder.h"
#include "vtkRenderingVolumeModule.h" // For export macro
 
VTK_ABI_NAMESPACE_BEGIN
class VTKRENDERINGVOLUME_EXPORT vtkSphericalDirectionEncoder : public vtkDirectionEncoder
{
public:
  vtkTypeMacro(vtkSphericalDirectionEncoder, vtkDirectionEncoder);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkSphericalDirectionEncoder* New();

  int GetEncodedDirection(float n[3]) override;

  float* GetDecodedGradient(int value) VTK_SIZEHINT(3) override;

  int GetNumberOfEncodedDirections() override { return 65536; }

  float* GetDecodedGradientTable() override
  {
    return &(vtkSphericalDirectionEncoder::DecodedGradientTable[0]);
  }
 
protected:
  vtkSphericalDirectionEncoder();
  ~vtkSphericalDirectionEncoder() override;
 
  static float DecodedGradientTable[65536 * 3];


  static void InitializeDecodedGradientTable();
  static int DecodedGradientTableInitialized;
 
private:
  vtkSphericalDirectionEncoder(const vtkSphericalDirectionEncoder&) = delete;
  void operator=(const vtkSphericalDirectionEncoder&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif