vtkOSPRayVolumeMapperNode.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkOSPRayVolumeMapperNode.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkOSPRayVolumeMapperNode_h
#define vtkOSPRayVolumeMapperNode_h

#include "vtkRenderingOSPRayModule.h" // For export macro
#include "vtkVolumeMapperNode.h"

#include "ospray/ospray.h" // for ospray handle types

class vtkAbstractArray;
class vtkDataSet;
class vtkVolume;
class vtkOSPRayVolumeCache;

class VTKRENDERINGOSPRAY_EXPORT vtkOSPRayVolumeMapperNode :
  public vtkVolumeMapperNode
{
public:
  static vtkOSPRayVolumeMapperNode* New();
  vtkTypeMacro(vtkOSPRayVolumeMapperNode, vtkVolumeMapperNode);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual void Render(bool prepass) override;

  void SetSamplingRate(double rate) { this->SamplingRate = rate; }
  double GetSamplingRate() { return this->SamplingRate; }

protected:
  vtkOSPRayVolumeMapperNode();
  ~vtkOSPRayVolumeMapperNode();

  void UpdateTransferFunction(vtkVolume* vol, double *dataRange=nullptr);

  //TODO: SetAndGetters?
  int NumColors;
  double SamplingRate;
  double SamplingStep;  //base sampling step of each voxel
  bool UseSharedBuffers;
  OSPData SharedData;

  vtkTimeStamp BuildTime;
  vtkTimeStamp PropertyTime;

  OSPGeometry OSPRayIsosurface;
  OSPVolume OSPRayVolume;
  OSPTransferFunction TransferFunction;
  std::vector<float> TFVals;
  std::vector<float> TFOVals;

  vtkOSPRayVolumeCache *Cache;

private:
  vtkOSPRayVolumeMapperNode(const vtkOSPRayVolumeMapperNode&) = delete;
  void operator=(const vtkOSPRayVolumeMapperNode&) = delete;
};
#endif