vtkAMRVolumeMapper.h

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

  Program:   Visualization Toolkit
  Module:    vtkAMRVolumeMapper.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 vtkAMRVolumeMapper_h
#define vtkAMRVolumeMapper_h

#include "vtkImageReslice.h"             // for VTK_RESLICE_NEAREST, VTK_RESLICE_CUBIC
#include "vtkRenderingVolumeAMRModule.h" // For export macro
#include "vtkVolumeMapper.h"

class vtkAMRResampleFilter;
class vtkCamera;
class vtkImageData;
class vtkOverlappingAMR;
class vtkSmartVolumeMapper;
class vtkUniformGrid;

class VTKRENDERINGVOLUMEAMR_EXPORT vtkAMRVolumeMapper : public vtkVolumeMapper
{
public:
  static vtkAMRVolumeMapper* New();
  vtkTypeMacro(vtkAMRVolumeMapper, vtkVolumeMapper);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void SetInputData(vtkImageData*) override;
  void SetInputData(vtkDataSet*) override;
  virtual void SetInputData(vtkOverlappingAMR*);
  void SetInputConnection(int port, vtkAlgorithmOutput* input) override;
  void SetInputConnection(vtkAlgorithmOutput* input) override
  {
    this->SetInputConnection(0, input);
  }


  double* GetBounds() override;
  void GetBounds(double bounds[6]) override { this->vtkVolumeMapper::GetBounds(bounds); }

  void SetScalarMode(int mode) override;


  void SetBlendMode(int mode) override;
  int GetBlendMode() override;


  void SelectScalarArray(int arrayNum) override;
  void SelectScalarArray(const char* arrayName) override;


  char* GetArrayName() override;
  int GetArrayId() override;
  int GetArrayAccessMode() override;

  const char* GetScalarModeAsString();

  void SetCropping(vtkTypeBool) override;
  vtkTypeBool GetCropping() override;


  void SetCroppingRegionPlanes(
    double arg1, double arg2, double arg3, double arg4, double arg5, double arg6) override;
  void SetCroppingRegionPlanes(const double* planes) override
  {
    this->SetCroppingRegionPlanes(planes[0], planes[1], planes[2], planes[3], planes[4], planes[5]);
  }
  void GetCroppingRegionPlanes(double* planes) override;
  double* GetCroppingRegionPlanes() VTK_SIZEHINT(6) override;


  void SetCroppingRegionFlags(int mode) override;
  int GetCroppingRegionFlags() override;

  // The possible values for the default and current render mode ivars
  enum
  {
    DefaultRenderMode = 0,
    RayCastAndTextureRenderMode,
    RayCastRenderMode,
    TextureRenderMode,
    GPURenderMode,
    UndefinedRenderMode,
    InvalidRenderMode
  };


  void SetRequestedRenderMode(int mode);
  int GetRequestedRenderMode();

  void SetRequestedRenderModeToDefault()
  {
    this->SetRequestedRenderMode(vtkAMRVolumeMapper::DefaultRenderMode);
  }

  void SetRequestedRenderModeToRayCastAndTexture()
  {
    this->SetRequestedRenderMode(vtkAMRVolumeMapper::RayCastAndTextureRenderMode);
  }

  void SetRequestedRenderModeToRayCast()
  {
    this->SetRequestedRenderMode(vtkAMRVolumeMapper::RayCastRenderMode);
  }

  void SetRequestedRenderModeToTexture()
  {
    this->SetRequestedRenderMode(vtkAMRVolumeMapper::TextureRenderMode);
  }

  void SetRequestedRenderModeToGPU()
  {
    this->SetRequestedRenderMode(vtkAMRVolumeMapper::GPURenderMode);
  }


  void SetInterpolationMode(int mode);
  int GetInterpolationMode();

  void SetInterpolationModeToNearestNeighbor() { this->SetInterpolationMode(VTK_RESLICE_NEAREST); }

  void SetInterpolationModeToLinear() { this->SetInterpolationMode(VTK_RESLICE_LINEAR); }

  void SetInterpolationModeToCubic() { this->SetInterpolationMode(VTK_RESLICE_CUBIC); }


  vtkSetVector3Macro(NumberOfSamples, int);
  vtkGetVector3Macro(NumberOfSamples, int);

  void Render(vtkRenderer* ren, vtkVolume* vol) override;

  void ReleaseGraphicsResources(vtkWindow*) override;

  void ProcessUpdateExtentRequest(vtkRenderer* renderer, vtkInformation* info,
    vtkInformationVector** inputVector, vtkInformationVector* outputVector);
  void ProcessInformationRequest(vtkRenderer* renderer, vtkInformation* info,
    vtkInformationVector** inputVector, vtkInformationVector* outputVector);
  void UpdateResampler(vtkRenderer* ren, vtkOverlappingAMR* amr);
  void UpdateResamplerFrustrumMethod(vtkRenderer* ren, vtkOverlappingAMR* amr);


  vtkSetMacro(RequestedResamplingMode, int);
  vtkGetMacro(RequestedResamplingMode, int);
  vtkSetMacro(FreezeFocalPoint, bool);
  vtkGetMacro(FreezeFocalPoint, bool);


  vtkSetMacro(ResamplerUpdateTolerance, double);
  vtkGetMacro(ResamplerUpdateTolerance, double);


  vtkSetMacro(UseDefaultThreading, bool);
  vtkGetMacro(UseDefaultThreading, bool);

  static bool ComputeResamplerBoundsFrustumMethod(
    vtkCamera* camera, vtkRenderer* renderer, const double data_bounds[6], double out_bounds[6]);

protected:
  vtkAMRVolumeMapper();
  ~vtkAMRVolumeMapper() override;

  // see algorithm for more info
  int FillInputPortInformation(int port, vtkInformation* info) override;
  void UpdateGrid();

  vtkSmartVolumeMapper* InternalMapper;
  vtkAMRResampleFilter* Resampler;
  vtkUniformGrid* Grid;
  int NumberOfSamples[3];

  // This indicates that the input has meta data for
  // doing demand driven operations.
  bool HasMetaData;
  int RequestedResamplingMode;
  bool FreezeFocalPoint;
  // Cached values for camera focal point and
  // the distance between the camera position and
  // focal point
  double LastFocalPointPosition[3];
  double LastPostionFPDistance;
  // This is used when determining if
  // either the camera or focal point has
  // move enough to cause the resampler to update
  double ResamplerUpdateTolerance;
  bool GridNeedsToBeUpdated;
  bool UseDefaultThreading;

private:
  vtkAMRVolumeMapper(const vtkAMRVolumeMapper&) = delete;
  void operator=(const vtkAMRVolumeMapper&) = delete;
};

#endif