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vtkUnstructuredGridVolumeRayCastMapper.h
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vtkUnstructuredGridVolumeRayCastMapper.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkUnstructuredGridVolumeRayCastMapper.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.
=========================================================================*/
/**
* @class vtkUnstructuredGridVolumeRayCastMapper
* @brief A software mapper for unstructured volumes
*
* This is a software ray caster for rendering volumes in vtkUnstructuredGrid.
*
* @sa
* vtkVolumeMapper
*/
#ifndef vtkUnstructuredGridVolumeRayCastMapper_h
#define vtkUnstructuredGridVolumeRayCastMapper_h
#include "vtkRenderingVolumeModule.h" // For export macro
#include "vtkUnstructuredGridVolumeMapper.h"
class vtkDoubleArray;
class vtkIdList;
class vtkMultiThreader;
class vtkRayCastImageDisplayHelper;
class vtkRenderer;
class vtkTimerLog;
class vtkUnstructuredGridVolumeRayCastFunction;
class vtkUnstructuredGridVolumeRayCastIterator;
class vtkUnstructuredGridVolumeRayIntegrator;
class vtkVolume;
class VTKRENDERINGVOLUME_EXPORT vtkUnstructuredGridVolumeRayCastMapper : public vtkUnstructuredGridVolumeMapper
{
public:
static vtkUnstructuredGridVolumeRayCastMapper *New();
vtkTypeMacro(vtkUnstructuredGridVolumeRayCastMapper,vtkUnstructuredGridVolumeMapper);
void PrintSelf( ostream& os, vtkIndent indent ) override;
//@{
/**
* Sampling distance in the XY image dimensions. Default value of 1 meaning
* 1 ray cast per pixel. If set to 0.5, 4 rays will be cast per pixel. If
* set to 2.0, 1 ray will be cast for every 4 (2 by 2) pixels.
*/
vtkSetClampMacro( ImageSampleDistance, float, 0.1f, 100.0f );
vtkGetMacro( ImageSampleDistance, float );
//@}
//@{
/**
* This is the minimum image sample distance allow when the image
* sample distance is being automatically adjusted
*/
vtkSetClampMacro( MinimumImageSampleDistance, float, 0.1f, 100.0f );
vtkGetMacro( MinimumImageSampleDistance, float );
//@}
//@{
/**
* This is the maximum image sample distance allow when the image
* sample distance is being automatically adjusted
*/
vtkSetClampMacro( MaximumImageSampleDistance, float, 0.1f, 100.0f );
vtkGetMacro( MaximumImageSampleDistance, float );
//@}
//@{
/**
* If AutoAdjustSampleDistances is on, the the ImageSampleDistance
* will be varied to achieve the allocated render time of this
* prop (controlled by the desired update rate and any culling in
* use).
*/
vtkSetClampMacro( AutoAdjustSampleDistances, int, 0, 1 );
vtkGetMacro( AutoAdjustSampleDistances, int );
vtkBooleanMacro( AutoAdjustSampleDistances, int );
//@}
//@{
/**
* Set/Get the number of threads to use. This by default is equal to
* the number of available processors detected.
*/
vtkSetMacro( NumberOfThreads, int );
vtkGetMacro( NumberOfThreads, int );
//@}
//@{
/**
* If IntermixIntersectingGeometry is turned on, the zbuffer will be
* captured and used to limit the traversal of the rays.
*/
vtkSetClampMacro( IntermixIntersectingGeometry, int, 0, 1 );
vtkGetMacro( IntermixIntersectingGeometry, int );
vtkBooleanMacro( IntermixIntersectingGeometry, int );
//@}
//@{
/**
* Set/Get the helper class for casting rays.
*/
virtual void SetRayCastFunction(vtkUnstructuredGridVolumeRayCastFunction *f);
vtkGetObjectMacro(RayCastFunction, vtkUnstructuredGridVolumeRayCastFunction);
//@}
//@{
/**
* Set/Get the helper class for integrating rays. If set to NULL, a
* default integrator will be assigned.
*/
virtual void SetRayIntegrator(vtkUnstructuredGridVolumeRayIntegrator *ri);
vtkGetObjectMacro(RayIntegrator, vtkUnstructuredGridVolumeRayIntegrator);
//@}
/**
* WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
* Initialize rendering for this volume.
*/
void Render( vtkRenderer *, vtkVolume * ) override;
/**
* WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
* Release any graphics resources that are being consumed by this mapper.
* The parameter window could be used to determine which graphic
* resources to release.
*/
void ReleaseGraphicsResources(vtkWindow *) override;
vtkGetVectorMacro( ImageInUseSize, int, 2 );
vtkGetVectorMacro( ImageOrigin, int, 2 );
vtkGetVectorMacro( ImageViewportSize, int , 2 );
void CastRays( int threadID, int threadCount );
protected:
vtkUnstructuredGridVolumeRayCastMapper();
~vtkUnstructuredGridVolumeRayCastMapper() override;
float ImageSampleDistance;
float MinimumImageSampleDistance;
float MaximumImageSampleDistance;
int AutoAdjustSampleDistances;
vtkMultiThreader *Threader;
int NumberOfThreads;
vtkRayCastImageDisplayHelper *ImageDisplayHelper;
// This is how big the image would be if it covered the entire viewport
int ImageViewportSize[2];
// This is how big the allocated memory for image is. This may be bigger
// or smaller than ImageFullSize - it will be bigger if necessary to
// ensure a power of 2, it will be smaller if the volume only covers a
// small region of the viewport
int ImageMemorySize[2];
// This is the size of subregion in ImageSize image that we are using for
// the current image. Since ImageSize is a power of 2, there is likely
// wasted space in it. This number will be used for things such as clearing
// the image if necessary.
int ImageInUseSize[2];
// This is the location in ImageFullSize image where our ImageSize image
// is located.
int ImageOrigin[2];
// This is the allocated image
unsigned char *Image;
float *RenderTimeTable;
vtkVolume **RenderVolumeTable;
vtkRenderer **RenderRendererTable;
int RenderTableSize;
int RenderTableEntries;
void StoreRenderTime( vtkRenderer *ren, vtkVolume *vol, float t );
float RetrieveRenderTime( vtkRenderer *ren, vtkVolume *vol );
int IntermixIntersectingGeometry;
float *ZBuffer;
int ZBufferSize[2];
int ZBufferOrigin[2];
// Get the ZBuffer value corresponding to location (x,y) where (x,y)
// are indexing into the ImageInUse image. This must be converted to
// the zbuffer image coordinates. Nearest neighbor value is returned.
double GetZBufferValue( int x, int y );
double GetMinimumBoundsDepth( vtkRenderer *ren,
vtkVolume *vol );
vtkUnstructuredGridVolumeRayCastFunction *RayCastFunction;
vtkUnstructuredGridVolumeRayCastIterator **RayCastIterators;
vtkUnstructuredGridVolumeRayIntegrator *RayIntegrator;
vtkUnstructuredGridVolumeRayIntegrator *RealRayIntegrator;
vtkIdList **IntersectedCellsBuffer;
vtkDoubleArray **IntersectionLengthsBuffer;
vtkDataArray **NearIntersectionsBuffer;
vtkDataArray **FarIntersectionsBuffer;
vtkVolume *CurrentVolume;
vtkRenderer *CurrentRenderer;
vtkDataArray *Scalars;
int CellScalars;
private:
vtkUnstructuredGridVolumeRayCastMapper(const vtkUnstructuredGridVolumeRayCastMapper&) = delete;
void operator=(const vtkUnstructuredGridVolumeRayCastMapper&) = delete;
};
#endif