mirror of https://gitee.com/openkylin/vtk9.git
745 lines
26 KiB
C++
745 lines
26 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkFixedPointVolumeRayCastMapper.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkFixedPointVolumeRayCastMapper
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* @brief A fixed point mapper for volumes
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*
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* This is a software ray caster for rendering volumes in vtkImageData.
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* It works with all input data types and up to four components. It performs
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* composite or MIP rendering, and can be intermixed with geometric data.
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* Space leaping is used to speed up the rendering process. In addition,
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* calculation are performed in 15 bit fixed point precision. This mapper
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* is threaded, and will interleave scan lines across processors.
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*
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* WARNING: This ray caster may not produce consistent results when
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* the number of threads exceeds 1. The class warns if the number of
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* threads > 1. The differences may be subtle. Applications should decide
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* if the trade-off in performance is worth the lack of consistency.
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*
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* Other limitations of this ray caster include that:
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* - it does not do isosurface ray casting
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* - it does only interpolate before classify compositing
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* - it does only maximum scalar value MIP
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*
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* This mapper handles all data type from unsigned char through double.
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* However, some of the internal calcultions are performed in float and
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* therefore even the full float range may cause problems for this mapper
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* (both in scalar data values and in spacing between samples).
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*
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* Space leaping is performed by creating a sub-sampled volume. 4x4x4
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* cells in the original volume are represented by a min, max, and
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* combined gradient and flag value. The min max volume has three
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* unsigned shorts per 4x4x4 group of cells from the original volume -
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* one reprenting the minimum scalar index (the scalar value adjusted
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* to fit in the 15 bit range), the maximum scalar index, and a
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* third unsigned short which is both the maximum gradient opacity in
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* the neighborhood (an unsigned char) and the flag that is filled
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* in for the current lookup tables to indicate whether this region
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* can be skipped.
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*
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* @sa
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* vtkVolumeMapper
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*/
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#ifndef vtkFixedPointVolumeRayCastMapper_h
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#define vtkFixedPointVolumeRayCastMapper_h
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#include "vtkRenderingVolumeModule.h" // For export macro
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#include "vtkThreads.h" // for VTK_THREAD_RETURN_TYPE
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#include "vtkVolumeMapper.h"
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#define VTKKW_FP_SHIFT 15
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#define VTKKW_FPMM_SHIFT 17
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#define VTKKW_FP_MASK 0x7fff
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#define VTKKW_FP_SCALE 32767.0
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class vtkMatrix4x4;
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class vtkMultiThreader;
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class vtkPlaneCollection;
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class vtkRenderer;
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class vtkTimerLog;
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class vtkVolume;
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class vtkTransform;
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class vtkRenderWindow;
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class vtkColorTransferFunction;
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class vtkPiecewiseFunction;
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class vtkFixedPointVolumeRayCastMIPHelper;
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class vtkFixedPointVolumeRayCastCompositeHelper;
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class vtkFixedPointVolumeRayCastCompositeGOHelper;
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class vtkFixedPointVolumeRayCastCompositeGOShadeHelper;
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class vtkFixedPointVolumeRayCastCompositeShadeHelper;
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class vtkVolumeRayCastSpaceLeapingImageFilter;
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class vtkDirectionEncoder;
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class vtkEncodedGradientShader;
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class vtkFiniteDifferenceGradientEstimator;
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class vtkRayCastImageDisplayHelper;
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class vtkFixedPointRayCastImage;
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class vtkDataArray;
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// Forward declaration needed for use by friend declaration below.
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VTK_THREAD_RETURN_TYPE FixedPointVolumeRayCastMapper_CastRays(void* arg);
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VTK_THREAD_RETURN_TYPE vtkFPVRCMSwitchOnDataType(void* arg);
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class VTKRENDERINGVOLUME_EXPORT vtkFixedPointVolumeRayCastMapper : public vtkVolumeMapper
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{
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public:
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static vtkFixedPointVolumeRayCastMapper* New();
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vtkTypeMacro(vtkFixedPointVolumeRayCastMapper, vtkVolumeMapper);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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///@{
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/**
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* Set/Get the distance between samples used for rendering
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* when AutoAdjustSampleDistances is off, or when this mapper
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* has more than 1 second allocated to it for rendering.
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*/
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vtkSetMacro(SampleDistance, float);
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vtkGetMacro(SampleDistance, float);
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///@}
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///@{
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/**
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* Set/Get the distance between samples when interactive rendering is happening.
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* In this case, interactive is defined as this volume mapper having less than 1
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* second allocated for rendering. When AutoAdjustSampleDistance is On, and the
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* allocated render time is less than 1 second, then this InteractiveSampleDistance
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* will be used instead of the SampleDistance above.
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*/
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vtkSetMacro(InteractiveSampleDistance, float);
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vtkGetMacro(InteractiveSampleDistance, float);
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///@}
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///@{
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/**
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* Sampling distance in the XY image dimensions. Default value of 1 meaning
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* 1 ray cast per pixel. If set to 0.5, 4 rays will be cast per pixel. If
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* set to 2.0, 1 ray will be cast for every 4 (2 by 2) pixels. This value
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* will be adjusted to meet a desired frame rate when AutoAdjustSampleDistances
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* is on.
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*/
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vtkSetClampMacro(ImageSampleDistance, float, 0.1f, 100.0f);
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vtkGetMacro(ImageSampleDistance, float);
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///@}
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///@{
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/**
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* This is the minimum image sample distance allow when the image
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* sample distance is being automatically adjusted.
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*/
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vtkSetClampMacro(MinimumImageSampleDistance, float, 0.1f, 100.0f);
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vtkGetMacro(MinimumImageSampleDistance, float);
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///@}
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///@{
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/**
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* This is the maximum image sample distance allow when the image
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* sample distance is being automatically adjusted.
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*/
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vtkSetClampMacro(MaximumImageSampleDistance, float, 0.1f, 100.0f);
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vtkGetMacro(MaximumImageSampleDistance, float);
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///@}
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///@{
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/**
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* If AutoAdjustSampleDistances is on, the ImageSampleDistance
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* and the SampleDistance will be varied to achieve the allocated
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* render time of this prop (controlled by the desired update rate
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* and any culling in use). If this is an interactive render (more
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* than 1 frame per second) the SampleDistance will be increased,
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* otherwise it will not be altered (a binary decision, as opposed
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* to the ImageSampleDistance which will vary continuously).
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*/
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vtkSetClampMacro(AutoAdjustSampleDistances, vtkTypeBool, 0, 1);
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vtkGetMacro(AutoAdjustSampleDistances, vtkTypeBool);
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vtkBooleanMacro(AutoAdjustSampleDistances, vtkTypeBool);
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///@}
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///@{
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/**
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* Automatically compute the sample distance from the data spacing. When
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* the number of voxels is 8, the sample distance will be roughly 1/200
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* the average voxel size. The distance will grow proportionally to
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* numVoxels^(1/3) until it reaches 1/2 average voxel size when number of
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* voxels is 1E6. Note that ScalarOpacityUnitDistance is still taken into
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* account and if different than 1, will effect the sample distance.
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*/
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vtkSetClampMacro(LockSampleDistanceToInputSpacing, vtkTypeBool, 0, 1);
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vtkGetMacro(LockSampleDistanceToInputSpacing, vtkTypeBool);
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vtkBooleanMacro(LockSampleDistanceToInputSpacing, vtkTypeBool);
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///@}
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///@{
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/**
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* Set/Get the number of threads to use. This by default is equal to
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* the number of available processors detected.
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* WARNING: If number of threads > 1, results may not be consistent.
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*/
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void SetNumberOfThreads(int num);
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int GetNumberOfThreads();
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///@}
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///@{
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/**
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* If IntermixIntersectingGeometry is turned on, the zbuffer will be
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* captured and used to limit the traversal of the rays.
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*/
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vtkSetClampMacro(IntermixIntersectingGeometry, vtkTypeBool, 0, 1);
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vtkGetMacro(IntermixIntersectingGeometry, vtkTypeBool);
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vtkBooleanMacro(IntermixIntersectingGeometry, vtkTypeBool);
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///@}
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///@{
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/**
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* What is the image sample distance required to achieve the desired time?
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* A version of this method is provided that does not require the volume
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* argument since if you are using an LODProp3D you may not know this information.
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* If you use this version you must be certain that the ray cast mapper is
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* only used for one volume (and not shared among multiple volumes)
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*/
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float ComputeRequiredImageSampleDistance(float desiredTime, vtkRenderer* ren);
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float ComputeRequiredImageSampleDistance(float desiredTime, vtkRenderer* ren, vtkVolume* vol);
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///@}
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/**
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* WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
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* Initialize rendering for this volume.
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*/
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void Render(vtkRenderer*, vtkVolume*) override;
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unsigned int ToFixedPointPosition(float val);
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void ToFixedPointPosition(float in[3], unsigned int out[3]);
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unsigned int ToFixedPointDirection(float dir);
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void ToFixedPointDirection(float in[3], unsigned int out[3]);
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void FixedPointIncrement(unsigned int position[3], unsigned int increment[3]);
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void GetFloatTripleFromPointer(float v[3], float* ptr);
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void GetUIntTripleFromPointer(unsigned int v[3], unsigned int* ptr);
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void ShiftVectorDown(unsigned int in[3], unsigned int out[3]);
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int CheckMinMaxVolumeFlag(unsigned int pos[3], int c);
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int CheckMIPMinMaxVolumeFlag(unsigned int pos[3], int c, unsigned short maxIdx, int flip);
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void LookupColorUC(unsigned short* colorTable, unsigned short* scalarOpacityTable,
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unsigned short index, unsigned char color[4]);
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void LookupDependentColorUC(unsigned short* colorTable, unsigned short* scalarOpacityTable,
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unsigned short index[4], int components, unsigned char color[4]);
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void LookupAndCombineIndependentColorsUC(unsigned short* colorTable[4],
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unsigned short* scalarOpacityTable[4], unsigned short index[4], float weights[4],
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int components, unsigned char color[4]);
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int CheckIfCropped(unsigned int pos[3]);
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vtkGetObjectMacro(RenderWindow, vtkRenderWindow);
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vtkGetObjectMacro(MIPHelper, vtkFixedPointVolumeRayCastMIPHelper);
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vtkGetObjectMacro(CompositeHelper, vtkFixedPointVolumeRayCastCompositeHelper);
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vtkGetObjectMacro(CompositeGOHelper, vtkFixedPointVolumeRayCastCompositeGOHelper);
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vtkGetObjectMacro(CompositeGOShadeHelper, vtkFixedPointVolumeRayCastCompositeGOShadeHelper);
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vtkGetObjectMacro(CompositeShadeHelper, vtkFixedPointVolumeRayCastCompositeShadeHelper);
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vtkGetVectorMacro(TableShift, float, 4);
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vtkGetVectorMacro(TableScale, float, 4);
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vtkGetMacro(ShadingRequired, int);
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vtkGetMacro(GradientOpacityRequired, int);
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vtkGetObjectMacro(CurrentScalars, vtkDataArray);
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vtkGetObjectMacro(PreviousScalars, vtkDataArray);
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int* GetRowBounds() { return this->RowBounds; }
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unsigned short* GetColorTable(int c) { return this->ColorTable[c]; }
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unsigned short* GetScalarOpacityTable(int c) { return this->ScalarOpacityTable[c]; }
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unsigned short* GetGradientOpacityTable(int c) { return this->GradientOpacityTable[c]; }
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vtkVolume* GetVolume() { return this->Volume; }
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unsigned short** GetGradientNormal() { return this->GradientNormal; }
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unsigned char** GetGradientMagnitude() { return this->GradientMagnitude; }
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unsigned short* GetDiffuseShadingTable(int c) { return this->DiffuseShadingTable[c]; }
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unsigned short* GetSpecularShadingTable(int c) { return this->SpecularShadingTable[c]; }
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void ComputeRayInfo(
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int x, int y, unsigned int pos[3], unsigned int dir[3], unsigned int* numSteps);
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void InitializeRayInfo(vtkVolume* vol);
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int ShouldUseNearestNeighborInterpolation(vtkVolume* vol);
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///@{
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/**
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* Set / Get the underlying image object. One will be automatically
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* created - only need to set it when using from an AMR mapper which
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* renders multiple times into the same image.
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*/
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void SetRayCastImage(vtkFixedPointRayCastImage*);
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vtkGetObjectMacro(RayCastImage, vtkFixedPointRayCastImage);
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///@}
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int PerImageInitialization(vtkRenderer*, vtkVolume*, int, double*, double*, int*);
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void PerVolumeInitialization(vtkRenderer*, vtkVolume*);
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void PerSubVolumeInitialization(vtkRenderer*, vtkVolume*, int);
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void RenderSubVolume();
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void DisplayRenderedImage(vtkRenderer*, vtkVolume*);
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void AbortRender();
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void CreateCanonicalView(vtkVolume* volume, vtkImageData* image, int blend_mode,
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double viewDirection[3], double viewUp[3]);
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/**
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* Get an estimate of the rendering time for a given volume / renderer.
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* Only valid if this mapper has been used to render that volume for
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* that renderer previously. Estimate is good when the viewing parameters
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* have not changed much since that last render.
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*/
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float GetEstimatedRenderTime(vtkRenderer* ren, vtkVolume* vol)
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{
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return this->RetrieveRenderTime(ren, vol);
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}
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float GetEstimatedRenderTime(vtkRenderer* ren) { return this->RetrieveRenderTime(ren); }
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///@{
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/**
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* Set/Get the window / level applied to the final color.
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* This allows brightness / contrast adjustments on the
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* final image.
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* window is the width of the window.
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* level is the center of the window.
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* Initial window value is 1.0
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* Initial level value is 0.5
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* window cannot be null but can be negative, this way
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* values will be reversed.
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* |window| can be larger than 1.0
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* level can be any real value.
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*/
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vtkSetMacro(FinalColorWindow, float);
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vtkGetMacro(FinalColorWindow, float);
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vtkSetMacro(FinalColorLevel, float);
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vtkGetMacro(FinalColorLevel, float);
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///@}
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// Here to be used by the mapper to tell the helper
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// to flip the MIP comparison in order to support
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// minimum intensity blending
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vtkGetMacro(FlipMIPComparison, int);
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/**
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* WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
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* Release any graphics resources that are being consumed by this mapper.
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* The parameter window could be used to determine which graphic
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* resources to release.
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*/
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void ReleaseGraphicsResources(vtkWindow*) override;
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protected:
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vtkFixedPointVolumeRayCastMapper();
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~vtkFixedPointVolumeRayCastMapper() override;
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// The helper class that displays the image
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vtkRayCastImageDisplayHelper* ImageDisplayHelper;
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// The distance between sample points along the ray
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float SampleDistance;
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float InteractiveSampleDistance;
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// The distance between rays in the image
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float ImageSampleDistance;
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float MinimumImageSampleDistance;
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float MaximumImageSampleDistance;
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vtkTypeBool AutoAdjustSampleDistances;
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vtkTypeBool LockSampleDistanceToInputSpacing;
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// Saved values used to restore
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float OldSampleDistance;
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float OldImageSampleDistance;
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// Internal method for computing matrices needed during
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// ray casting
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void ComputeMatrices(double inputOrigin[3], double inputSpacing[3], int inputExtent[6],
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vtkRenderer* ren, vtkVolume* vol);
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int ComputeRowBounds(vtkRenderer* ren, int imageFlag, int rowBoundsFlag, int inputExtent[6]);
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void CaptureZBuffer(vtkRenderer* ren);
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friend VTK_THREAD_RETURN_TYPE FixedPointVolumeRayCastMapper_CastRays(void* arg);
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friend VTK_THREAD_RETURN_TYPE vtkFPVRCMSwitchOnDataType(void* arg);
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vtkMultiThreader* Threader;
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vtkMatrix4x4* PerspectiveMatrix;
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vtkMatrix4x4* ViewToWorldMatrix;
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vtkMatrix4x4* ViewToVoxelsMatrix;
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vtkMatrix4x4* VoxelsToViewMatrix;
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vtkMatrix4x4* WorldToVoxelsMatrix;
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vtkMatrix4x4* VoxelsToWorldMatrix;
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vtkMatrix4x4* VolumeMatrix;
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vtkTransform* PerspectiveTransform;
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vtkTransform* VoxelsTransform;
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vtkTransform* VoxelsToViewTransform;
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// This object encapsulated the image and all related information
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vtkFixedPointRayCastImage* RayCastImage;
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int* RowBounds;
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int* OldRowBounds;
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float* RenderTimeTable;
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vtkVolume** RenderVolumeTable;
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vtkRenderer** RenderRendererTable;
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int RenderTableSize;
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int RenderTableEntries;
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void StoreRenderTime(vtkRenderer* ren, vtkVolume* vol, float t);
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float RetrieveRenderTime(vtkRenderer* ren, vtkVolume* vol);
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float RetrieveRenderTime(vtkRenderer* ren);
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vtkTypeBool IntermixIntersectingGeometry;
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float MinimumViewDistance;
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vtkColorTransferFunction* SavedRGBFunction[4];
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vtkPiecewiseFunction* SavedGrayFunction[4];
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vtkPiecewiseFunction* SavedScalarOpacityFunction[4];
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vtkPiecewiseFunction* SavedGradientOpacityFunction[4];
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int SavedColorChannels[4];
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float SavedScalarOpacityDistance[4];
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int SavedBlendMode;
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vtkImageData* SavedParametersInput;
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vtkTimeStamp SavedParametersMTime;
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vtkImageData* SavedGradientsInput;
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vtkTimeStamp SavedGradientsMTime;
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float SavedSampleDistance;
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unsigned short ColorTable[4][32768 * 3];
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unsigned short ScalarOpacityTable[4][32768];
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unsigned short GradientOpacityTable[4][256];
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int TableSize[4];
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float TableScale[4];
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float TableShift[4];
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float GradientMagnitudeScale[4];
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float GradientMagnitudeShift[4];
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unsigned short** GradientNormal;
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unsigned char** GradientMagnitude;
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unsigned short* ContiguousGradientNormal;
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unsigned char* ContiguousGradientMagnitude;
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int NumberOfGradientSlices;
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vtkDirectionEncoder* DirectionEncoder;
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vtkEncodedGradientShader* GradientShader;
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vtkFiniteDifferenceGradientEstimator* GradientEstimator;
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unsigned short DiffuseShadingTable[4][65536 * 3];
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unsigned short SpecularShadingTable[4][65536 * 3];
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int ShadingRequired;
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int GradientOpacityRequired;
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vtkDataArray* CurrentScalars;
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vtkDataArray* PreviousScalars;
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vtkRenderWindow* RenderWindow;
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vtkVolume* Volume;
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int ClipRayAgainstVolume(
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double rayStart[3], double rayEnd[3], float rayDirection[3], double bounds[6]);
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int UpdateColorTable(vtkVolume* vol);
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int UpdateGradients(vtkVolume* vol);
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int UpdateShadingTable(vtkRenderer* ren, vtkVolume* vol);
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void UpdateCroppingRegions();
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void ComputeGradients(vtkVolume* vol);
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int ClipRayAgainstClippingPlanes(
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double rayStart[3], double rayEnd[3], int numClippingPlanes, float* clippingPlanes);
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unsigned int FixedPointCroppingRegionPlanes[6];
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unsigned int CroppingRegionMask[27];
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// Get the ZBuffer value corresponding to location (x,y) where (x,y)
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// are indexing into the ImageInUse image. This must be converted to
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// the zbuffer image coordinates. Nearest neighbor value is returned.
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float GetZBufferValue(int x, int y);
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vtkFixedPointVolumeRayCastMIPHelper* MIPHelper;
|
|
vtkFixedPointVolumeRayCastCompositeHelper* CompositeHelper;
|
|
vtkFixedPointVolumeRayCastCompositeGOHelper* CompositeGOHelper;
|
|
vtkFixedPointVolumeRayCastCompositeShadeHelper* CompositeShadeHelper;
|
|
vtkFixedPointVolumeRayCastCompositeGOShadeHelper* CompositeGOShadeHelper;
|
|
|
|
// Some variables used for ray computation
|
|
float ViewToVoxelsArray[16];
|
|
float WorldToVoxelsArray[16];
|
|
float VoxelsToWorldArray[16];
|
|
|
|
double CroppingBounds[6];
|
|
|
|
int NumTransformedClippingPlanes;
|
|
float* TransformedClippingPlanes;
|
|
|
|
double SavedSpacing[3];
|
|
|
|
// Min Max structure used to do space leaping
|
|
unsigned short* MinMaxVolume;
|
|
int MinMaxVolumeSize[4];
|
|
vtkImageData* SavedMinMaxInput;
|
|
vtkImageData* MinMaxVolumeCache;
|
|
vtkVolumeRayCastSpaceLeapingImageFilter* SpaceLeapFilter;
|
|
|
|
void UpdateMinMaxVolume(vtkVolume* vol);
|
|
void FillInMaxGradientMagnitudes(int fullDim[3], int smallDim[3]);
|
|
|
|
float FinalColorWindow;
|
|
float FinalColorLevel;
|
|
|
|
int FlipMIPComparison;
|
|
|
|
void ApplyFinalColorWindowLevel();
|
|
|
|
private:
|
|
vtkFixedPointVolumeRayCastMapper(const vtkFixedPointVolumeRayCastMapper&) = delete;
|
|
void operator=(const vtkFixedPointVolumeRayCastMapper&) = delete;
|
|
|
|
bool ThreadWarning;
|
|
};
|
|
|
|
inline unsigned int vtkFixedPointVolumeRayCastMapper::ToFixedPointPosition(float val)
|
|
{
|
|
return static_cast<unsigned int>(val * VTKKW_FP_SCALE + 0.5);
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::ToFixedPointPosition(float in[3], unsigned int out[3])
|
|
{
|
|
out[0] = static_cast<unsigned int>(in[0] * VTKKW_FP_SCALE + 0.5);
|
|
out[1] = static_cast<unsigned int>(in[1] * VTKKW_FP_SCALE + 0.5);
|
|
out[2] = static_cast<unsigned int>(in[2] * VTKKW_FP_SCALE + 0.5);
|
|
}
|
|
|
|
inline unsigned int vtkFixedPointVolumeRayCastMapper::ToFixedPointDirection(float dir)
|
|
{
|
|
return ((dir < 0.0) ? (static_cast<unsigned int>(-dir * VTKKW_FP_SCALE + 0.5))
|
|
: (0x80000000 + static_cast<unsigned int>(dir * VTKKW_FP_SCALE + 0.5)));
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::ToFixedPointDirection(
|
|
float in[3], unsigned int out[3])
|
|
{
|
|
out[0] = ((in[0] < 0.0) ? (static_cast<unsigned int>(-in[0] * VTKKW_FP_SCALE + 0.5))
|
|
: (0x80000000 + static_cast<unsigned int>(in[0] * VTKKW_FP_SCALE + 0.5)));
|
|
out[1] = ((in[1] < 0.0) ? (static_cast<unsigned int>(-in[1] * VTKKW_FP_SCALE + 0.5))
|
|
: (0x80000000 + static_cast<unsigned int>(in[1] * VTKKW_FP_SCALE + 0.5)));
|
|
out[2] = ((in[2] < 0.0) ? (static_cast<unsigned int>(-in[2] * VTKKW_FP_SCALE + 0.5))
|
|
: (0x80000000 + static_cast<unsigned int>(in[2] * VTKKW_FP_SCALE + 0.5)));
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::FixedPointIncrement(
|
|
unsigned int position[3], unsigned int increment[3])
|
|
{
|
|
if (increment[0] & 0x80000000)
|
|
{
|
|
position[0] += (increment[0] & 0x7fffffff);
|
|
}
|
|
else
|
|
{
|
|
position[0] -= increment[0];
|
|
}
|
|
if (increment[1] & 0x80000000)
|
|
{
|
|
position[1] += (increment[1] & 0x7fffffff);
|
|
}
|
|
else
|
|
{
|
|
position[1] -= increment[1];
|
|
}
|
|
if (increment[2] & 0x80000000)
|
|
{
|
|
position[2] += (increment[2] & 0x7fffffff);
|
|
}
|
|
else
|
|
{
|
|
position[2] -= increment[2];
|
|
}
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::GetFloatTripleFromPointer(float v[3], float* ptr)
|
|
{
|
|
v[0] = *(ptr);
|
|
v[1] = *(ptr + 1);
|
|
v[2] = *(ptr + 2);
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::GetUIntTripleFromPointer(
|
|
unsigned int v[3], unsigned int* ptr)
|
|
{
|
|
v[0] = *(ptr);
|
|
v[1] = *(ptr + 1);
|
|
v[2] = *(ptr + 2);
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::ShiftVectorDown(
|
|
unsigned int in[3], unsigned int out[3])
|
|
{
|
|
out[0] = in[0] >> VTKKW_FP_SHIFT;
|
|
out[1] = in[1] >> VTKKW_FP_SHIFT;
|
|
out[2] = in[2] >> VTKKW_FP_SHIFT;
|
|
}
|
|
|
|
inline int vtkFixedPointVolumeRayCastMapper::CheckMinMaxVolumeFlag(unsigned int mmpos[3], int c)
|
|
{
|
|
vtkIdType offset = static_cast<vtkIdType>(this->MinMaxVolumeSize[3]) *
|
|
(mmpos[2] * static_cast<vtkIdType>(this->MinMaxVolumeSize[0] * this->MinMaxVolumeSize[1]) +
|
|
mmpos[1] * static_cast<vtkIdType>(this->MinMaxVolumeSize[0]) + mmpos[0]) +
|
|
static_cast<vtkIdType>(c);
|
|
|
|
return ((*(this->MinMaxVolume + 3 * offset + 2)) & 0x00ff);
|
|
}
|
|
|
|
inline int vtkFixedPointVolumeRayCastMapper::CheckMIPMinMaxVolumeFlag(
|
|
unsigned int mmpos[3], int c, unsigned short maxIdx, int flip)
|
|
{
|
|
vtkIdType offset = static_cast<vtkIdType>(this->MinMaxVolumeSize[3]) *
|
|
(mmpos[2] * static_cast<vtkIdType>(this->MinMaxVolumeSize[0] * this->MinMaxVolumeSize[1]) +
|
|
mmpos[1] * static_cast<vtkIdType>(this->MinMaxVolumeSize[0]) + mmpos[0]) +
|
|
static_cast<vtkIdType>(c);
|
|
|
|
if ((*(this->MinMaxVolume + 3 * offset + 2) & 0x00ff))
|
|
{
|
|
if (flip)
|
|
{
|
|
return (*(this->MinMaxVolume + 3 * offset) < maxIdx);
|
|
}
|
|
else
|
|
{
|
|
return (*(this->MinMaxVolume + 3 * offset + 1) > maxIdx);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::LookupColorUC(unsigned short* colorTable,
|
|
unsigned short* scalarOpacityTable, unsigned short index, unsigned char color[4])
|
|
{
|
|
unsigned short alpha = scalarOpacityTable[index];
|
|
color[0] = static_cast<unsigned char>(
|
|
(colorTable[3 * index] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[1] = static_cast<unsigned char>(
|
|
(colorTable[3 * index + 1] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[2] = static_cast<unsigned char>(
|
|
(colorTable[3 * index + 2] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[3] = static_cast<unsigned char>(alpha >> (VTKKW_FP_SHIFT - 8));
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::LookupDependentColorUC(unsigned short* colorTable,
|
|
unsigned short* scalarOpacityTable, unsigned short index[4], int components,
|
|
unsigned char color[4])
|
|
{
|
|
unsigned short alpha;
|
|
switch (components)
|
|
{
|
|
case 2:
|
|
alpha = scalarOpacityTable[index[1]];
|
|
color[0] = static_cast<unsigned char>(
|
|
(colorTable[3 * index[0]] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[1] = static_cast<unsigned char>(
|
|
(colorTable[3 * index[0] + 1] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[2] = static_cast<unsigned char>(
|
|
(colorTable[3 * index[0] + 2] * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
color[3] = static_cast<unsigned char>(alpha >> (VTKKW_FP_SHIFT - 8));
|
|
break;
|
|
case 4:
|
|
alpha = scalarOpacityTable[index[3]];
|
|
color[0] = static_cast<unsigned char>((index[0] * alpha + 0x7fff) >> VTKKW_FP_SHIFT);
|
|
color[1] = static_cast<unsigned char>((index[1] * alpha + 0x7fff) >> VTKKW_FP_SHIFT);
|
|
color[2] = static_cast<unsigned char>((index[2] * alpha + 0x7fff) >> VTKKW_FP_SHIFT);
|
|
color[3] = static_cast<unsigned char>(alpha >> (VTKKW_FP_SHIFT - 8));
|
|
break;
|
|
}
|
|
}
|
|
|
|
inline void vtkFixedPointVolumeRayCastMapper::LookupAndCombineIndependentColorsUC(
|
|
unsigned short* colorTable[4], unsigned short* scalarOpacityTable[4], unsigned short index[4],
|
|
float weights[4], int components, unsigned char color[4])
|
|
{
|
|
unsigned int tmp[4] = { 0, 0, 0, 0 };
|
|
|
|
for (int i = 0; i < components; i++)
|
|
{
|
|
unsigned short alpha =
|
|
static_cast<unsigned short>(static_cast<float>(scalarOpacityTable[i][index[i]]) * weights[i]);
|
|
tmp[0] += static_cast<unsigned char>(
|
|
((colorTable[i][3 * index[i]]) * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
tmp[1] += static_cast<unsigned char>(
|
|
((colorTable[i][3 * index[i] + 1]) * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
tmp[2] += static_cast<unsigned char>(
|
|
((colorTable[i][3 * index[i] + 2]) * alpha + 0x7fff) >> (2 * VTKKW_FP_SHIFT - 8));
|
|
tmp[3] += static_cast<unsigned char>(alpha >> (VTKKW_FP_SHIFT - 8));
|
|
}
|
|
|
|
color[0] = static_cast<unsigned char>((tmp[0] > 255) ? (255) : (tmp[0]));
|
|
color[1] = static_cast<unsigned char>((tmp[1] > 255) ? (255) : (tmp[1]));
|
|
color[2] = static_cast<unsigned char>((tmp[2] > 255) ? (255) : (tmp[2]));
|
|
color[3] = static_cast<unsigned char>((tmp[3] > 255) ? (255) : (tmp[3]));
|
|
}
|
|
|
|
inline int vtkFixedPointVolumeRayCastMapper::CheckIfCropped(unsigned int pos[3])
|
|
{
|
|
int idx;
|
|
|
|
if (pos[2] < this->FixedPointCroppingRegionPlanes[4])
|
|
{
|
|
idx = 0;
|
|
}
|
|
else if (pos[2] > this->FixedPointCroppingRegionPlanes[5])
|
|
{
|
|
idx = 18;
|
|
}
|
|
else
|
|
{
|
|
idx = 9;
|
|
}
|
|
|
|
if (pos[1] >= this->FixedPointCroppingRegionPlanes[2])
|
|
{
|
|
if (pos[1] > this->FixedPointCroppingRegionPlanes[3])
|
|
{
|
|
idx += 6;
|
|
}
|
|
else
|
|
{
|
|
idx += 3;
|
|
}
|
|
}
|
|
|
|
if (pos[0] >= this->FixedPointCroppingRegionPlanes[0])
|
|
{
|
|
if (pos[0] > this->FixedPointCroppingRegionPlanes[1])
|
|
{
|
|
idx += 2;
|
|
}
|
|
else
|
|
{
|
|
idx += 1;
|
|
}
|
|
}
|
|
|
|
return !(static_cast<unsigned int>(this->CroppingRegionFlags) & this->CroppingRegionMask[idx]);
|
|
}
|
|
|
|
#endif
|