77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkOpenGLVolumeTransferFunction2D.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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#ifndef vtkOpenGLVolumeTransferFunction2D_h
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#define vtkOpenGLVolumeTransferFunction2D_h
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#include "vtkImageResize.h" // for vtkImageResize
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#include "vtkOpenGLVolumeLookupTable.h"
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#include "vtkRenderingVolumeOpenGL2Module.h" // For export macro
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#include "vtkNew.h" // for vtkNew
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// Forward declarations
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class vtkOpenGLRenderWindow;
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/**
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* \brief 2D Transfer function container.
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*
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* Manages the texture fetched by the fragment shader when TransferFunction2D
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* mode is active. Update() assumes the vtkImageData instance used as source
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* is of type VTK_FLOAT and has 4 components (vtkVolumeProperty ensures this
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* is the case when the function is set).
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*
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* \sa vtkVolumeProperty::SetTransferFunction2D
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*/
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class VTKRENDERINGVOLUMEOPENGL2_EXPORT vtkOpenGLVolumeTransferFunction2D
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: public vtkOpenGLVolumeLookupTable
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{
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public:
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vtkTypeMacro(vtkOpenGLVolumeTransferFunction2D, vtkOpenGLVolumeLookupTable);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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static vtkOpenGLVolumeTransferFunction2D* New();
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protected:
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vtkOpenGLVolumeTransferFunction2D();
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/**
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* Update the internal texture object using the 2D image data
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*/
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void InternalUpdate(vtkObject* func, int blendMode, double sampleDistance, double unitDistance,
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int filterValue) override;
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/**
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* Override needs update to not test for scalar range changes since the range
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* is encoded in the vtkImageData
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*/
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bool NeedsUpdate(
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vtkObject* func, double scalarRange[2], int blendMode, double sampleDistance) override;
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/**
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* Override allocate table to do nothing as no internal table management is
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* needed.
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*/
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void AllocateTable() override;
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vtkNew<vtkImageResize> ResizeFilter;
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private:
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vtkOpenGLVolumeTransferFunction2D(const vtkOpenGLVolumeTransferFunction2D&) = delete;
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void operator=(const vtkOpenGLVolumeTransferFunction2D&) = delete;
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};
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#endif // vtkOpenGLTransferFunction2D_h
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