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98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkVectorDot.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 vtkVectorDot
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* @brief generate scalars from dot product of vectors and normals (e.g., show displacement plot)
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*
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* vtkVectorDot is a filter to generate point scalar values from a dataset.
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* The scalar value at a point is created by computing the dot product
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* between the normal and vector at each point. Combined with the appropriate
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* color map, this can show nodal lines/mode shapes of vibration, or a
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* displacement plot.
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*
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* Note that by default the resulting scalars are mapped into a specified
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* range. This requires an extra pass in the algorithm. This mapping pass can
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* be disabled (set MapScalars to off).
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*
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* @warning
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* This class has been threaded with vtkSMPTools. Using TBB or other
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* non-sequential type (set in the CMake variable
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* VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly.
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*/
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#ifndef vtkVectorDot_h
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#define vtkVectorDot_h
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#include "vtkDataSetAlgorithm.h"
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#include "vtkFiltersCoreModule.h" // For export macro
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class VTKFILTERSCORE_EXPORT vtkVectorDot : public vtkDataSetAlgorithm
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{
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public:
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vtkTypeMacro(vtkVectorDot, vtkDataSetAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Construct object with scalar range (-1,1).
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*/
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static vtkVectorDot* New();
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//@{
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/**
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* Enable/disable the mapping of scalars into a specified range. This will
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* significantly improve the performance of the algorithm but the resulting
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* scalar values will strictly be a function of the vector and normal
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* data. By default, MapScalars is enabled, and the output scalar
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* values will fall into the range ScalarRange.
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*/
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vtkSetMacro(MapScalars, vtkTypeBool);
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vtkGetMacro(MapScalars, vtkTypeBool);
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vtkBooleanMacro(MapScalars, vtkTypeBool);
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//@}
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//@{
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/**
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* Specify the range into which to map the scalars. This mapping only
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* occurs if MapScalars is enabled.
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*/
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vtkSetVector2Macro(ScalarRange, double);
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vtkGetVectorMacro(ScalarRange, double, 2);
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//@}
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//@{
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/**
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* Return the actual range of the generated scalars (prior to mapping).
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* Note that the data is valid only after the filter executes.
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*/
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vtkGetVectorMacro(ActualRange, double, 2);
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//@}
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protected:
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vtkVectorDot();
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~vtkVectorDot() override {}
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vtkTypeBool MapScalars;
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double ScalarRange[2];
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double ActualRange[2];
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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private:
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vtkVectorDot(const vtkVectorDot&) = delete;
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void operator=(const vtkVectorDot&) = delete;
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};
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#endif
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