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122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImplicitVolume.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 vtkImplicitVolume
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* @brief treat a volume as if it were an implicit function
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*
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* vtkImplicitVolume treats a volume (e.g., structured point dataset)
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* as if it were an implicit function. This means it computes a function
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* value and gradient. vtkImplicitVolume is a concrete implementation of
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* vtkImplicitFunction.
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*
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* vtkImplicitDataSet computes the function (at the point x) by performing
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* cell interpolation. That is, it finds the cell containing x, and then
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* uses the cell's interpolation functions to compute an interpolated
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* scalar value at x. (A similar approach is used to find the
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* gradient, if requested.) Points outside of the dataset are assigned
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* the value of the ivar OutValue, and the gradient value OutGradient.
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*
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* @warning
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* The input volume data is only updated when GetMTime() is called.
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* Works for 3D structured points datasets, 0D-2D datasets won't work properly.
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*
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* @sa
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* vtkImplicitFunction vtkImplicitDataSet vtkClipPolyData vtkCutter
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* vtkImplicitWindowFunction
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*/
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#ifndef vtkImplicitVolume_h
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#define vtkImplicitVolume_h
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#include "vtkCommonDataModelModule.h" // For export macro
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#include "vtkImplicitFunction.h"
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class vtkIdList;
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class vtkImageData;
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class VTKCOMMONDATAMODEL_EXPORT vtkImplicitVolume : public vtkImplicitFunction
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{
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public:
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vtkTypeMacro(vtkImplicitVolume, vtkImplicitFunction);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Construct an vtkImplicitVolume with no initial volume; the OutValue
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* set to a large negative number; and the OutGradient set to (0,0,1).
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*/
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static vtkImplicitVolume* New();
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/**
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* Returns the mtime also considering the volume. This also calls Update
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* on the volume, and it therefore must be called before the function is
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* evaluated.
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*/
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vtkMTimeType GetMTime() override;
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//@{
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/**
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* Evaluate the ImplicitVolume. This returns the interpolated scalar value
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* at x[3].
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*/
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using vtkImplicitFunction::EvaluateFunction;
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double EvaluateFunction(double x[3]) override;
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//@}
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/**
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* Evaluate ImplicitVolume gradient.
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*/
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void EvaluateGradient(double x[3], double n[3]) override;
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//@{
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/**
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* Specify the volume for the implicit function.
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*/
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virtual void SetVolume(vtkImageData*);
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vtkGetObjectMacro(Volume, vtkImageData);
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//@}
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//@{
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/**
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* Set the function value to use for points outside of the dataset.
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*/
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vtkSetMacro(OutValue, double);
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vtkGetMacro(OutValue, double);
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//@}
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//@{
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/**
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* Set the function gradient to use for points outside of the dataset.
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*/
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vtkSetVector3Macro(OutGradient, double);
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vtkGetVector3Macro(OutGradient, double);
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//@}
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protected:
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vtkImplicitVolume();
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~vtkImplicitVolume() override;
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vtkImageData* Volume; // the structured points
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double OutValue;
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double OutGradient[3];
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// to replace a static
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vtkIdList* PointIds;
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private:
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vtkImplicitVolume(const vtkImplicitVolume&) = delete;
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void operator=(const vtkImplicitVolume&) = delete;
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};
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#endif
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