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/*=========================================================================
Program: Visualization Toolkit
Module: vtkExtractPoints.h
Copyright (c) Kitware, Inc.
All rights reserved.
See LICENSE file 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 vtkExtractPoints
* @brief extract points within an implicit function
*
*
* vtkExtractPoints removes points that are either inside or outside of a
* vtkImplicitFunction. Implicit functions in VTK defined as function of the
* form f(x,y,z)=c, where values c<=0 are interior values of the implicit
* function. Typical examples include planes, spheres, cylinders, cones,
* etc. plus boolean combinations of these functions. (This operation
* presumes closure on the set, so points on the boundary are also considered
* to be inside.)
*
* Note that while any vtkPointSet type can be provided as input, the output is
* represented by an explicit representation of points via a
* vtkPolyData. This output polydata will populate its instance of vtkPoints,
* but no cells will be defined (i.e., no vtkVertex or vtkPolyVertex are
* contained in the output). Also, after filter execution, the user can
* request a vtkIdType* map which indicates how the input points were mapped
* to the output. A value of map[i] (where i is the ith input point) less
* than 0 means that the ith input point was removed. (See also the
* superclass documentation for accessing the removed points through the
* filter's second output.)
*
* @warning
* This class has been threaded with vtkSMPTools. Using TBB or other
* non-sequential type (set in the CMake variable
* VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly.
*
* @sa
* vtkPointCloudFilter vtkRadiusOutlierRemoval vtkStatisticalOutlierRemoval
* vtkThresholdPoints vtkImplicitFunction vtkExtractGeoemtry
* vtkFitImplicitFunction
*/
#ifndef vtkExtractPoints_h
#define vtkExtractPoints_h
#include "vtkFiltersPointsModule.h" // For export macro
#include "vtkPointCloudFilter.h"
class vtkImplicitFunction;
class vtkPointSet;
class VTKFILTERSPOINTS_EXPORT vtkExtractPoints : public vtkPointCloudFilter
{
public:
//@{
/**
* Standard methods for instantiating, obtaining type information, and
* printing information.
*/
static vtkExtractPoints *New();
vtkTypeMacro(vtkExtractPoints,vtkPointCloudFilter);
void PrintSelf(ostream& os, vtkIndent indent);
//@}
//@{
/**
* Specify the implicit function for inside/outside checks.
*/
virtual void SetImplicitFunction(vtkImplicitFunction*);
vtkGetObjectMacro(ImplicitFunction,vtkImplicitFunction);
//@}
//@{
/**
* Boolean controls whether to extract points that are inside of implicit
* function (ExtractInside == true) or outside of implicit function
* (ExtractInside == false). By default, ExtractInside is true.
*/
vtkSetMacro(ExtractInside,bool);
vtkGetMacro(ExtractInside,bool);
vtkBooleanMacro(ExtractInside,bool);
//@}
/**
* Return the MTime taking into account changes to the implicit function
*/
virtual vtkMTimeType GetMTime();
protected:
vtkExtractPoints();
~vtkExtractPoints();
vtkImplicitFunction *ImplicitFunction;
bool ExtractInside;
// All derived classes must implement this method. Note that a side effect of
// the class is to populate the PointMap. Zero is returned if there is a failure.
virtual int FilterPoints(vtkPointSet *input);
private:
vtkExtractPoints(const vtkExtractPoints&) VTK_DELETE_FUNCTION;
void operator=(const vtkExtractPoints&) VTK_DELETE_FUNCTION;
};
#endif
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