libvtk5-dev 5.8.0-5 / usr / include / vtk-5.8 / vtkSelectEnclosedPoints.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkSelectEnclosedPoints.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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.

=========================================================================*/
// .NAME vtkSelectEnclosedPoints - mark points as to whether they are inside a closed surface
// .SECTION Description
// vtkSelectEnclosedPoints is a filter that evaluates all the input points to
// determine whether they are in an enclosed surface. The filter produces a
// (0,1) mask (in the form of a vtkDataArray) that indicates whether points 
// are outside (mask value=0) or inside (mask value=1) a provided surface.
// (The name of the output vtkDataArray is "SelectedPointsArray".)
//
// After running the filter, it is possible to query it as to whether a point 
// is inside/outside by invoking the IsInside(ptId) method.

// .SECTION Caveats
// The filter assumes that the surface is closed and manifold. A boolean flag
// can be set to force the filter to first check whether this is true. If false,
// all points will be marked outside. Note that if this check is not performed
// and the surface is not closed, the results are undefined.
//
// This filter produces and output data array, but does not modify the input 
// dataset. If you wish to extract cells or poinrs, various threshold filters
// are available (i.e., threshold the output array).

// .SECTION See Also
// vtkMaskPoints

#ifndef __vtkSelectEnclosedPoints_h
#define __vtkSelectEnclosedPoints_h

#include "vtkDataSetAlgorithm.h"

class vtkUnsignedCharArray;
class vtkCellLocator;
class vtkIdList;
class vtkGenericCell;


class VTK_GRAPHICS_EXPORT vtkSelectEnclosedPoints : public vtkDataSetAlgorithm
{
public:
  // Description
  // Standard methods for type information and printing.
  vtkTypeMacro(vtkSelectEnclosedPoints,vtkDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description
  // Instantiate this class.
  static vtkSelectEnclosedPoints *New();

  // Description:
  // Set the surface to be used to test for containment. Two methods are 
  // provided: one directly for vtkPolyData, and one for the output of a
  // filter.
  void SetSurface(vtkPolyData *pd);
  void SetSurfaceConnection(vtkAlgorithmOutput* algOutput);

  // Description:
  // Return a pointer to the enclosing surface.
  vtkPolyData *GetSurface();
  vtkPolyData *GetSurface(vtkInformationVector *sourceInfo);

  // Description:
  // By default, points inside the surface are marked inside or sent to
  // the output. If InsideOut is on, then the points outside the surface
  // are marked inside.
  vtkSetMacro(InsideOut,int);
  vtkBooleanMacro(InsideOut,int);
  vtkGetMacro(InsideOut,int);

  // Description:
  // Specify whether to check the surface for closure. If on, then the
  // algorithm first checks to see if the surface is closed and manifold.
  vtkSetMacro(CheckSurface,int);
  vtkBooleanMacro(CheckSurface,int);
  vtkGetMacro(CheckSurface,int);

  // Description:
  // Query an input point id as to whether it is inside or outside. Note that
  // the result requires that the filter execute first.
  int IsInside(vtkIdType inputPtId);

  // Description:
  // Specify the tolerance on the intersection. The tolerance is expressed
  // as a fraction of the bounding box of the enclosing surface.
  vtkSetClampMacro(Tolerance,double,0.0,VTK_LARGE_FLOAT);
  vtkGetMacro(Tolerance,double);

  // Description:
  // This is a backdoor that can be used to test many points for containment.
  // First initialize the instance, then repeated calls to IsInsideSurface()
  // can be used without rebuilding the search structures. The complete
  // method releases memory.
  void Initialize(vtkPolyData *surface);
  int IsInsideSurface(double x, double y, double z);
  int IsInsideSurface(double x[3]);
  void Complete();

protected:
  vtkSelectEnclosedPoints();
  ~vtkSelectEnclosedPoints();

  int    CheckSurface;
  int    InsideOut;
  double Tolerance;

  int IsSurfaceClosed(vtkPolyData *surface);
  vtkUnsignedCharArray *InsideOutsideArray;

  // Internal structures for accelerating the intersection test
  vtkCellLocator *CellLocator;
  vtkIdList      *CellIds;
  vtkGenericCell *Cell;
  vtkPolyData    *Surface;
  double          Bounds[6];
  double          Length;
  
  virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  virtual int FillInputPortInformation(int, vtkInformation *);

  virtual void ReportReferences(vtkGarbageCollector*);

private:
  vtkSelectEnclosedPoints(const vtkSelectEnclosedPoints&);  // Not implemented.
  void operator=(const vtkSelectEnclosedPoints&);  // Not implemented.
};

#endif

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