libvtk5-dev 5.10.1+dfsg-2.1build1 / usr / include / vtk-5.10 / vtkFeatureEdges.h

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

  Program:   Visualization Toolkit
  Module:    vtkFeatureEdges.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 vtkFeatureEdges - extract boundary, non-manifold, and/or sharp edges from polygonal data
// .SECTION Description
// vtkFeatureEdges is a filter to extract special types of edges from
// input polygonal data. These edges are either 1) boundary (used by 
// one polygon) or a line cell; 2) non-manifold (used by three or more 
// polygons); 3) feature edges (edges used by two triangles and whose
// dihedral angle > FeatureAngle); or 4) manifold edges (edges used by
// exactly two polygons). These edges may be extracted in any
// combination. Edges may also be "colored" (i.e., scalar values assigned)
// based on edge type. The cell coloring is assigned to the cell data of
// the extracted edges.

// .SECTION Caveats
// To see the coloring of the liens you may have to set the ScalarMode
// instance variable of the mapper to SetScalarModeToUseCellData(). (This
// is only a problem if there are point data scalars.)

// .SECTION See Also
// vtkExtractEdges

#ifndef __vtkFeatureEdges_h
#define __vtkFeatureEdges_h

#include "vtkPolyDataAlgorithm.h"

class vtkIncrementalPointLocator;

class VTK_GRAPHICS_EXPORT vtkFeatureEdges : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkFeatureEdges,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Construct object with feature angle = 30; all types of edges extracted
  // and colored.
  static vtkFeatureEdges *New();

  // Description:
  // Turn on/off the extraction of boundary edges.
  vtkSetMacro(BoundaryEdges,int);
  vtkGetMacro(BoundaryEdges,int);
  vtkBooleanMacro(BoundaryEdges,int);

  // Description:
  // Turn on/off the extraction of feature edges.
  vtkSetMacro(FeatureEdges,int);
  vtkGetMacro(FeatureEdges,int);
  vtkBooleanMacro(FeatureEdges,int);

  // Description:
  // Specify the feature angle for extracting feature edges.
  vtkSetClampMacro(FeatureAngle,double,0.0,180.0);
  vtkGetMacro(FeatureAngle,double);

  // Description:
  // Turn on/off the extraction of non-manifold edges.
  vtkSetMacro(NonManifoldEdges,int);
  vtkGetMacro(NonManifoldEdges,int);
  vtkBooleanMacro(NonManifoldEdges,int);

  // Description:
  // Turn on/off the extraction of manifold edges.
  vtkSetMacro(ManifoldEdges,int);
  vtkGetMacro(ManifoldEdges,int);
  vtkBooleanMacro(ManifoldEdges,int);

  // Description:
  // Turn on/off the coloring of edges by type.
  vtkSetMacro(Coloring,int);
  vtkGetMacro(Coloring,int);
  vtkBooleanMacro(Coloring,int);

  // Description:
  // Set / get a spatial locator for merging points. By
  // default an instance of vtkMergePoints is used.
  void SetLocator(vtkIncrementalPointLocator *locator);
  vtkGetObjectMacro(Locator,vtkIncrementalPointLocator);

  // Description:
  // Create default locator. Used to create one when none is specified.
  void CreateDefaultLocator();

  // Description:
  // Return MTime also considering the locator.
  unsigned long GetMTime();

protected:
  vtkFeatureEdges();
  ~vtkFeatureEdges();

  // Usual data generation method
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  int RequestUpdateExtent(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
  
  double FeatureAngle;
  int BoundaryEdges;
  int FeatureEdges;
  int NonManifoldEdges;
  int ManifoldEdges;
  int Coloring;
  vtkIncrementalPointLocator *Locator;
private:
  vtkFeatureEdges(const vtkFeatureEdges&);  // Not implemented.
  void operator=(const vtkFeatureEdges&);  // Not implemented.
};

#endif

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