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

  Program:   Visualization Toolkit
  Module:    vtkFeatureEdges.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-1996 Ken Martin, Will Schroeder, Bill Lorensen.

This software is copyrighted by Ken Martin, Will Schroeder and Bill Lorensen.
The following terms apply to all files associated with the software unless
explicitly disclaimed in individual files. This copyright specifically does
not apply to the related textbook "The Visualization Toolkit" ISBN
013199837-4 published by Prentice Hall which is covered by its own copyright.

The authors hereby grant permission to use, copy, and distribute this
software and its documentation for any purpose, provided that existing
copyright notices are retained in all copies and that this notice is included
verbatim in any distributions. Additionally, the authors grant permission to
modify this software and its documentation for any purpose, provided that
such modifications are not distributed without the explicit consent of the
authors and that existing copyright notices are retained in all copies. Some
of the algorithms implemented by this software are patented, observe all
applicable patent law.

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE IS PROVIDED ON AN
"AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.


=========================================================================*/
// .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); or 3) feature edges (edges used by two triangles and whose
// dihedral angle > FeatureAngle). These edges may be extracted in any
// combination. Edges may also be "colored" (i.e., scalar values assigned)
// based on edge type.
// .SECTION See Also
// vtkFeatureVertices

#ifndef __vtkFeatureEdges_h
#define __vtkFeatureEdges_h

#include "vtkPolyToPolyFilter.h"

class vtkFeatureEdges : public vtkPolyToPolyFilter
{
public:
  vtkFeatureEdges();
  char *GetClassName() {return "vtkFeatureEdges";};
  void PrintSelf(ostream& os, vtkIndent indent);

  // 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,float,0.0,180.0);
  vtkGetMacro(FeatureAngle,float);

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

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

protected:
  // Usual data generation method
  void Execute();

  float FeatureAngle;
  int BoundaryEdges;
  int FeatureEdges;
  int NonManifoldEdges;
  int Coloring;
};

#endif


