ButterflySubdivision.h

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/*****
 * ButterflySubdivision.h
 *
 * This class implements Butterfly subdivision
 *
 * author: Ed Bachta
 */

#ifndef __BUTTERFLYSUBDIVISION_H__
#define __BUTTERFLYSUBDIVISION_H__

#include "libgm/gm.h"
#include "Subdiv/Subdiv.h"
#include "mesh/indexEdge.h"
#include "mesh/indexFace.h"
#include "mesh/mesh.h"

class ButterflySubdivision : public Subdivision {

private:

  double weight;

  int getOpposingVertexInfo(gmVector3&, 
                            gmVector3&, 
                            indexEdge*, 
                            indexFace*, 
                            U32); 
 
  // This can be overridden to implement modified butterfly subdivision
  virtual void divideEdge(gmVector3&,
                          gmVector3&,
                          indexEdge*, 
                          indexFace*, 
                          U32);

  void divideFace(indexFace*, Mesh*);
  //void subdivide(mesh *, U32);

public:
  ButterflySubdivision(double w=0.0);

  void subdivide(Mesh*, U32);
  virtual void compute(int n);
  virtual int matrix(int* n, double *s) { return 0; }

};

#endif 

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