face.h

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/**
 *\file         face.h
 *
 *              
 *\brief
 *
 *\author       Xianming Chen\n
 *              Computer Science Department\n
 *              University of Utah
 *
 *\date         15 Aug 2006\n
 *              Copyright (c) 2006, University of Utah
 */


#ifndef _FACE_H
#define _FACE_H

#include "node_fwd_dcl.h"

namespace euler
{
  class face_t
  {
  public:
      id_t id;
      solid_t *s;
      loop_t *l;
      face_t *pre, *nxt;
      vector_t eq;

  public:
      /**
       *  construct an arc at xy-plane, assume the start point of arc (e->v) is positioned at angle theta1.
       *  return the edge tailed at the last vertex.
       */
      edge_t* arc(edge_t* e, point_t const& cntr, float r, float theta1, float theta2, int segs=8);


      loop_t* kemr(edge_t* e);                //!< return created inner loop.
      edge_t* mekr(edge_t * e1, edge_t * e2); //!< return new half edge v1v2.

      loop_t* new_loop();
      loop_t* new_loop(vertex_t *v);
      void del_loop(loop_t* lp);

  private:
      friend class solid_t;
      face_t(solid_t* s) : id(cur_id++), s(s), l(0), pre(0), nxt(s->f) { }
      ~face_t();
      
      static id_t cur_id;
  };


}

#endif

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