vertex.h

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/* Copyright (C) 2004 Luiz Velho. */

#ifndef VERTEX_H
#define VERTEX_H


namespace A48 {

class Vertex : public  Markable, public MxHeapable {
  friend class Mesh;
  friend class Face;

  int         l_;    
  Hedge*      s_;    

 public:

  Vertex() {l_ = 0; s_ = NULL;};

  int  level() { return l_; };

  bool is_bdry() { return s_->edge()->is_bdry(); };

  bool is_inbase() { return (level() == 0); };

  bool is_weld(Face *exclude = NULL) {
    int n = 0, k = 0;
    for (Hedge *e = star_first(); e != NULL; e = star_next(e), k++) {
      Face *f = e->face();
      if (f != NULL && f->weld_vertex() == this && f != exclude) n++;
    }
    return (n > 0 && k > 2);
  }

  Hedge* star_first() const { return s_; }; 

  Hedge*  star_next(Hedge* h) const {
    if (h->face() == NULL ) return NULL; // other side of boundary
    else { Hedge *n = h->next()->mate(); return (n == s_)? NULL : n; }
  }

 private:

  void set_level(int l) { l_ = l; }; 

  void set_star(Hedge* h) { s_ = h; }; 
};

}

#endif

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