qancestor.h

来自「算断裂的」· C头文件 代码 · 共 67 行

// ------------------------------------------------------------------
// qancestor.h
//
// This file contains a class for lookup up ancestors of topological
// faces of a brep.
// ------------------------------------------------------------------
// Author: Stephen A. Vavasis
// Copyright (c) 1999 by Cornell University.  All rights reserved.
// 
// See the accompanying file 'Copyright' for authorship information,
// the terms of the license governing this software, and disclaimers
// concerning this software.
// ------------------------------------------------------------------
// This file is part of the QMG software.  
// Version 2.0 of QMG, release date September 3, 1999.
// ------------------------------------------------------------------


#ifndef QANCESTOR_H
#define QANCESTOR_H


#include "qbrep.h"



// sample usage of this class is as follows.  Suppose g is 
// a brep and fspec is a facespec of that brep.  Then we say
//   Ancestor_Lookup anc_lookup(g);
//   for (Ancestor_Lookup::Loop_over_ancestors aloop(anc_lookup,fspec);
//   aloop.notdone();
//   ++aloop) {
//            ... do something with aloop.ancestor_fspec();
//   }


class QMG::Brep::Ancestor_Lookup {
private:
  typedef map<Face_Spec, int> OneTableType;
  typedef map<Face_Spec, OneTableType > TableType;
  TableType lookup_tab_;
public:
  explicit Ancestor_Lookup(const Brep& g);
  class Loop_over_ancestors;
  friend class Loop_over_ancestors;
  class Loop_over_ancestors {
  private:
    Face_Spec thisspec_;
    OneTableType::const_iterator current_;
    OneTableType::const_iterator end_;
    const Ancestor_Lookup& anc_;
  public:
    Loop_over_ancestors(const Ancestor_Lookup& anc, const Brep::Face_Spec& fspec);
    bool notdone() const {return current_ != end_;}
    void operator++() {++current_;}
    const Face_Spec& ancestor_fspec() const {return current_ -> first;}
    int occurrence_count() const {return current_ -> second;}
  };

};




#endif