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added alternate sym_edge implementation by AF. 

the alternate implementation is used by defining the macro:
CGAL_SDG_ALTERNATE_SYMEDGE_IMPLEMENTATION_BY_AF
This commit is contained in:
Menelaos Karavelas 2010-03-26 09:25:51 +00:00
parent a732f53af6
commit aeb6c47cdb
1 changed files with 17 additions and 0 deletions
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17
Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_2.h
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@ -1094,7 +1094,24 @@ protected:
inline Edge sym_edge(const Face_handle& f, int i) const {
Face_handle f_sym = f->neighbor(i);
#ifdef CGAL_SDG_ALTERNATE_SYMEDGE_IMPLEMENTATION_BY_AF
int count = ( f_sym->neighbor(0) == f );
int i_sym = 0;
if ( f_sym->neighbor(1) == f ) {
++count;
i_sym = 1;
}
if ( f_sym->neighbor(2) == f ) {
++count;
i_sym = 2;
}
if ( count == 1 ) {
return Edge(f_sym, i_sym);
}
return Edge(f_sym, f_sym->index( f->vertex(i) ));
#else
return Edge( f_sym, f_sym->index( this->_tds.mirror_vertex(f, i) ) );
#endif
}
Edge flip(Face_handle& f, int i) {