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Rev 129 Rev 183
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		void check_boundary_consistency(VertexIter v)
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		void check_boundary_consistency(VertexIter v)
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		{
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		{
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				HalfEdgeIter h = v->he;
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				HalfEdgeIter h = v->he;
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				HalfEdgeIter h0 = h;
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				HalfEdgeIter h0 = h;
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#ifndef NDEBUG
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				int k=0;
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#endif
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				while(h->face != NULL_FACE_ITER)
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				while(h->face != NULL_FACE_ITER)
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				{
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				{
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						assert(h->prev != NULL_HALFEDGE_ITER);
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						assert(h->prev->opp != NULL_HALFEDGE_ITER);
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#ifndef NDEBUG
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						if(++k == 1e6)
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						{
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								cout << __FILE__ << __LINE__
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										 << " : Oops infinite loop around vertex" << endl;
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								return;
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						}
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#endif
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						h = h->prev->opp;
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						h = h->prev->opp;
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						if(h==h0) return;
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						if(h==h0) return;
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				}
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				}
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				v->he = h;
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				v->he = h;
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				HalfEdgeIter h_opp = v->he->opp;
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				HalfEdgeIter h_opp = h->opp;
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				while(h_opp->face != NULL_FACE_ITER)
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				while(h_opp->face != NULL_FACE_ITER)
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						h_opp = h_opp->next->opp;
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						h_opp = h_opp->next->opp;
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				h_opp->next = h;
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				h_opp->vert = v;
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				h->prev = h_opp;
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				link(h_opp,h);
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		}
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		}
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		int valency(VertexIter v)
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		int valency(VertexIter v)
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		{
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		{
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				VertexCirculator vc(v);
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				VertexCirculator vc(v);