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Line 856... Line 856...
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    }
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    }
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    HalfEdgeID Manifold::slit_edges(VertexAttributeVector<int>& insel)
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    HalfEdgeID Manifold::slit_edges(VertexAttributeVector<int>& insel)
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    {
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    {
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        HalfEdgeID h;
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        for(auto vid : vertices())
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        for(auto vid : vertices())
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        {
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        {
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            if(insel[vid])
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            if(insel[vid])
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            {
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            {
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                HalfEdgeID h_in = InvalidHalfEdgeID, h_out = InvalidHalfEdgeID;
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                HalfEdgeID h_in = InvalidHalfEdgeID, h_out = InvalidHalfEdgeID;
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                    w = w.circulate_vertex_ccw();
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                    w = w.circulate_vertex_ccw();
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                }
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                }
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                if(h_in != InvalidHalfEdgeID &&
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                if(h_in != InvalidHalfEdgeID &&
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                   h_out != InvalidHalfEdgeID) {
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                   h_out != InvalidHalfEdgeID) {
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                    VertexID v_new = slit_vertex(vid, h_in, h_out);
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                    VertexID v_new = slit_vertex(vid, h_in, h_out);
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                    h = walker(v_new).halfedge();
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                    	}
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                }
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            }
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            }
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        }
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        }
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        return h;
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    }
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    }
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    void Manifold::flip_edge(HalfEdgeID h)
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    void Manifold::flip_edge(HalfEdgeID h)
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    {
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    {