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    using namespace std;
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    using namespace std;
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    using namespace CGLA;
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    using namespace CGLA;
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    void flatten(Manifold& m, WeightScheme ws)
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    void flatten(Manifold& m, WeightScheme ws)
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    {
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    {
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        HalfEdgeAttributeVector<float> edge_weights(m, 0);
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        HalfEdgeAttributeVector<float> edge_weights(m.total_halfedges(), 0);
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        for(HalfEdgeIDIterator h = m.halfedges_begin(); h != m.halfedges_end(); ++h){
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        for(HalfEdgeIDIterator h = m.halfedges_begin(); h != m.halfedges_end(); ++h){
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            if(boundary(m, *h))
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            if(boundary(m, *h))
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                continue;
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                continue;
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            HalfEdgeWalker wv = m.halfedgewalker(*h);
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            HalfEdgeWalker wv = m.halfedgewalker(*h);
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                    m.pos(*v) = p_new/w_sum;
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                    m.pos(*v) = p_new/w_sum;
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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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        VertexAttributeVector<int> vtouched(m, 0);
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        VertexAttributeVector<int> vtouched(m.total_vertices(), 0);
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        i = 0;
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        i = 0;
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        for(v = m.vertices_begin(); v != m.vertices_end(); ++v, ++i){
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        for(v = m.vertices_begin(); v != m.vertices_end(); ++v, ++i){
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            ofs << "vt " << (0.5*m.pos(*v)[0]+0.5) << " " << (0.5*m.pos(*v)[1]+0.5)  << endl;
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            ofs << "vt " << (0.5*m.pos(*v)[0]+0.5) << " " << (0.5*m.pos(*v)[1]+0.5)  << endl;
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            vtouched[*v] = i;
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            vtouched[*v] = i;
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        }
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        }