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	bool obj_save(const std::string& filename, Manifold& m)
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	bool obj_save(const std::string& filename, Manifold& m)
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	{
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	{
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		ofstream os(filename.data());
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		ofstream os(filename.data());
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		if(os.bad()) return false;
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		if(os.bad()) return false;
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		int k=1;
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		int k=0;
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		vector<int> touched_vals(m.no_vertices());
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		for(VertexIter vi = m.vertices_begin(); vi != m.vertices_end(); ++vi,++k)
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		for(VertexIter vi = m.vertices_begin(); vi != m.vertices_end(); ++vi,++k)
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			{
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		{
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			touched_vals[k] = vi->touched;
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				vi->touched = k;
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			vi->touched = k+1;
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				Vec3f p = vi->pos;
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			Vec3f p = vi->pos;
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				os << "v "<< p[0] << " " << p[1] << " " << p[2] << "\n";
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			os << "v "<< p[0] << " " << p[1] << " " << p[2] << "\n";
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			}
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		}
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		for(FaceIter fi = m.faces_begin();fi != m.faces_end(); ++fi)
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		for(FaceIter fi = m.faces_begin();fi != m.faces_end(); ++fi)
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			{
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		{
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					{
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			{
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						os << "f ";
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				os << "f ";
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						os << verts[0] << " " << verts[i] << " " << verts[i+1] << "\n";
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				os << verts[0] << " " << verts[i] << " " << verts[i+1] << "\n";
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					}
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			}
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			}
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		}
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		k=0;
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		for(VertexIter vi = m.vertices_begin(); vi != m.vertices_end(); ++vi,++k)
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			vi->touched = touched_vals[k];
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			return true;
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		return true;
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	}
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	}
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}
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}