40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "avg_edge_length.h"
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#include "edges.h"
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#include <vector>
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE double igl::avg_edge_length(
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const Eigen::MatrixBase<DerivedV>& V,
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const Eigen::MatrixBase<DerivedF>& F)
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{
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typedef typename DerivedF::Scalar Index;
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Eigen::Matrix<Index, Eigen::Dynamic, 2> E;
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igl::edges(F, E);
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double avg = 0;
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for (unsigned i=0;i<E.rows();++i)
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{
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avg += (V.row(E(i,0)) - V.row(E(i,1))).norm();
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}
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return avg / (double) E.rows();
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template double igl::avg_edge_length<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&);
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template double igl::avg_edge_length<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&);
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// generated by autoexplicit.sh
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#endif
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