34 lines
1.5 KiB
C++
34 lines
1.5 KiB
C++
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// 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 "per_vertex_attribute_smoothing.h"
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#include <vector>
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE void igl::per_vertex_attribute_smoothing(
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const Eigen::PlainObjectBase<DerivedV>& Ain,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedV> & Aout)
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{
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std::vector<double> denominator(Ain.rows(), 0);
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Aout = DerivedV::Zero(Ain.rows(), Ain.cols());
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for (int i = 0; i < F.rows(); ++i) {
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for (int j = 0; j < 3; ++j) {
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int j1 = (j + 1) % 3;
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int j2 = (j + 2) % 3;
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Aout.row(F(i, j)) += Ain.row(F(i, j1)) + Ain.row(F(i, j2));
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denominator[F(i, j)] += 2;
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}
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}
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for (int i = 0; i < Ain.rows(); ++i)
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Aout.row(i) /= denominator[i];
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::per_vertex_attribute_smoothing<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
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#endif
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