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49 lines
2.0 KiB
49 lines
2.0 KiB
1 year ago
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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) 2020 Oded Stein <oded.stein@columbia.edu>
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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 "edge_midpoints.h"
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template<typename DerivedV,typename DerivedF,typename DerivedE,
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typename DerivedoE, typename Derivedmps>
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IGL_INLINE void
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igl::edge_midpoints(
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const Eigen::MatrixBase<DerivedV> &V,
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const Eigen::MatrixBase<DerivedF> &F,
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const Eigen::MatrixBase<DerivedE> &E,
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const Eigen::MatrixBase<DerivedoE> &oE,
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Eigen::PlainObjectBase<Derivedmps> &mps)
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{
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assert(E.rows()==F.rows() && "E does not match dimensions of F.");
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assert(oE.rows()==F.rows() && "oE does not match dimensions of F.");
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assert(E.cols()==3 && F.cols()==3 && oE.cols()==3 &&
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"This method is for triangle meshes.");
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assert(F.maxCoeff()<V.rows() && "V does not seem to belong to F.");
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using ScalarE = typename DerivedE::Scalar;
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using ScalarF = typename DerivedF::Scalar;
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const ScalarE m = E.maxCoeff()+1;
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mps.resize(m, V.cols());
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for(Eigen::Index i=0; i<F.rows(); ++i) {
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for(int j=0; j<3; ++j) {
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if(oE(i,j)<0) {
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continue;
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}
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const ScalarE e = E(i,j);
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const ScalarF vi=F(i,(j+1)%3), vj=F(i,(j+2)%3);
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mps.row(e) = 0.5*(V.row(vi) + V.row(vj));
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}
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}
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template void igl::edge_midpoints<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -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&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<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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