66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 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 "in_element.h"
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template <typename DerivedV, typename DerivedQ, int DIM>
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IGL_INLINE void igl::in_element(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::MatrixXi & Ele,
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const Eigen::PlainObjectBase<DerivedQ> & Q,
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const AABB<DerivedV,DIM> & aabb,
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Eigen::VectorXi & I)
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{
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using namespace std;
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using namespace Eigen;
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const int Qr = Q.rows();
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I.setConstant(Qr,1,-1);
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#pragma omp parallel for if (Qr>10000)
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for(int e = 0;e<Qr;e++)
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{
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// find all
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const auto R = aabb.find(V,Ele,Q.row(e).eval(),true);
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if(!R.empty())
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{
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I(e) = R[0];
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}
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}
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}
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template <typename DerivedV, typename DerivedQ, int DIM, typename Scalar>
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IGL_INLINE void igl::in_element(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::MatrixXi & Ele,
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const Eigen::PlainObjectBase<DerivedQ> & Q,
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const AABB<DerivedV,DIM> & aabb,
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Eigen::SparseMatrix<Scalar> & I)
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{
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using namespace std;
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using namespace Eigen;
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const int Qr = Q.rows();
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std::vector<Triplet<Scalar> > IJV;
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IJV.reserve(Qr);
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#pragma omp parallel for if (Qr>10000)
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for(int e = 0;e<Qr;e++)
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{
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// find all
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const auto R = aabb.find(V,Ele,Q.row(e).eval(),false);
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for(const auto r : R)
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{
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#pragma omp critical
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IJV.push_back(Triplet<Scalar>(e,r,1));
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}
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}
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I.resize(Qr,Ele.rows());
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I.setFromTriplets(IJV.begin(),IJV.end());
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::in_element<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 2>(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::Matrix<int, -1, -1, 0, -1, -1> const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, igl::AABB<Eigen::Matrix<double, -1, -1, 0, -1, -1>, 2> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1>&);
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template void igl::in_element<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 3>(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::Matrix<int, -1, -1, 0, -1, -1> const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, igl::AABB<Eigen::Matrix<double, -1, -1, 0, -1, -1>, 3> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1>&);
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#endif
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