52 lines
2.3 KiB
C++
52 lines
2.3 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) 2014 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 "local_basis.h"
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#include <sstream>
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#include <string>
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#include <fstream>
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#include <vector>
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#include <Eigen/Geometry>
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE void igl::local_basis(
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const Eigen::PlainObjectBase<DerivedV>& V,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedV>& B1,
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Eigen::PlainObjectBase<DerivedV>& B2,
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Eigen::PlainObjectBase<DerivedV>& B3
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)
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{
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using namespace Eigen;
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using namespace std;
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B1.resize(F.rows(),3);
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B2.resize(F.rows(),3);
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B3.resize(F.rows(),3);
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for (unsigned i=0;i<F.rows();++i)
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{
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Eigen::Matrix<typename DerivedV::Scalar, 1, 3> v1 = (V.row(F(i,1)) - V.row(F(i,0))).normalized();
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Eigen::Matrix<typename DerivedV::Scalar, 1, 3> t = V.row(F(i,2)) - V.row(F(i,0));
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Eigen::Matrix<typename DerivedV::Scalar, 1, 3> v3 = v1.cross(t).normalized();
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Eigen::Matrix<typename DerivedV::Scalar, 1, 3> v2 = v1.cross(v3).normalized();
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B1.row(i) = v1;
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B2.row(i) = -v2;
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B3.row(i) = v3;
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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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// generated by autoexplicit.sh
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template void igl::local_basis<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> >&);
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template void igl::local_basis<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> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&);
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#endif
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