60 lines
2.2 KiB
C++
60 lines
2.2 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 "false_barycentric_subdivision.h"
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#include "verbose.h"
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#include <algorithm>
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#include <igl/barycenter.h>
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template <typename Scalar, typename Index>
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IGL_INLINE void igl::false_barycentric_subdivision(
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const Eigen::PlainObjectBase<Scalar> & V,
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const Eigen::PlainObjectBase<Index> & F,
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Eigen::PlainObjectBase<Scalar> & VD,
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Eigen::PlainObjectBase<Index> & FD)
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{
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using namespace Eigen;
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// Compute face barycenter
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Eigen::MatrixXd BC;
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igl::barycenter(V,F,BC);
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// Add the barycenters to the vertices
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VD.resize(V.rows()+F.rows(),3);
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VD.block(0,0,V.rows(),3) = V;
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VD.block(V.rows(),0,F.rows(),3) = BC;
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// Each face is split four ways
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FD.resize(F.rows()*3,3);
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for (unsigned i=0; i<F.rows(); ++i)
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{
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int i0 = F(i,0);
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int i1 = F(i,1);
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int i2 = F(i,2);
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int i3 = V.rows() + i;
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Vector3i F0,F1,F2;
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F0 << i0,i1,i3;
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F1 << i1,i2,i3;
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F2 << i2,i0,i3;
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FD.row(i*3 + 0) = F0;
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FD.row(i*3 + 1) = F1;
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FD.row(i*3 + 2) = F2;
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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::false_barycentric_subdivision<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<int, -1, 3, 0, -1, 3> >&);
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template void igl::false_barycentric_subdivision<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<int, -1, -1, 0, -1, -1> >&);
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#endif
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