45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Daniele Panozzo <daniele.panozzo@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 "barycentric_to_global.h"
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// For error printing
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#include <cstdio>
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#include <vector>
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namespace igl
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{
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template <typename Scalar, typename Index>
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IGL_INLINE Eigen::Matrix<Scalar,Eigen::Dynamic,Eigen::Dynamic> barycentric_to_global(
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const Eigen::Matrix<Scalar,Eigen::Dynamic,Eigen::Dynamic> & V,
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const Eigen::Matrix<Index,Eigen::Dynamic,Eigen::Dynamic> & F,
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const Eigen::Matrix<Scalar,Eigen::Dynamic,Eigen::Dynamic> & bc)
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{
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Eigen::Matrix<Scalar,Eigen::Dynamic,Eigen::Dynamic> R;
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R.resize(bc.rows(),3);
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for (unsigned i=0; i<R.rows(); ++i)
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{
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unsigned id = round(bc(i,0));
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double u = bc(i,1);
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double v = bc(i,2);
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if (id != -1)
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R.row(i) = V.row(F(id,0)) +
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((V.row(F(id,1)) - V.row(F(id,0))) * u +
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(V.row(F(id,2)) - V.row(F(id,0))) * v );
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else
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R.row(i) << 0,0,0;
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}
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return R;
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}
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}
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#ifdef IGL_STATIC_LIBRARY
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template Eigen::Matrix<double, -1, -1, 0, -1, -1> igl::barycentric_to_global<double, int>(Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<int, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&);
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#endif
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