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2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
56 lines
2.4 KiB
C++
56 lines
2.4 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 Michael Rabinovich <michaelrabinovich27@gmail.com@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 "flipped_triangles.h"
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#include "list_to_matrix.h"
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#include <vector>
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template <typename DerivedV, typename DerivedF, typename DerivedX>
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IGL_INLINE void igl::flipped_triangles(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedX> & X)
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{
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assert(V.cols() == 2 && "V should contain 2D positions");
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std::vector<typename DerivedX::Scalar> flip_idx;
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for (int i = 0; i < F.rows(); i++)
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{
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// https://www.cs.cmu.edu/~quake/robust.html
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typedef Eigen::Matrix<typename DerivedV::Scalar,1,2> RowVector2S;
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RowVector2S v1_n = V.row(F(i,0));
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RowVector2S v2_n = V.row(F(i,1));
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RowVector2S v3_n = V.row(F(i,2));
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Eigen::Matrix<typename DerivedV::Scalar,3,3> T2_Homo;
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T2_Homo.col(0) << v1_n(0),v1_n(1),1.;
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T2_Homo.col(1) << v2_n(0),v2_n(1),1.;
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T2_Homo.col(2) << v3_n(0),v3_n(1),1.;
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double det = T2_Homo.determinant();
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assert(det == det && "det should not be NaN");
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if (det < 0)
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{
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flip_idx.push_back(i);
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}
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}
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igl::list_to_matrix(flip_idx,X);
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}
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE Eigen::VectorXi igl::flipped_triangles(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F)
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{
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Eigen::VectorXi X;
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flipped_triangles(V,F,X);
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return X;
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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::flipped_triangles<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::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<int, -1, 1, 0, -1, 1> >&);
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template Eigen::Matrix<int, -1, 1, 0, -1, 1> igl::flipped_triangles<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&);
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#endif
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