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88 lines
3.5 KiB
C++
88 lines
3.5 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 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 "remove_duplicates.h"
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#include <vector>
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//template <typename T, typename S>
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//IGL_INLINE void igl::remove_duplicates(
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// const Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic> &V,
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// const Eigen::Matrix<S, Eigen::Dynamic, Eigen::Dynamic> &F,
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// Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic> &NV,
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// Eigen::Matrix<S, Eigen::Dynamic, Eigen::Dynamic> &NF,
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// Eigen::Matrix<S, Eigen::Dynamic, 1> &I,
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// const double epsilon)
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE void igl::remove_duplicates(
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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> &NV,
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Eigen::PlainObjectBase<DerivedF> &NF,
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Eigen::Matrix<typename DerivedF::Scalar, Eigen::Dynamic, 1> &I,
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const double epsilon)
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{
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using namespace std;
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//// build collapse map
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int n = V.rows();
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I = Eigen::Matrix<typename DerivedF::Scalar, Eigen::Dynamic, 1>(n);
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I[0] = 0;
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bool *VISITED = new bool[n];
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for (int i =0; i <n; ++i)
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VISITED[i] = false;
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NV.resize(n,V.cols());
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int count = 0;
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Eigen::VectorXd d(n);
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for (int i =0; i <n; ++i)
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{
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if(!VISITED[i])
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{
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NV.row(count) = V.row(i);
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I[i] = count;
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VISITED[i] = true;
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for (int j = i+1; j <n; ++j)
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{
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if((V.row(j) - V.row(i)).norm() < epsilon)
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{
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VISITED[j] = true;
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I[j] = count;
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}
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}
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count ++;
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}
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}
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NV.conservativeResize ( count , Eigen::NoChange );
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count = 0;
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std::vector<typename DerivedF::Scalar> face;
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NF.resizeLike(F);
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for (int i =0; i <F.rows(); ++i)
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{
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face.clear();
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for (int j = 0; j< F.cols(); ++j)
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if(std::find(face.begin(), face.end(), I[F(i,j)]) == face.end())
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face.push_back(I[F(i,j)]);
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if (face.size() == size_t(F.cols()))
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{
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for (unsigned j = 0; j< F.cols(); ++j)
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NF(count,j) = face[j];
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count ++;
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}
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}
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NF.conservativeResize ( count , Eigen::NoChange );
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delete [] VISITED;
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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::remove_duplicates<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> >&, Eigen::Matrix<Eigen::Matrix<int, -1, -1, 0, -1, -1>::Scalar, -1, 1, 0, -1, 1>&, double);
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template void igl::remove_duplicates<Eigen::Matrix<double, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, 3, 1, -1, 3> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> >&, Eigen::Matrix<Eigen::Matrix<int, -1, 3, 1, -1, 3>::Scalar, -1, 1, 0, -1, 1>&, double);
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#endif
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