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https://github.com/OrcaSlicer/OrcaSlicer.git
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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.
99 lines
3.6 KiB
C++
99 lines
3.6 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 "components.h"
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#include "adjacency_matrix.h"
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#include <queue>
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#include <vector>
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template <typename AScalar, typename DerivedC, typename Derivedcounts>
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IGL_INLINE void igl::components(
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const Eigen::SparseMatrix<AScalar> & A,
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Eigen::PlainObjectBase<DerivedC> & C,
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Eigen::PlainObjectBase<Derivedcounts> & counts)
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{
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using namespace Eigen;
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using namespace std;
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assert(A.rows() == A.cols() && "A should be square.");
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const size_t n = A.rows();
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Array<bool,Dynamic,1> seen = Array<bool,Dynamic,1>::Zero(n,1);
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C.resize(n,1);
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typename DerivedC::Scalar id = 0;
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vector<typename Derivedcounts::Scalar> vcounts;
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// breadth first search
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for(int k=0; k<A.outerSize(); ++k)
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{
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if(seen(k))
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{
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continue;
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}
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queue<int> Q;
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Q.push(k);
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vcounts.push_back(0);
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while(!Q.empty())
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{
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const int f = Q.front();
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Q.pop();
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if(seen(f))
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{
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continue;
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}
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seen(f) = true;
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C(f,0) = id;
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vcounts[id]++;
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// Iterate over inside
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for(typename SparseMatrix<AScalar>::InnerIterator it (A,f); it; ++it)
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{
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const int g = it.index();
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if(!seen(g) && it.value())
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{
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Q.push(g);
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}
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}
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}
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id++;
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}
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assert((size_t) id == vcounts.size());
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const size_t ncc = vcounts.size();
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assert((size_t)C.maxCoeff()+1 == ncc);
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counts.resize(ncc,1);
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for(size_t i = 0;i<ncc;i++)
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{
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counts(i) = vcounts[i];
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}
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}
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template <typename AScalar, typename DerivedC>
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IGL_INLINE void igl::components(
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const Eigen::SparseMatrix<AScalar> & A,
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Eigen::PlainObjectBase<DerivedC> & C)
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{
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Eigen::VectorXi counts;
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return components(A,C,counts);
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}
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template <typename DerivedF, typename DerivedC>
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IGL_INLINE void igl::components(
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const Eigen::MatrixBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedC> & C)
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{
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Eigen::SparseMatrix<typename DerivedC::Scalar> A;
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adjacency_matrix(F,A);
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return components(A,C);
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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::components<bool, Eigen::Array<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<bool, 0, int> const&, Eigen::PlainObjectBase<Eigen::Array<int, -1, 1, 0, -1, 1> >&);
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template void igl::components<Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
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template void igl::components<int, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<int, 0, int> const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
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template void igl::components<int, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::SparseMatrix<int, 0, int> const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
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template void igl::components<double, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::SparseMatrix<double, 0, int> const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
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template void igl::components<Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&);
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#endif
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