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49 lines
1.2 KiB
49 lines
1.2 KiB
1 year ago
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#include "coplanar.h"
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#include "row_to_point.h"
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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Point_3.h>
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template <typename DerivedV>
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IGL_INLINE bool igl::copyleft::cgal::coplanar(
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const Eigen::MatrixBase<DerivedV> & V)
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{
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// 3 points in 3D are always coplanar
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if(V.rows() < 4){ return true; }
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// spanning points found so far
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std::vector<CGAL::Point_3<CGAL::Epick> > p;
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for(int i = 0;i<V.rows();i++)
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{
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const CGAL::Point_3<CGAL::Epick> pi(V(i,0), V(i,1), V(i,2));
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switch(p.size())
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{
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case 0:
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p.push_back(pi);
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break;
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case 1:
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if(p[0] != pi)
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{
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p.push_back(pi);
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}
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break;
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case 2:
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if(!CGAL::collinear(p[0],p[1],pi))
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{
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p.push_back(pi);
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}
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break;
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case 3:
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if(!CGAL::coplanar(p[0],p[1],p[2],pi))
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{
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return false;
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}
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break;
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}
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}
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template bool igl::copyleft::cgal::coplanar<Eigen::Matrix<double, -1, 3, 0, -1, 3> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&);
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#endif
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