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5b89cb9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | #include "coplanar.h"
#include "row_to_point.h"
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Point_3.h>
template <typename DerivedV>
IGL_INLINE bool igl::copyleft::cgal::coplanar(
const Eigen::MatrixBase<DerivedV> & V)
{
// 3 points in 3D are always coplanar
if(V.rows() < 4){ return true; }
// spanning points found so far
std::vector<CGAL::Point_3<CGAL::Epick> > p;
for(int i = 0;i<V.rows();i++)
{
const CGAL::Point_3<CGAL::Epick> pi(V(i,0), V(i,1), V(i,2));
switch(p.size())
{
case 0:
p.push_back(pi);
break;
case 1:
if(p[0] != pi)
{
p.push_back(pi);
}
break;
case 2:
if(!CGAL::collinear(p[0],p[1],pi))
{
p.push_back(pi);
}
break;
case 3:
if(!CGAL::coplanar(p[0],p[1],p[2],pi))
{
return false;
}
break;
}
}
return true;
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
// generated by autoexplicit.sh
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&);
#endif
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