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64 lines
2.0 KiB
64 lines
2.0 KiB
1 year ago
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#include "is_self_intersecting.h"
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#include "../../find.h"
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#include "../../doublearea.h"
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#include "../../remove_unreferenced.h"
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#include "RemeshSelfIntersectionsParam.h"
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#include "remesh_self_intersections.h"
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#include "../../collapse_edge.h"
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template <
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typename DerivedV,
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typename DerivedF>
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bool igl::copyleft::cgal::is_self_intersecting(
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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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assert(V.cols() == 3);
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assert(F.cols() == 3);
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using MatrixV = Eigen::Matrix<typename DerivedV::Scalar, Eigen::Dynamic, 3>;
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using MatrixF = Eigen::Matrix<typename DerivedF::Scalar, Eigen::Dynamic, 3>;
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const auto valid =
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igl::find((F.array() != IGL_COLLAPSE_EDGE_NULL).rowwise().any().eval());
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// Extract only the valid faces
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MatrixF FF = F(valid, Eigen::all);
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// Remove unreferneced vertices
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MatrixV VV;
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{
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Eigen::VectorXi I;
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igl::remove_unreferenced(V,MatrixF(FF),VV,FF,I);
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}
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Eigen::Matrix<typename DerivedV::Scalar,Eigen::Dynamic,1> A;
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igl::doublearea(VV,FF,A);
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if(A.minCoeff() <= 0)
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{
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return true;
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}
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if(
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(FF.array().col(0) == FF.array().col(1)).any() ||
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(FF.array().col(1) == FF.array().col(2)).any() ||
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(FF.array().col(2) == FF.array().col(0)).any())
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{
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return true;
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}
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// check for self-intersections VV,FF
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igl::copyleft::cgal::RemeshSelfIntersectionsParam params;
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params.detect_only = true;
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params.first_only = true;
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Eigen::MatrixXi IF;
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Eigen::VectorXi J,IM;
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{
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MatrixV tempV;
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MatrixF tempF;
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igl::copyleft::cgal::remesh_self_intersections(
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V,F,params,tempV,tempF,IF,J,IM);
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}
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return IF.rows() > 0;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template specialization
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template bool igl::copyleft::cgal::is_self_intersecting<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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