bool triangle_triangle_intersect_shared_vertex(const Eigen::MatrixBase< DerivedV > &V, const Eigen::MatrixBase< DerivedF > &F, const int f, const int sf, const int c, const Eigen::MatrixBase< Derivedp > &p, const int g, const int sg, const typename DerivedV::Scalar epsilon)
Determine whether two triangles — which share a vertex F(f,sf) == F(g,sg) — intersect.