43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2017 Alec Jacobson <alecjacobson@gmail.com>
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public License
|
|
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
|
// obtain one at http://mozilla.org/MPL/2.0/.
|
|
#ifndef IGL_ORIENTED_FACETS_H
|
|
#define IGL_ORIENTED_FACETS_H
|
|
#include "igl_inline.h"
|
|
#include <Eigen/Dense>
|
|
namespace igl
|
|
{
|
|
// ORIENTED_FACETS Determines all "directed
|
|
// [facets](https://en.wikipedia.org/wiki/Simplex#Elements)" of a given set of
|
|
// simplicial elements. For a manifold triangle mesh, this computes all
|
|
// half-edges. For a manifold tetrahedral mesh, this computes all half-faces.
|
|
//
|
|
// Inputs:
|
|
// F #F by simplex_size list of simplices
|
|
// Outputs:
|
|
// E #E by simplex_size-1 list of facets, such that E.row(f+#F*c) is the
|
|
// facet opposite F(f,c)
|
|
//
|
|
// Note: this is not the same as igl::edges because this includes every
|
|
// directed edge including repeats (meaning interior edges on a surface will
|
|
// show up once for each direction and non-manifold edges may appear more than
|
|
// once for each direction).
|
|
//
|
|
// Note: This replaces the deprecated `all_edges` function
|
|
template <typename DerivedF, typename DerivedE>
|
|
IGL_INLINE void oriented_facets(
|
|
const Eigen::MatrixBase<DerivedF> & F,
|
|
Eigen::PlainObjectBase<DerivedE> & E);
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "oriented_facets.cpp"
|
|
#endif
|
|
|
|
#endif
|
|
|