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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2014 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_IS_EDGE_MANIFOLD_H
#define IGL_IS_EDGE_MANIFOLD_H
#include "igl_inline.h"
#include <Eigen/Core>
namespace igl
{
// check if the mesh is edge-manifold (every edge is incident one one face
// (boundary) or two oppositely oriented faces).
//
// Inputs:
// F #F by 3 list of triangle indices
// Returns true iff all edges are manifold
//
// See also: is_vertex_manifold
template <typename DerivedF>
IGL_INLINE bool is_edge_manifold(
const Eigen::MatrixBase<DerivedF>& F);
// Inputs:
// F #F by 3 list of triangle indices
// Outputs:
// BF #F by 3 list of flags revealing if edge opposite corresponding vertex
// is non-manifold.
// E #E by 2 list of unique edges
// EMAP 3*#F list of indices of opposite edges in "E"
// BE #E list of flages whether edge is non-manifold
template <
typename DerivedF,
typename DerivedBF,
typename DerivedE,
typename DerivedEMAP,
typename DerivedBE>
IGL_INLINE bool is_edge_manifold(
const Eigen::MatrixBase<DerivedF>& F,
Eigen::PlainObjectBase<DerivedBF>& BF,
Eigen::PlainObjectBase<DerivedE>& E,
Eigen::PlainObjectBase<DerivedEMAP>& EMAP,
Eigen::PlainObjectBase<DerivedBE>& BE);
// Inputs:
// F #F by 3 list of triangle indices
// ne number of edges (#E)
// EMAP 3*#F list of indices of opposite edges in "E"
// Outputs:
// BF #F by 3 list of flags revealing if edge opposite corresponding vertex
// is non-manifold.
// BE ne list of flages whether edge is non-manifold
template <
typename DerivedF,
typename DerivedEMAP,
typename DerivedBF,
typename DerivedBE>
IGL_INLINE bool is_edge_manifold(
const Eigen::MatrixBase<DerivedF>& F,
const typename DerivedF::Index ne,
const Eigen::MatrixBase<DerivedEMAP>& EMAP,
Eigen::PlainObjectBase<DerivedBF>& BF,
Eigen::PlainObjectBase<DerivedBE>& BE);
}
#ifndef IGL_STATIC_LIBRARY
# include "is_edge_manifold.cpp"
#endif
#endif