You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
2.0 KiB
58 lines
2.0 KiB
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2013 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_FACES_FIRST_H
|
|
#define IGL_FACES_FIRST_H
|
|
#include "igl_inline.h"
|
|
namespace igl
|
|
{
|
|
/// Reorder vertices so that vertices in face list come before
|
|
/// vertices that don't appear in the face list. This is especially useful if
|
|
/// the face list contains only surface faces and you want surface vertices
|
|
/// listed before internal vertices
|
|
///
|
|
///
|
|
/// @tparam MatV matrix for vertex positions, e.g. MatrixXd
|
|
/// @tparam MatF matrix for face indices, e.g. MatrixXi
|
|
/// @tparam VecI vector for index map, e.g. VectorXi
|
|
/// @param[in] V # vertices by 3 vertex positions
|
|
/// @param[in] F # faces by 3 list of face indices
|
|
/// @param[out] RV # vertices by 3 vertex positions, order such that if the jth vertex is
|
|
/// some face in F, and the kth vertex is not then j comes before k
|
|
/// @param[out] RF # faces by 3 list of face indices, reindexed to use RV
|
|
/// @param[out] IM #V by 1 list of indices such that: RF = IM(F) and RT = IM(T)
|
|
/// and RV(IM,:) = V
|
|
///
|
|
///
|
|
/// #### Example:
|
|
/// \code{cpp}
|
|
/// // Tet mesh in (V,T,F)
|
|
/// faces_first(V,F,IM);
|
|
/// T = T.unaryExpr(bind1st(mem_fun( static_cast<VectorXi::Scalar&
|
|
/// (VectorXi::*)(VectorXi::Index)>(&VectorXi::operator())),
|
|
/// &IM)).eval();
|
|
/// \endcode
|
|
template <typename MatV, typename MatF, typename VecI>
|
|
IGL_INLINE void faces_first(
|
|
const MatV & V,
|
|
const MatF & F,
|
|
MatV & RV,
|
|
MatF & RF,
|
|
VecI & IM);
|
|
/// \overload
|
|
template <typename MatV, typename MatF, typename VecI>
|
|
IGL_INLINE void faces_first(
|
|
MatV & V,
|
|
MatF & F,
|
|
VecI & IM);
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "faces_first.cpp"
|
|
#endif
|
|
|
|
#endif
|
|
|