60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2015 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_COMPONENTS_H
|
|
#define IGL_COMPONENTS_H
|
|
#include "igl_inline.h"
|
|
#include <Eigen/Core>
|
|
#include <Eigen/Sparse>
|
|
namespace igl
|
|
{
|
|
// Compute connected components of a graph represented by an adjacency
|
|
// matrix.
|
|
//
|
|
// Returns a component ID per vertex of the graph where connectivity is established by edges.
|
|
//
|
|
// Inputs:
|
|
// A n by n adjacency matrix
|
|
// Outputs:
|
|
// C n list of component ids (starting with 0)
|
|
// counts #components list of counts for each component
|
|
//
|
|
template <typename AScalar, typename DerivedC, typename Derivedcounts>
|
|
IGL_INLINE void vertex_components(
|
|
const Eigen::SparseMatrix<AScalar> & A,
|
|
Eigen::PlainObjectBase<DerivedC> & C,
|
|
Eigen::PlainObjectBase<Derivedcounts> & counts);
|
|
|
|
template <typename AScalar, typename DerivedC>
|
|
IGL_INLINE void vertex_components(
|
|
const Eigen::SparseMatrix<AScalar> & A,
|
|
Eigen::PlainObjectBase<DerivedC> & C);
|
|
|
|
// Compute the connected components for a mesh given its faces.
|
|
// Returns a component ID per vertex of the mesh where connectivity is established by edges.
|
|
//
|
|
// For computing connected components per face see igl::facet_components
|
|
//
|
|
//
|
|
// Inputs:
|
|
// F n by 3 list of triangle indices
|
|
// Outputs:
|
|
// C max(F) list of component ids
|
|
template <typename DerivedF, typename DerivedC>
|
|
IGL_INLINE void vertex_components(
|
|
const Eigen::MatrixBase<DerivedF> & F,
|
|
Eigen::PlainObjectBase<DerivedC> & C);
|
|
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "vertex_components.cpp"
|
|
#endif
|
|
|
|
#endif
|
|
|