/usr/include/libmesh/edge_edge4.h is in libmesh-dev 0.7.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __edge4_h__
#define __edge4_h__
// Local includes
#include "libmesh_common.h"
#include "edge.h"
namespace libMesh
{
/**
* The \p Edge4 is an element in 1D composed of 4 nodes. It is numbered
* like this:
*
* \verbatim
* EGDE4: o----o----o----o
* 0 2 3 1
* \endverbatim
*/
// ------------------------------------------------------------
// Edge4 class definition
class Edge4 : public Edge
{
public:
/**
* Constructor. By default this element has no parent.
*/
Edge4 (Elem* p=NULL) :
Edge(Edge4::n_nodes(), p) {}
/**
* Constructor. Explicitly specifies the number of
* nodes and neighbors for which storage will be allocated.
*/
Edge4(const unsigned int nn,
const unsigned int ns,
Elem* p) :
Edge(nn, p) { libmesh_assert (ns == 0); }
/**
* @returns 4
*/
unsigned int n_nodes() const { return 4; }
/**
* @returns 2
*/
unsigned int n_sub_elem() const { return 2; }
/**
* @returns true iff the specified (local) node number is a vertex.
*/
virtual bool is_vertex(const unsigned int i) const;
/**
* @returns true iff the specified (local) node number is an edge.
*/
virtual bool is_edge(const unsigned int i) const;
/**
* @returns true iff the specified (local) node number is a face.
*/
virtual bool is_face(const unsigned int i) const;
/*
* @returns true iff the specified (local) node number is on the
* specified side
*/
virtual bool is_node_on_side(const unsigned int n,
const unsigned int s) const;
/*
* @returns true iff the specified (local) node number is on the
* specified edge (i.e. "returns true" in 1D)
*/
virtual bool is_node_on_edge(const unsigned int n,
const unsigned int e) const;
/*
* @returns true iff the element map is definitely affine within
* numerical tolerances
*/
virtual bool has_affine_map () const;
/**
* @returns \p EDGE4
*/
ElemType type() const { return EDGE4; }
/**
* @returns THIRD
*/
Order default_order() const { return THIRD; }
virtual void connectivity(const unsigned int sc,
const IOPackage iop,
std::vector<unsigned int>& conn) const;
/**
*/
unsigned int n_second_order_adjacent_vertices (const unsigned int) const
{ libmesh_error(); return 0; }
/**
*/
unsigned short int second_order_adjacent_vertex (const unsigned int,
const unsigned int) const
{ libmesh_error(); return 0; }
#ifdef LIBMESH_ENABLE_INFINITE_ELEMENTS
/**
* @returns \p false. This is a finite element.
*/
bool infinite () const { return false; }
#endif
protected:
#ifdef LIBMESH_ENABLE_AMR
/**
* Matrix used to create the elements children.
*/
float embedding_matrix (const unsigned int i,
const unsigned int j,
const unsigned int k) const
{ return _embedding_matrix[i][j][k]; }
/**
* Matrix that computes new nodal locations/solution values
* from current nodes/solution.
*/
static const float _embedding_matrix[2][4][4];
#endif
};
} // namespace libMesh
#endif
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