/usr/include/dolfin/mesh/UnitSquare.h is in libdolfin1.0-dev 1.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This file is part of DOLFIN.
//
// DOLFIN 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// First added: 2005-12-02
// Last changed: 2011-07-18
#ifndef __UNIT_SQUARE_H
#define __UNIT_SQUARE_H
#include "Mesh.h"
namespace dolfin
{
/// Triangular mesh of the 2D unit square [0,1] x [0,1].
/// Given the number of cells (nx, ny) in each direction,
/// the total number of triangles will be 2*nx*ny and the
/// total number of vertices will be (nx + 1)*(ny + 1).
///
/// std::string diagonal ("left", "right", "right/left", "left/right",
/// or "crossed") indicates the direction of the diagonals.
class UnitSquare : public Mesh
{
public:
/// Define a uniform finite element _Mesh_ over the unit square
/// [0,1] x [0,1].
///
/// *Arguments*
/// nx (uint)
/// Number of cells in horizontal direction.
/// ny (uint)
/// Number of cells in vertical direction.
/// diagonal (std::string)
/// Optional argument: A std::string indicating
/// the direction of the diagonals.
///
/// *Example*
/// .. code-block:: c++
///
/// UnitSquare mesh1(32, 32);
/// UnitSquare mesh2(32, 32, "crossed");
///
UnitSquare(uint nx, uint ny, std::string diagonal="right");
};
}
#endif
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