/usr/include/dolfin/generation/UnitCubeMesh.h is in libdolfin-dev 2017.2.0.post0-2.
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/>.
#ifndef __UNIT_CUBE_MESH_H
#define __UNIT_CUBE_MESH_H
#include <array>
#include <cstddef>
#include <dolfin/common/MPI.h>
#include <dolfin/mesh/CellType.h>
#include "BoxMesh.h"
namespace dolfin
{
/// Tetrahedral/hexahedral mesh of the 3D unit cube [0,1] x [0,1] x [0,1].
/// Given the number of cells (nx, ny, nz) in each direction, the
/// total number of tetrahedra will be 6*nx*ny*nz and the total
/// number of vertices will be (nx + 1)*(ny + 1)*(nz + 1).
class UnitCubeMesh : public BoxMesh
{
public:
/// Create a uniform finite element _Mesh_ over the unit cube
/// [0,1] x [0,1] x [0,1].
///
/// @param n (std::array<std::size_t, 3>)
/// Number of cells in each direction.
/// @param cell_type
/// Tetrahedron or hexahedron
/// @code{.cpp}
///
/// auto mesh = UnitCubeMesh::create(32, 32, 32, CellType::Type::tetrahedron);
/// @endcode
static Mesh create(std::array<std::size_t, 3> n, CellType::Type cell_type)
{ return create(MPI_COMM_WORLD, n, cell_type); }
/// Create a uniform finite element _Mesh_ over the unit cube
/// [0,1] x [0,1] x [0,1].
///
/// @param comm (MPI_Comm)
/// MPI communicator
/// @param n (std::aray<std::size_t, 3>)
/// Number of cells in each direction.
/// @param cell_type
/// Tetrahedron or hexahedron
///
/// @code{.cpp}
/// auto mesh = UnitCubeMesh::create(MPI_COMM_WORLD, {32, 32, 32}, CellType::Type::hexahedron);
/// @endcode
static Mesh create(MPI_Comm comm, std::array<std::size_t, 3> n, CellType::Type cell_type)
{ return BoxMesh::create(comm, {{Point(0.0, 0.0, 0.0), Point(1.0, 1.0, 1.0)}}, n, cell_type); }
// Temporary - part of pybind11 transition and will be
// removed. Avoid using.
static Mesh create(std::size_t nx, std::size_t ny, std::size_t nz,
CellType::Type cell_type)
{ return create({nx, ny, nz}, cell_type); }
// Temporary - part of pybind11 transition and will be
// removed. Avoid using.
static Mesh create(MPI_Comm comm, std::size_t nx, std::size_t ny, std::size_t nz,
CellType::Type cell_type)
{ return create({nx, ny, nz}, cell_type); }
/// Create a uniform finite element _Mesh_ over the unit cube
/// [0,1] x [0,1] x [0,1].
///
/// @param nx (std::size_t)
/// Number of cells in :math:`x` direction.
/// @param ny (std::size_t)
/// Number of cells in :math:`y` direction.
/// @param nz (std::size_t)
/// Number of cells in :math:`z` direction.
///
/// @code{.cpp}
///
/// UnitCubeMesh mesh(32, 32, 32);
/// @endcode
UnitCubeMesh(std::size_t nx, std::size_t ny, std::size_t nz)
: UnitCubeMesh(MPI_COMM_WORLD, nx, ny, nz) {}
/// Create a uniform finite element _Mesh_ over the unit cube
/// [0,1] x [0,1] x [0,1].
///
/// @param comm (MPI_Comm)
/// MPI communicator
/// @param nx (std::size_t)
/// Number of cells in :math:`x` direction.
/// @param ny (std::size_t)
/// Number of cells in :math:`y` direction.
/// @param nz (std::size_t)
/// Number of cells in :math:`z` direction.
///
/// @code{.cpp}
/// UnitCubeMesh mesh(MPI_COMM_WORLD, 32, 32, 32);
/// @endcode
UnitCubeMesh(MPI_Comm comm, std::size_t nx, std::size_t ny, std::size_t nz)
: BoxMesh(comm, Point(0.0, 0.0, 0.0), Point(1.0, 1.0, 1.0), nx, ny, nz) {}
};
}
#endif
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