mesh_modification.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2025 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 LIBMESH_MESH_MODIFICATION_H
#define LIBMESH_MESH_MODIFICATION_H

// Local Includes
#include "libmesh/libmesh_common.h"
#include "libmesh/id_types.h" // for boundary_id_type, subdomain_id_type
#include "libmesh/tensor_value.h"

namespace libMesh
{

// forward declarations
template <typename Output> class FunctionBase;
class MeshBase;


// ------------------------------------------------------------
// MeshTools::Modification namespace
namespace MeshTools
{
namespace Modification
{
void distort (MeshBase & mesh,
              const Real factor, const bool perturb_boundary=false);

void permute_elements (MeshBase & mesh);

void orient_elements (MeshBase & mesh);

void redistribute (MeshBase & mesh,
                   const FunctionBase<Real> & mapfunc);


void translate (MeshBase & mesh,
                const Real xt=0., const Real yt=0., const Real zt=0.);

//     /**
//      * Rotates the mesh in the xy plane. The rotation is
//      * counter-clock-wise (mathematical definition).
//      * The angle is in degrees (360 make a full circle)
//      */
//     void rotate2D (MeshBase & mesh,
//                    const Real alpha=0.);

RealTensorValue
rotate (MeshBase & mesh,
        const Real phi, const Real theta=0., const Real psi=0.);

void scale (MeshBase & mesh,
            const Real xs, const Real ys=0., const Real zs=0.);

void all_tri (MeshBase & mesh);

void smooth(MeshBase &, unsigned int, Real);

#ifdef LIBMESH_ENABLE_AMR

void flatten(MeshBase & mesh);
#endif // #ifdef LIBMESH_ENABLE_AMR

void change_boundary_id (MeshBase & mesh,
                         const boundary_id_type old_id,
                         const boundary_id_type new_id);

void change_subdomain_id (MeshBase & mesh,
                          const subdomain_id_type old_id,
                          const subdomain_id_type new_id);

} // end namespace Meshtools::Modification
} // end namespace MeshTools

} // namespace libMesh


#endif // LIBMESH_MESH_MODIFICATION_H