node_types.hh

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/* Copyright (C) 2016, 2022 PISM Authors
 *
 * This file is part of PISM.
 *
 * PISM is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3 of the License, or (at your option) any later
 * version.
 *
 * PISM 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PISM; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef _NODE_TYPES_H_
#define _NODE_TYPES_H_
 
namespace pism {
 
//! Node types (in the map plane). These are used to implement boundary conditions in the Q1 FEM
//! code.
/**
   Note: The condition node_type > 0.5 is also used to detect "exterior" (ice-free) nodes where we
   prescribe homogeneous Dirichlet B.C. See DirichletData_*::fix_residual_homogeneous.
 
   This means that interior and boundary types should not use positive values.
 */
enum NodeType {
  NODE_INTERIOR = -1,
  NODE_BOUNDARY = 0,
  NODE_EXTERIOR = 1
};
 
namespace array {
class Scalar;
class Scalar1;
}
 
void compute_node_types(const array::Scalar1 &ice_thickness,
                        double thickness_threshold,
                        array::Scalar &result);
 
} // end of namespace pism
 
 
#endif /* _NODE_TYPES_H_ */