libMesh
quadrature_gauss_lobatto_2D.C
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1 // The libMesh Finite Element Library.
2 // Copyright (C) 2002-2017 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
3 
4 // This library is free software; you can redistribute it and/or
5 // modify it under the terms of the GNU Lesser General Public
6 // License as published by the Free Software Foundation; either
7 // version 2.1 of the License, or (at your option) any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // Lesser General Public License for more details.
13 
14 // You should have received a copy of the GNU Lesser General Public
15 // License along with this library; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 
18 
19 
20 // Local includes
21 #include "libmesh/quadrature_gauss_lobatto.h"
22 
23 namespace libMesh
24 {
25 
26 void QGaussLobatto::init_2D(const ElemType type_in,
27  unsigned int p)
28 {
29  switch (type_in)
30  {
31  case QUAD4:
32  case QUADSHELL4:
33  case QUAD8:
34  case QUADSHELL8:
35  case QUAD9:
36  {
37  // We compute the 2D quadrature rule as a tensor
38  // product of the 1D quadrature rule.
39  QGaussLobatto q1D(1, _order);
40  q1D.init(EDGE2, p);
41  tensor_product_quad(q1D);
42  return;
43  }
44 
45  // We *could* fall back to a Gauss type rule for other types
46  // elements, but the assumption here is that the user has asked
47  // for a Gauss-Lobatto rule, i.e. a rule with integration points
48  // on the element boundary, for a reason.
49  default:
50  libmesh_error_msg("Element type not supported!:" << type_in);
51  }
52 }
53 
54 } // namespace libMesh
ElemType
Defines an enum for geometric element types.
The libMesh namespace provides an interface to certain functionality in the library.