/usr/include/libmesh/quadrature_gauss.h is in libmesh-dev 0.7.1-2ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | // $Id: quadrature_gauss.h 3874 2010-07-02 21:57:26Z roystgnr $
// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 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 __quadrature_gauss_h__
#define __quadrature_gauss_h__
// Local includes
#include "quadrature.h"
namespace libMesh
{
/**
* This class implemenets specific orders of Gauss quadrature.
* Gauss quadrature rules of Order \p p have the property of
* integrating polynomials of degree \p p exactly.
*/
// ------------------------------------------------------------
// QGauss class definition
class QGauss : public QBase
{
public:
/**
* Constructor. Declares the order of the quadrature rule.
*/
QGauss (const unsigned int _dim,
const Order _order=INVALID_ORDER);
/**
* Destructor.
*/
~QGauss();
/**
* @returns \p QGAUSS
*/
QuadratureType type() const { return QGAUSS; }
private:
void init_1D (const ElemType _type=INVALID_ELEM,
unsigned int p_level=0);
void init_2D (const ElemType _type=INVALID_ELEM,
unsigned int p_level=0);
void init_3D (const ElemType _type=INVALID_ELEM,
unsigned int p_level=0);
/**
* The Dunavant rule is for triangles. It takes permutation points and
* weights in a specific format as input and fills the pre-sized _points and _weights
* vectors. This function is only used internally by the TRI geometric
* elements.
*/
void dunavant_rule(const Real rule_data[][4],
const unsigned int n_pts);
void dunavant_rule2(const Real* wts,
const Real* a,
const Real* b,
const unsigned int* permutation_ids,
const unsigned int n_wts);
/**
* The Keast rule is for tets. It takes permutation points and weights
* in a specific format as input and fills the pre-sized _points and _weights
* vectors. This function is only used internally by the TET geometric
* elements.
*/
void keast_rule(const Real rule_data[][4],
const unsigned int n_pts);
};
// ------------------------------------------------------------
// QGauss class members
inline
QGauss::QGauss(const unsigned int d,
const Order o) : QBase(d,o)
{
// explicitly call the init function in 1D since the
// other tensor-product rules require this one.
// note that EDGE will not be used internally, however
// if we called the function with INVALID_ELEM it would try to
// be smart and return, thinking it had already done the work.
if (_dim == 1)
init(EDGE2);
}
inline
QGauss::~QGauss()
{
}
} // namespace libMesh
#endif
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