/usr/include/getfem/getfem_mat_elem_type.h is in libgetfem++-dev 4.2.1~beta1~svn4635~dfsg-5ubuntu2.
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/*===========================================================================
Copyright (C) 2000-2012 Yves Renard
This file is a part of GETFEM++
Getfem++ 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 along with the GCC Runtime Library
Exception either version 3.1 or (at your option) any later version.
This program 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 and GCC Runtime Library Exception for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
As a special exception, you may use this file as it is a part of a free
software library without restriction. Specifically, if other files
instantiate templates or use macros or inline functions from this file,
or you compile this file and link it with other files to produce an
executable, this file does not by itself cause the resulting executable
to be covered by the GNU Lesser General Public License. This exception
does not however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
===========================================================================*/
/**@file getfem_mat_elem_type.h
@author Yves Renard <Yves.Renard@insa-lyon.fr>
@date December 21, 2000.
@brief Build elementary tensors descriptors, used by generic assembly.
*/
#ifndef GETFEM_MAT_ELEM_TYPE_H__
#define GETFEM_MAT_ELEM_TYPE_H__
#include "getfem_config.h"
#include "getfem_integration.h"
#include "getfem_fem.h"
namespace getfem {
enum constituant_type
{ GETFEM_BASE_, GETFEM_GRAD_, GETFEM_HESSIAN_, GETFEM_NONLINEAR_,
GETFEM_UNIT_NORMAL_, GETFEM_GRAD_GEOTRANS_, GETFEM_GRAD_GEOTRANS_INV_ };
class mat_elem_type;
typedef boost::intrusive_ptr<const mat_elem_type> pmat_elem_type;
/**
abstract class for integration of non-linear terms into the mat_elem
computations
the nonlinear term is added into the mat_elem_type via mat_elem_nonlinear
When this object is destroyed, its destructor will remove all
references to it from its internal structures.
The object must depend on one pfem (and may depend on other optional pfem)
During elementary computations, the function "prepare" is called
for each optional pfem. Then the method "compute" is called with
the main fem context.
*/
class nonlinear_elem_term {
mutable std::set<pmat_elem_type> melt_list; /* list of melt that will
* be destroyed by
* ~nonlinear_elem_term */
mutable size_type term_num_;
public :
virtual const bgeot::multi_index &sizes(size_type icv) const = 0;
virtual void compute(fem_interpolation_context& /*ctx*/,
base_tensor &/*output*/) = 0;
virtual void prepare(fem_interpolation_context& /*ctx*/,
size_type /*nl_part*/) {}
virtual ~nonlinear_elem_term();
size_type &term_num(void) const { return term_num_; }
void register_mat_elem(pmat_elem_type p) /* internal use */
{ melt_list.insert(p); }
};
typedef nonlinear_elem_term* pnonlinear_elem_term;
struct constituant {
constituant_type t;
pfem pfi;
unsigned nl_part; /* only useful with GETFEM_NONLINEAR_ : since the
nonlinear term may use more than one pfem, it will
be splitted into one "constituant" per fem
for (nl_part = 0), the mat_elem_* computations will
call nlt->compute,
for (nl_part != 0) they will call
nlt->prepare(ctx,nl_part)
*/
pnonlinear_elem_term nlt;
};
/** Description of an elementary matrix. This class
* is not to be manipulate by itself. Use pmat_elem_type and
* the functions written to produce those descriptions.
*/
class mat_elem_type
: virtual public dal::static_stored_object, public std::vector<constituant> {
protected :
bgeot::multi_index mi;
public :
bgeot::multi_index sizes(size_type) const;
bgeot::multi_index &get_mi(void) { return mi; }
const bgeot::multi_index &get_mi(void) const { return mi; }
};
/** @name functions on elementary matrix descriptions
*/
//@{
/** Give a pointer to the structure describing the elementary matrix
* which compute the integral of the basic functions described by pfi.
*/
pmat_elem_type mat_elem_base(pfem pfi);
/** Give a pointer to the structure describing the elementary matrix
* which compute the integral of the gradient of the basic functions
* described by pfi.
*/
pmat_elem_type mat_elem_grad(pfem pfi);
/** Give a pointer to the structure describing the elementary matrix
* which compute the unit normal on the boundary of the element
*/
pmat_elem_type mat_elem_unit_normal(void);
/**
Return the gradient of the geometrical transformation ("K" in
the getfem++ kernel doc.), or its pseudo-inverse (transposed(B) in the
getfem++ kernel doc.).
*/
pmat_elem_type mat_elem_grad_geotrans(bool inverted);
/** Give a pointer to the structure describing the elementary matrix
* which compute the integral of the hessian of the basic functions
* described by pfi.
*/
pmat_elem_type mat_elem_hessian(pfem pfi);
/** Give a pointer to the structure describing the elementary
matrix which compute the integral of a nonlinear term.
The pnonlinear_elem_term must not be destroyed, at any time!
vector pfi can not be empty pfi[0] is the main fem for the
pnonlinear_term.
During computations of elementary tensors in getfem_mat_elem.C,
pnonlinear_elem_term->prepare() will be called for each pfi[i>=1],
and then
pnonlinear_elem_term->compute() will be called for pfi[0]
*/
pmat_elem_type mat_elem_nonlinear(pnonlinear_elem_term,
std::vector<pfem> pfi);
/** Give a pointer to the structure describing the elementary matrix
* which computes the integral of product described by
* *a and *b.
*/
pmat_elem_type mat_elem_product(pmat_elem_type a, pmat_elem_type b);
pmat_elem_type mat_elem_empty();
//@}
} /* end of namespace getfem. */
#endif /* GETFEM_PRE_INTERPOLATION_H__ */
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