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volume_potential.hh
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rTAMAAS tamaas
volume_potential.hh
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/**
* @file
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2017 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef VOLUME_POTENTIAL_HH
#define VOLUME_POTENTIAL_HH
/* -------------------------------------------------------------------------- */
#include "fft_plan_manager.hh"
#include "grid_hermitian.hh"
#include "grid_view.hh"
#include "integral_operator.hh"
#include "model_type.hh"
/* -------------------------------------------------------------------------- */
#include <functional>
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
/**
* @brief Volume potential operator class. Applies the operators for computation
* of displacements and strains due to residual/eigen strains
*/
template
<
model_type
type
>
class
VolumePotential
:
public
IntegralOperator
{
using
trait
=
model_type_traits
<
type
>
;
protected
:
using
filter_t
=
std
::
function
<
bool
(
UInt
)
>
;
public
:
VolumePotential
(
Model
*
model
);
/// Update from model (does nothing)
void
updateFromModel
()
override
{}
/// Kind
IntegralOperator
::
kind
getKind
()
const
override
{
return
IntegralOperator
::
neumann
;
}
/// Type
model_type
getType
()
const
override
;
/// Applying to all source
void
apply
(
GridBase
<
Real
>&
input
,
GridBase
<
Real
>&
output
)
const
override
{
applyIf
(
input
,
output
,
[](
UInt
)
{
return
true
;
});
}
protected
:
/// Function to handle layer-by-layer Fourier treatment of operators
template
<
typename
Func
>
void
fourierApply
(
Func
func
,
GridBase
<
Real
>&
in
,
GridBase
<
Real
>&
out
)
const
{
fourierApplyIf
(
func
,
in
,
out
,
[](
UInt
)
{
return
true
;
});
}
/// Function to handle layer-by-layer Fourier treatment of operators
template
<
typename
Func
>
void
fourierApplyIf
(
Func
func
,
GridBase
<
Real
>&
in
,
GridBase
<
Real
>&
out
,
filter_t
pred
)
const
;
/// Initialize fourier buffers
void
initialize
(
UInt
source_components
,
UInt
out_components
);
protected
:
Grid
<
Real
,
trait
::
boundary_dimension
>
wavevectors
;
using
BufferType
=
GridHermitian
<
Real
,
trait
::
boundary_dimension
>
;
mutable
std
::
vector
<
BufferType
>
source_buffer
;
mutable
std
::
vector
<
BufferType
>
disp_buffer
;
};
/* -------------------------------------------------------------------------- */
/* Template implementation */
/* -------------------------------------------------------------------------- */
template
<
model_type
type
>
template
<
typename
Func
>
void
VolumePotential
<
type
>::
fourierApplyIf
(
Func
func
,
GridBase
<
Real
>&
in
,
GridBase
<
Real
>&
out
,
filter_t
pred
)
const
{
constexpr
UInt
dim
=
trait
::
dimension
;
Grid
<
Real
,
dim
>&
i
=
dynamic_cast
<
decltype
(
i
)
>
(
in
);
Grid
<
Real
,
dim
>&
o
=
dynamic_cast
<
decltype
(
o
)
>
(
out
);
// TAMAAS_ASSERT(i.sizes().front() == o.sizes().front(),
// "Number of layers does not match");
// ^^^^ not applicable for Boussinesq
// Transforming source
for
(
UInt
layer
:
Loop
::
range
(
i
.
sizes
().
front
()))
{
if
(
not
pred
(
layer
))
continue
;
auto
in_layer
=
make_view
(
i
,
layer
);
FFTPlanManager
::
get
()
.
createPlan
(
in_layer
,
source_buffer
[
layer
])
.
forwardTransform
();
}
// Setting output buffer to zero
for
(
auto
&&
grid
:
disp_buffer
)
grid
=
0
;
// Applying operator
func
(
source_buffer
,
disp_buffer
);
// Transforming output
for
(
UInt
layer
:
Loop
::
range
(
o
.
sizes
().
front
()))
{
auto
out_layer
=
make_view
(
o
,
layer
);
FFTPlanManager
::
get
()
.
createPlan
(
out_layer
,
disp_buffer
[
layer
])
.
backwardTransform
();
}
}
__END_TAMAAS__
#endif
// VOLUME_POTENTIAL_HH
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