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surface_generator_filter.hh
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Fri, Sep 20, 23:19
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rTAMAAS tamaas
surface_generator_filter.hh
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/**
* @file
* LICENSE
*
* Copyright (©) 2016-2021 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef SURFACE_GENERATOR_FILTER_H
#define SURFACE_GENERATOR_FILTER_H
/* -------------------------------------------------------------------------- */
#include "fft_engine.hh"
#include "filter.hh"
#include "partitioner.hh"
#include "surface_generator.hh"
#include "tamaas.hh"
/* -------------------------------------------------------------------------- */
namespace
tamaas
{
template
<
UInt
dim
>
class
SurfaceGeneratorFilter
:
public
SurfaceGenerator
<
dim
>
{
public
:
/// Default constructor
using
SurfaceGenerator
<
dim
>::
SurfaceGenerator
;
/// Construct with surface size
// using SurfaceGenerator<dim>::SurfaceGenerator(std::array<UInt, dim> sizes);
public
:
/// Build surface with Hu & Tonder algorithm
Grid
<
Real
,
dim
>&
buildSurface
()
override
;
/// Set filter object
void
setFilter
(
std
::
shared_ptr
<
Filter
<
dim
>>
new_filter
)
{
setSpectrum
(
new_filter
);
}
/// Set spectrum
void
setSpectrum
(
std
::
shared_ptr
<
Filter
<
dim
>>
spectrum
)
{
filter
=
spectrum
;
}
/// Get spectrum
const
Filter
<
dim
>*
getSpectrum
()
const
{
return
filter
.
get
();
}
protected
:
/// Apply filter coefficients on white noise
void
applyFilterOnSource
();
/// Generate white noise with given distribution
template
<
typename
T
>
void
generateWhiteNoise
();
protected
:
std
::
shared_ptr
<
Filter
<
dim
>>
filter
=
nullptr
;
GridHermitian
<
Real
,
dim
>
filter_coefficients
;
Grid
<
Real
,
dim
>
white_noise
;
std
::
unique_ptr
<
FFTEngine
>
engine
=
FFTEngine
::
makeEngine
();
};
/* -------------------------------------------------------------------------- */
/* Template implementations */
/* -------------------------------------------------------------------------- */
template
<
UInt
dim
>
template
<
typename
T
>
void
SurfaceGeneratorFilter
<
dim
>::
generateWhiteNoise
()
{
random_engine
gen
(
this
->
random_seed
);
T
distribution
;
const
auto
offset
=
Partitioner
<
dim
>::
local_offset
(
white_noise
);
// Exhausting the random values of lower rank processes
for
(
UInt
i
=
0
;
i
<
offset
;
++
i
)
distribution
(
gen
);
for
(
auto
&
noise
:
white_noise
)
noise
=
distribution
(
gen
);
}
}
// namespace tamaas
#endif
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