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element.cc
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Fri, Aug 23, 09:14
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rAKA akantu
element.cc
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/**
* @file element.cc
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date creation: Fri Jan 04 2013
* @date last modification: Sun Oct 19 2014
*
* @brief contact element classes
*
* @section LICENSE
*
* Copyright (©) 2014, 2015 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu 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.
*
* Akantu 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 Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "element.hh"
#include "aka_math.hh"
#include "aka_geometry.hh"
#if defined(AKANTU_BOOST_CHRONO) && !defined(AKANTU_NDEBUG)
# include <boost/chrono.hpp>
#endif
__BEGIN_AKANTU__
template
<>
bool
check_penetration
<
2
>
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
)
{
typedef
Point
<
2
>
point_type
;
Mesh
&
mesh
=
model
.
getMesh
();
const
Array
<
Real
>
&
x
=
model
.
getCurrentPosition
();
const
Array
<
UInt
>
&
conn
=
mesh
.
getConnectivity
(
el
->
type
);
point_type
r
(
&
x
(
node
));
// NOTE: switch on a enumerated type is a sign of a bad
// object-oriented design
switch
(
el
->
type
)
{
case
_segment_2:
{
// get element extreme points
point_type
p
(
&
x
(
conn
(
el
->
element
,
0
)));
point_type
q
(
&
x
(
conn
(
el
->
element
,
1
)));
return
left_turn
(
p
,
q
,
r
)
>
0
;
}
break
;
default
:
cout
<<
"*** ERROR *** Function signed measure in file "
<<
__FILE__
<<
", line "
<<
__LINE__
;
cout
<<
", is not implemented for element of type "
<<
el
->
type
<<
endl
;
cout
<<
"*** ABORTING *** "
<<
endl
;
exit
(
1
);
break
;
}
}
template
<>
bool
check_penetration
<
3
>
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
)
{
typedef
Point
<
3
>
point_type
;
Mesh
&
mesh
=
model
.
getMesh
();
const
Array
<
Real
>
&
x
=
model
.
getCurrentPosition
();
const
Array
<
UInt
>
&
conn
=
mesh
.
getConnectivity
(
el
->
type
);
point_type
r
(
&
x
(
node
));
// NOTE: switch on a enumerated type is a sign of a bad
// object-oriented design
switch
(
el
->
type
)
{
case
_triangle_3:
{
// get element extreme points
point_type
o
(
&
x
(
conn
(
el
->
element
,
0
)));
point_type
p
(
&
x
(
conn
(
el
->
element
,
1
)));
point_type
q
(
&
x
(
conn
(
el
->
element
,
2
)));
// get signed volume
point_type
po
=
o
-
p
;
point_type
pq
=
q
-
p
;
point_type
pr
=
r
-
p
;
// cross product
point_type
c
=
cross
(
pq
,
po
);
Real
v
=
pr
*
c
;
return
v
<
0
;
}
break
;
default
:
cout
<<
"*** ERROR *** Function signed measure in file "
<<
__FILE__
<<
", line "
<<
__LINE__
;
cout
<<
", is not implemented for element of type "
<<
el
->
type
<<
endl
;
cout
<<
"*** ABORTING *** "
<<
endl
;
exit
(
1
);
break
;
}
}
template
<>
Point
<
2
>
minimize_distance
<
2
>
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
)
{
const
UInt
d
=
2
;
typedef
Point
<
d
>
point_type
;
const
Array
<
Real
>
&
x
=
model
.
getCurrentPosition
();
point_type
r
(
&
x
(
node
));
// NOTE: switch on a enumerated type is a sign of a bad
// object-oriented design
switch
(
el
->
type
)
{
case
_segment_2:
{
#if AKANTU_OPTIMIZATION
Distance_minimzer
<
_segment_2
>
data
(
&
x
(
node
),
el
,
model
);
return
data
.
point
();
#else
AKANTU_DEBUG_ERROR
(
"To use this function you should activate the optimization at compile time"
);
return
Point
<
2
>
();
#endif
}
break
;
default
:
cout
<<
"*** ERROR *** Function signed measure in file "
<<
__FILE__
<<
", line "
<<
__LINE__
;
cout
<<
", is not implemented for element of type "
<<
el
->
type
<<
endl
;
cout
<<
"*** ABORTING *** "
<<
endl
;
exit
(
1
);
break
;
}
assert
(
false
);
return
point_type
();
// avoid compiler warning: control reaches end of non-void function
}
template
<>
Point
<
3
>
minimize_distance
<
3
>
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
)
{
const
UInt
d
=
3
;
typedef
Point
<
d
>
point_type
;
const
Array
<
Real
>
&
x
=
model
.
getCurrentPosition
();
point_type
r
(
&
x
(
node
));
// NOTE: switch on a enumerated type is a sign of a bad
// object-oriented design
switch
(
el
->
type
)
{
case
_triangle_3:
{
#if AKANTU_OPTIMIZATION
Distance_minimzer
<
_triangle_3
>
data
(
&
x
(
node
),
el
,
model
);
#if defined(AKANTU_BOOST_CHRONO) && !defined(AKANTU_NDEBUG)
typedef
boost
::
chrono
::
high_resolution_clock
clock_type
;
typedef
typename
clock_type
::
time_point
time_type
;
time_type
start
=
clock_type
::
now
();
#endif
data
.
optimize
();
#if defined(AKANTU_BOOST_CHRONO) && !defined(AKANTU_NDEBUG)
boost
::
chrono
::
nanoseconds
ns
=
clock_type
::
now
()
-
start
;
cout
<<
data
.
iterations
()
<<
"
\t
"
<<
ns
.
count
()
<<
endl
;
#endif
// cout<<data.point()<<endl;
return
data
.
point
();
#else
AKANTU_DEBUG_ERROR
(
"To use this function you should activate the optimization at compile time"
);
return
Point
<
3
>
();
#endif
// const UInt nb_nodes = 3;
//
// // get triangle coordinates from element and point coordinates
// Mesh& mesh = model.getMesh();
// std::vector<point_type> pts(nb_nodes);
//
// const Array<UInt> &conn = mesh.getConnectivity(el->type);
// for (UInt i=0; i<nb_nodes; ++i)
// for (UInt j=0; j<d; ++j)
// pts.at(i)[j] = x(conn(el->element,i),j);
//
// // get closest point
// time_type start = clock_type::now();
//
// Point<3> q = naive_closest_point_to_triangle(r,pts[0],pts[1],pts[2]);
//
// boost::chrono::nanoseconds ns = clock_type::now() - start;
// cout<<ns.count()<<endl;
//
//// static unsigned int k = 0;
//// if (sqrt((q - data.point()).sq_norm()) > 1e-2) {
//// cout<<++k<<endl;
//// cout<<"difference"<<endl;
//// cout<<data.point()<<endl;
//// cout<<q<<endl;
//// cout<<" iter -> "<<data.iterations()<<endl;
//// }
//
//
// return q;
// const UInt nb_nodes = 3;
//
// // get triangle coordinates from element and point coordinates
// Mesh& mesh = model.getMesh();
// std::vector<point_type> pts(nb_nodes);
//
// const Array<UInt> &conn = mesh.getConnectivity(el->type);
// for (UInt i=0; i<nb_nodes; ++i)
// for (UInt j=0; j<d; ++j)
// pts.at(i)[j] = x(conn(el->element,i),j);
//
// // get closest point
// time_type start2 = clock_type::now();
//
// Point<3> q = closest_point_to_triangle(r,pts[0],pts[1],pts[2]);
//
// boost::chrono::nanoseconds ns2 = clock_type::now() - start2;
// cout<<ns2.count()<<endl;
// cout<<q<<endl;
//
// static unsigned int k = 0;
// Real diff = sqrt((q - data.point()).sq_norm());
// if (diff > 1e-8) {
// cout<<"diff -> "<<diff<<endl;
// cout<<++k<<endl;
// cout<<data.point()<<endl;
// cout<<q<<endl;
// cout<<" iter -> "<<data.iterations()<<endl;
// }
//
//
// return q;
}
break
;
case
_triangle_6:
{
#if AKANTU_OPTIMIZATION
Distance_minimzer
<
_triangle_6
>
data
(
&
x
(
node
),
el
,
model
);
#if defined(AKANTU_BOOST_CHRONO) && !defined(AKANTU_NDEBUG)
time_type
start
=
clock_type
::
now
();
#endif
data
.
optimize
();
#if defined(AKANTU_BOOST_CHRONO) && !defined(AKANTU_NDEBUG)
boost
::
chrono
::
nanoseconds
ns
=
clock_type
::
now
()
-
start
;
cout
<<
data
.
iterations
()
<<
"
\t
"
<<
ns
.
count
()
<<
endl
;
#endif
return
data
.
point
();
#else
AKANTU_DEBUG_ERROR
(
"To use this function you should activate the optimization at compile time"
);
return
Point
<
3
>
();
#endif
}
break
;
default
:
cout
<<
"*** ERROR *** Function signed measure in file "
<<
__FILE__
<<
", line "
<<
__LINE__
;
cout
<<
", is not implemented for element of type "
<<
el
->
type
<<
endl
;
cout
<<
"*** ABORTING *** "
<<
endl
;
exit
(
1
);
break
;
}
assert
(
false
);
return
point_type
();
// avoid compiler warning: control reaches end of non-void function
}
__END_AKANTU__
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