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geom_helper_functions.hh
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Sat, Aug 24, 11:29
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rAKA akantu
geom_helper_functions.hh
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/**
* @file geom_helper_functions.hh
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @date creation: Wed Mar 4 2015
* @date last modification: Thu Mar 5 2015
*
* @brief Helper functions for the computational geometry algorithms
*
* @section LICENSE
*
* Copyright (©) 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef _AKANTU_GEOM_HELPER_FUNCTIONS_HH__
#define _AKANTU_GEOM_HELPER_FUNCTIONS_HH__
#include "aka_common.hh"
#include <CGAL/Cartesian.h>
__BEGIN_AKANTU__
typedef
CGAL
::
Cartesian
<
Real
>
K
;
#define EPS 1e-10
inline
bool
comparePoints
(
const
K
::
Point_3
&
a
,
const
K
::
Point_3
&
b
)
{
Math
::
setTolerance
(
EPS
);
return
Math
::
are_float_equal
(
a
.
x
(),
b
.
x
())
&&
Math
::
are_float_equal
(
a
.
y
(),
b
.
y
());
}
inline
bool
compareSegments
(
const
K
::
Segment_3
&
a
,
const
K
::
Segment_3
&
b
)
{
Math
::
setTolerance
(
EPS
);
return
(
comparePoints
(
a
.
source
(),
b
.
source
())
&&
comparePoints
(
a
.
target
(),
b
.
target
()))
||
(
comparePoints
(
a
.
source
(),
b
.
target
())
&&
comparePoints
(
a
.
target
(),
b
.
source
()));
}
struct
CompareSegmentPairs
{
bool
operator
()(
const
std
::
pair
<
K
::
Segment_3
,
UInt
>
&
a
,
const
std
::
pair
<
K
::
Segment_3
,
UInt
>
&
b
)
{
return
compareSegments
(
a
.
first
,
b
.
first
);
}
};
__END_AKANTU__
#endif
// _AKANTU_GEOM_HELPER_FUNCTIONS_HH__
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