DGtal 1.3.0
Loading...
Searching...
No Matches
Filtered2x2DetComputer.ih
1/**
2 * This program is free software: you can redistribute it and/or modify
3 * it under the terms of the GNU Lesser General Public License as
4 * published by the Free Software Foundation, either version 3 of the
5 * License, or (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program. If not, see <http://www.gnu.org/licenses/>.
14 *
15 **/
16
17/**
18 * @file Filtered2x2DetComputer.ih
19 * @author Tristan Roussillon (\c tristan.roussillon@liris.cnrs.fr )
20 * Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (CNRS, UMR 5205), CNRS, France
21 *
22 * @date 2013/11/20
23 *
24 * Implementation of inline methods defined in Filtered2x2DetComputer.h
25 *
26 * This file is part of the DGtal library.
27 */
28
29
30//////////////////////////////////////////////////////////////////////////////
31#include <cstdlib>
32//////////////////////////////////////////////////////////////////////////////
33
34///////////////////////////////////////////////////////////////////////////////
35// IMPLEMENTATION of inline methods.
36///////////////////////////////////////////////////////////////////////////////
37
38///////////////////////////////////////////////////////////////////////////////
39// ----------------------------------------------------------------------------
40
41
42///////////////////////////////////////////////////////////////////////////////
43// Interface - public :
44
45// ----------------------------------------------------------------------------
46template <typename T>
47inline
48void
49DGtal::Filtered2x2DetComputer<T>::init(const ArgumentInteger& aA, const ArgumentInteger& aB)
50{
51 myA = aA;
52 myB = aB;
53}
54
55// ----------------------------------------------------------------------------
56template <typename T>
57inline
58typename DGtal::Filtered2x2DetComputer<T>::ResultInteger
59DGtal::Filtered2x2DetComputer<T>::operator()(const ArgumentInteger& aX, const ArgumentInteger& aY) const
60{
61 ArgumentInteger det = (myA*aY - myB*aX);
62 if ( det != 0.0 )
63 { //if not zero, we can conclude because of the IEC-559 / IEEE-754 standard.
64 return (det > 0.0) ? NumberTraits<ResultInteger>::ONE : -NumberTraits<ResultInteger>::ONE;
65 }
66 else
67 { //otherwise, we must use another method.
68 myDetComputer.init(myA, myB);
69 return myDetComputer.operator()(aX, aY);
70 }
71}
72
73// ----------------------------------------------------------------------------
74template <typename T>
75inline
76typename DGtal::Filtered2x2DetComputer<T>::ResultInteger
77DGtal::Filtered2x2DetComputer<T>::operator()(const ArgumentInteger& aA, const ArgumentInteger& aB,
78 const ArgumentInteger& aX, const ArgumentInteger& aY)
79{
80 init(aA, aB);
81 return operator()(aX, aY);
82}
83
84// ----------------------------------------------------------------------------
85template <typename T>
86inline
87void
88DGtal::Filtered2x2DetComputer<T>::selfDisplay ( std::ostream & out ) const
89{
90 out << "[Filtered2x2DetComputer]";
91}
92
93// ----------------------------------------------------------------------------
94template <typename T>
95inline
96bool
97DGtal::Filtered2x2DetComputer<T>::isValid() const
98{
99 return true;
100}
101
102
103
104///////////////////////////////////////////////////////////////////////////////
105// Implementation of inline functions //
106
107template <typename T>
108inline
109std::ostream&
110DGtal::operator<< ( std::ostream & out,
111 const Filtered2x2DetComputer<T> & object )
112{
113 object.selfDisplay( out );
114 return out;
115}
116
117// //
118///////////////////////////////////////////////////////////////////////////////
119
120