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asinacos.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
5  *
6  * Copyright:
7  * Vincent Barichard, 2012
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9  * Last modified:
10  * $Date: 2012-07-27 02:28:31 +0200 (Fri, 27 Jul 2012) $ by $Author: vbarichard $
11  * $Revision: 12968 $
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37 
38 namespace Gecode { namespace Float { namespace Trigonometric {
39 
40  /*
41  * Bounds consistent arc sinus operator
42  *
43  */
44 
45  template<class A, class B>
47  ASin<A,B>::ASin(Home home, A x0, B x1)
48  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
49 
50  template<class A, class B>
52  ASin<A,B>::post(Home home, A x0, B x1) {
53  if (same(x0,x1)) {
54  GECODE_ME_CHECK(x0.eq(home,0.0));
55  } else {
56  GECODE_ME_CHECK(x0.gq(home,-1.0));
57  GECODE_ME_CHECK(x0.lq(home,1.0));
58  (void) new (home) ASin<A,B>(home,x0,x1);
59  }
60  return ES_OK;
61  }
62 
63 
64  template<class A, class B>
66  ASin<A,B>::ASin(Space& home, bool share, ASin<A,B>& p)
67  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p) {}
68 
69  template<class A, class B>
70  Actor*
71  ASin<A,B>::copy(Space& home, bool share) {
72  return new (home) ASin<A,B>(home,share,*this);
73  }
74 
75  template<class A, class B>
78  if ((x0.max() < -1) || (x0.min() > 1)) return ES_FAILED;
79  GECODE_ME_CHECK(x1.eq(home,asin(x0.domain())));
80  GECODE_ME_CHECK(x0.eq(home,sin(x1.domain())));
81  return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
82  }
83 
84 
85  /*
86  * Bounds consistent arc cosinus operator
87  *
88  */
89 
90  template<class A, class B>
92  ACos<A,B>::ACos(Home home, A x0, B x1)
93  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
94 
95  template<class A, class B>
97  ACos<A,B>::post(Home home, A x0, B x1) {
98  if (same(x0,x1)) {
99  GECODE_ME_CHECK(x0.gq(home,0.7390851332151));
100  GECODE_ME_CHECK(x0.lq(home,0.7390851332152));
101  bool mod;
102  do {
103  mod = false;
104  GECODE_ME_CHECK_MODIFIED(mod,x0.eq(home,acos(x0.val())));
105  } while (mod);
106  } else {
107  GECODE_ME_CHECK(x0.gq(home,-1.0));
108  GECODE_ME_CHECK(x0.lq(home,1.0));
109  (void) new (home) ACos<A,B>(home,x0,x1);
110  }
111  return ES_OK;
112  }
113 
114 
115  template<class A, class B>
117  ACos<A,B>::ACos(Space& home, bool share, ACos<A,B>& p)
118  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p) {}
119 
120  template<class A, class B>
121  Actor*
122  ACos<A,B>::copy(Space& home, bool share) {
123  return new (home) ACos<A,B>(home,share,*this);
124  }
125 
126  template<class A, class B>
127  ExecStatus
129  if ((x0.max() < -1) || (x0.min() > 1)) return ES_FAILED;
130  GECODE_ME_CHECK(x1.eq(home,acos(x0.domain())));
131  GECODE_ME_CHECK(x0.eq(home,cos(x1.domain())));
132  return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
133  }
134 
135 }}}
136 
137 // STATISTICS: float-prop
138