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asinacos.hpp
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4  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
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7  * Vincent Barichard, 2012
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33 
34 namespace Gecode { namespace Float { namespace Trigonometric {
35 
36  /*
37  * Bounds consistent arc sinus operator
38  *
39  */
40 
41  template<class A, class B>
43  ASin<A,B>::ASin(Home home, A x0, B x1)
44  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
45 
46  template<class A, class B>
48  ASin<A,B>::post(Home home, A x0, B x1) {
49  if (same(x0,x1)) {
50  GECODE_ME_CHECK(x0.eq(home,0.0));
51  } else {
52  GECODE_ME_CHECK(x0.gq(home,-1.0));
53  GECODE_ME_CHECK(x0.lq(home,1.0));
54  GECODE_ME_CHECK(x1.eq(home,asin(x0.domain())));
55  GECODE_ME_CHECK(x0.eq(home,sin(x1.domain())));
56  (void) new (home) ASin<A,B>(home,x0,x1);
57  }
58  return ES_OK;
59  }
60 
61 
62  template<class A, class B>
66 
67  template<class A, class B>
68  Actor*
70  return new (home) ASin<A,B>(home,*this);
71  }
72 
73  template<class A, class B>
76  if ((x0.max() < -1) || (x0.min() > 1)) return ES_FAILED;
77  GECODE_ME_CHECK(x1.eq(home,asin(x0.domain())));
78  GECODE_ME_CHECK(x0.eq(home,sin(x1.domain())));
79  return (x0.assigned() || x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
80  }
81 
82 
83  /*
84  * Bounds consistent arc cosinus operator
85  *
86  */
87 
88  template<class A, class B>
90  ACos<A,B>::ACos(Home home, A x0, B x1)
91  : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
92 
93  template<class A, class B>
95  ACos<A,B>::post(Home home, A x0, B x1) {
96  if (same(x0,x1)) {
97  GECODE_ME_CHECK(x0.gq(home,0.7390851332151));
98  GECODE_ME_CHECK(x0.lq(home,0.7390851332152));
99  bool mod;
100  do {
101  mod = false;
102  GECODE_ME_CHECK_MODIFIED(mod,x0.eq(home,acos(x0.val())));
103  } while (mod);
104  } else {
105  GECODE_ME_CHECK(x0.gq(home,-1.0));
106  GECODE_ME_CHECK(x0.lq(home,1.0));
107  GECODE_ME_CHECK(x1.eq(home,acos(x0.domain())));
108  GECODE_ME_CHECK(x0.eq(home,cos(x1.domain())));
109  (void) new (home) ACos<A,B>(home,x0,x1);
110  }
111  return ES_OK;
112  }
113 
114 
115  template<class A, class B>
119 
120  template<class A, class B>
121  Actor*
123  return new (home) ACos<A,B>(home,*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 
void mod(Home home, IntVar x0, IntVar x1, IntVar x2, IntPropLevel ipl)
Post propagator for .
Definition: arithmetic.cpp:263
Propagator for bounds consistent arc cosinus operator
ASin(Space &home, ASin &p)
Constructor for cloning p.
Definition: asinacos.hpp:64
ExecStatus ES_SUBSUMED(Propagator &p)
Definition: core.hpp:3482
static ExecStatus post(Home home, A x0, B x1)
Post propagator for .
Definition: asinacos.hpp:95
virtual Actor * copy(Space &home)
Create copy during cloning.
Definition: asinacos.hpp:122
virtual Actor * copy(Space &home)
Create copy during cloning.
Definition: asinacos.hpp:69
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: asinacos.hpp:75
#define forceinline
Definition: config.hpp:185
Propagation has computed fixpoint.
Definition: core.hpp:476
Computation spaces.
Definition: core.hpp:1701
#define GECODE_ME_CHECK_MODIFIED(modified, me)
Check whether me is failed or modified, and forward failure.
Definition: macros.hpp:64
Base-class for both propagators and branchers.
Definition: core.hpp:627
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:232
bool same(const ConstView< ViewA > &, const ConstView< ViewB > &)
Test whether two views are the same.
Definition: view.hpp:676
ACos(Space &home, ACos &p)
Constructor for cloning p.
Definition: asinacos.hpp:117
Execution has resulted in failure.
Definition: core.hpp:473
Propagator for bounds consistent arc sinus operator
virtual ExecStatus propagate(Space &home, const ModEventDelta &med)
Perform propagation.
Definition: asinacos.hpp:128
void asin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
#define GECODE_ME_CHECK(me)
Check whether modification event me is failed, and forward failure.
Definition: macros.hpp:52
void cos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Mixed binary propagator.
Definition: pattern.hpp:204
static ExecStatus post(Home home, A x0, B x1)
Post propagator for .
Definition: asinacos.hpp:48
ExecStatus
Definition: core.hpp:471
Execution is okay.
Definition: core.hpp:475
const Gecode::PropCond PC_FLOAT_BND
Propagate when minimum or maximum of a view changes.
Definition: var-type.hpp:292
Gecode toplevel namespace
void sin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
void acos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
int ModEventDelta
Modification event deltas.
Definition: core.hpp:89
Home class for posting propagators
Definition: core.hpp:853