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archimedean-spiral.cpp
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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: 2015-03-17 16:09:39 +0100 (Tue, 17 Mar 2015) $ by $Author: schulte $
11  * $Revision: 14447 $
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37 
38 #include <gecode/driver.hh>
39 
40 #include <gecode/minimodel.hh>
41 #include <gecode/float.hh>
42 
43 using namespace Gecode;
44 
72 protected:
75 public:
78  : FloatMaximizeScript(opt), f(*this,4,-20,20) {
79  // Post equation
80  FloatVar theta = f[0];
81  FloatVar r = f[3];
82  FloatVar x = f[1];
83  FloatVar y = f[2];
84 
85  rel(*this, theta >= 0);
86  rel(*this, theta <= 6*FloatVal::pi());
87  rel(*this, r >= 0);
88  rel(*this, r*cos(theta) == x);
89  rel(*this, r*sin(theta) == y);
90  rel(*this, r == theta);
91 
92  branch(*this,f[0],FLOAT_VAL_SPLIT_MIN());
93  }
96  : FloatMaximizeScript(share,p) {
97  f.update(*this,share,p.f);
98  }
100  virtual Space* copy(bool share) {
101  return new ArchimedeanSpiral(share,*this);
102  }
104  virtual FloatVar cost(void) const {
105  return f[0];
106  }
108  virtual void print(std::ostream& os) const {
109  os << "XY " << f[1].med() << " " << f[2].med()
110  << std::endl;
111  }
112 
113 };
114 
118 int main(int argc, char* argv[]) {
119  Options opt("ArchimedeanSpiral");
120  opt.solutions(0);
121  opt.step(0.1);
122  opt.parse(argc,argv);
123  FloatMaximizeScript::run<ArchimedeanSpiral,BAB,Options>(opt);
124  return 0;
125 }
126 
127 // STATISTICS: example-any
int main(int argc, char *argv[])
Main-function.
ArchimedeanSpiral(const Options &opt)
Actual model.
FloatVarArray f
The numbers.
Float variable array.
Definition: float.hh:1016
Computation spaces.
Definition: core.hpp:1362
Parametric base-class for scripts.
Definition: driver.hh:633
virtual void print(std::ostream &os) const
Print solution coordinates.
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
Options opt
The options.
Definition: test.cpp:101
void step(double s)
Set default step value.
Definition: options.hpp:234
NNF * r
Right subtree.
Definition: bool-expr.cpp:246
virtual FloatVar cost(void) const
Cost function.
FloatValBranch FLOAT_VAL_SPLIT_MIN(void)
Select values not greater than mean of smallest and largest value.
Definition: val.hpp:59
ArchimedeanSpiral(bool share, ArchimedeanSpiral &p)
Constructor for cloning p.
static FloatVal pi(void)
Return lower bound of .
Definition: val.hpp:118
virtual Space * copy(bool share)
Copy during cloning.
void parse(int &argc, char *argv[])
Parse options from arguments argv (number is argc)
Definition: options.cpp:331
void cos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:196
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVal n)
Propagates .
Definition: rel.cpp:47
void solutions(unsigned int n)
Set default number of solutions to search for.
Definition: options.hpp:261
Float variables.
Definition: float.hh:857
Example: Archimedean spiral
void sin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:182
BrancherHandle branch(Home home, const FloatVarArgs &x, FloatVarBranch vars, FloatValBranch vals, FloatBranchFilter bf, FloatVarValPrint vvp)
Branch over x with variable selection vars and value selection vals.
Definition: branch.cpp:43
Options for scripts
Definition: driver.hh:326