Generated on Tue Feb 11 2025 17:33:26 for Gecode by doxygen 1.12.0
archimedean-spiral.cpp
Go to the documentation of this file.
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
8 *
9 * This file is part of Gecode, the generic constraint
10 * development environment:
11 * http://www.gecode.org
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining
14 * a copy of this software and associated documentation files (the
15 * "Software"), to deal in the Software without restriction, including
16 * without limitation the rights to use, copy, modify, merge, publish,
17 * distribute, sublicense, and/or sell copies of the Software, and to
18 * permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be
22 * included in all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 *
32 */
33
34#include <gecode/driver.hh>
35
36#include <gecode/minimodel.hh>
37#include <gecode/float.hh>
38
39using namespace Gecode;
40
68protected:
71public:
74 : FloatMaximizeScript(opt), f(*this,4,-20,20) {
75 // Post equation
76 FloatVar theta = f[0];
77 FloatVar r = f[3];
78 FloatVar x = f[1];
79 FloatVar y = f[2];
80
81 rel(*this, theta >= 0);
82 rel(*this, theta <= 6*FloatVal::pi());
83 rel(*this, r >= 0);
84 rel(*this, r*cos(theta) == x);
85 rel(*this, r*sin(theta) == y);
86 rel(*this, r == theta);
87
88 branch(*this,f[0],FLOAT_VAL_SPLIT_MIN());
89 }
96 virtual Space* copy(void) {
97 return new ArchimedeanSpiral(*this);
98 }
100 virtual FloatVar cost(void) const {
101 return f[0];
102 }
104 virtual void print(std::ostream& os) const {
105 os << "XY " << f[1].med() << " " << f[2].med()
106 << std::endl;
107 }
108
109};
110
114int main(int argc, char* argv[]) {
115 Options opt("ArchimedeanSpiral");
116 opt.solutions(0);
117 opt.step(0.1);
118 opt.parse(argc,argv);
120 return 0;
121}
122
123// STATISTICS: example-any
int p
Number of positive literals for node type.
Example: Archimedean spiral
ArchimedeanSpiral(ArchimedeanSpiral &p)
Constructor for cloning p.
int main(int argc, char *argv[])
Main-function.
FloatVarArray f
The numbers.
ArchimedeanSpiral(const Options &opt)
Actual model.
virtual void print(std::ostream &os) const
Print solution coordinates.
virtual FloatVar cost(void) const
Cost function.
virtual Space * copy(void)
Copy during cloning.
Parametric base-class for scripts.
Definition driver.hh:729
static void run(const Options &opt, Script *s=NULL)
Definition script.hpp:290
static FloatVal pi(void)
Return lower bound of .
Definition val.hpp:114
Float variable array.
Definition float.hh:1030
Float variables.
Definition float.hh:870
Options for scripts
Definition driver.hh:366
Computation spaces.
Definition core.hpp:1742
void update(Space &home, VarArray< Var > &a)
Update array to be a clone of array a.
Definition array.hpp:1013
void parse(int argc, char *argv[])
Parse commandline arguments.
Definition test.cpp:120
void branch(Home home, const FloatVarArgs &x, FloatVarBranch vars, FloatValBranch vals, FloatBranchFilter bf=nullptr, FloatVarValPrint vvp=nullptr)
Branch over x with variable selection vars and value selection vals.
Definition branch.cpp:39
void rel(Home home, FloatVar x0, FloatRelType frt, FloatVar x1)
Post propagator for .
Definition rel.cpp:68
Gecode toplevel namespace
void sin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition set.hh:767
void cos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Post propagator for SetVar SetOpType SetVar y
Definition set.hh:767
Post propagator for SetVar x
Definition set.hh:767
FloatValBranch FLOAT_VAL_SPLIT_MIN(void)
Select values not greater than mean of smallest and largest value.
Definition val.hpp:55