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Java > Open Source Codes > org > jgap > gp > function > Sine


1 /*
2  * This file is part of JGAP.
3  *
4  * JGAP offers a dual license model containing the LGPL as well as the MPL.
5  *
6  * For licencing information please see the file license.txt included with JGAP
7  * or have a look at the top of class org.jgap.Chromosome which representatively
8  * includes the JGAP license policy applicable for any file delivered with JGAP.
9  */
10 package org.jgap.gp.function;
11
12 import org.jgap.*;
13 import org.jgap.gp.*;
14 import org.jgap.gp.impl.*;
15
16 /**
17  * The sine operation.
18  *
19  * @author Klaus Meffert
20  * @since 3.0
21  */
22 public class Sine
23     extends MathCommand {
24   /** String containing the CVS revision. Read out via reflection!*/
25   private final static String JavaDoc CVS_REVISION = "$Revision: 1.5 $";
26
27   public Sine(final GPConfiguration a_conf, Class JavaDoc type)
28       throws InvalidConfigurationException {
29     super(a_conf, 1, type);
30   }
31
32   public String JavaDoc toString() {
33     return "sine &1";
34   }
35
36   /**
37    * @return textual name of this command
38    *
39    * @author Klaus Meffert
40    * @since 3.2
41    */
42   public String JavaDoc getName() {
43     return "Sine";
44   }
45
46   public float execute_float(ProgramChromosome c, int n, Object JavaDoc[] args) {
47     float f = c.execute_float(n, 0, args);
48     // clip to -10000 -> 10000
49 return (float) Math.sin(Math.max( -10000.0f, Math.min(f, 10000.0f)));
50   }
51
52   public double execute_double(ProgramChromosome c, int n, Object JavaDoc[] args) {
53     double d = c.execute_double(n, 0, args);
54     // clip to -10000 -> 10000
55 return Math.sin(Math.max( -10000.0, Math.min(d, 10000.0)));
56   }
57
58   public Object JavaDoc execute_object(ProgramChromosome c, int n, Object JavaDoc[] args) {
59     return ( (Compatible) c.execute_object(n, 0, args)).execute_sine();
60   }
61
62   protected interface Compatible {
63     public Object JavaDoc execute_sine();
64   }
65 }
66
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