NEAT_Template/Link.java at master · Ltcas/NEAT_Template · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
package NEAT;

import java.util.Random;

/**
 * Class that models the links between nodes in our network.
 * @author Chance Simmons and Brandon Townsend
 * @version 25 February 2019
 */
public class Link {
    /** The weight of the connection between the input and output nodes. */
    private double weight;

    /** The node our connection is coming from. */
    private Node input;

    /** The node our connection is going to. */
    private Node output;

    /**Used to show if the link is enabled or not */
    private boolean enabled;

    /** The innovation number of this link */
    private int innovationNum;

    /**
     * Constructor for a Link object. Creates it based on a passed in weight, input, and output
     * node.
     * @param in The specified input node for this connection.
     * @param out The specified output node for this connection.
     * @param innovationNum The specified innovation number of this link.
     */
    public Link(Node in, Node out,int innovationNum) {
        Random weightGenerator = new Random();
        this.weight = weightGenerator.nextDouble() * 2 - 1;
        this.input  = in;
        this.output = out;
        this.enabled = true;
        this.innovationNum = innovationNum;
    }

    /**
     * Returns the weight of this connection link.
     * @return The weight of this connection link.
     */
    public double getWeight() {
        return weight;
    }

    /**
     * Gets the innovation number for this link
     * @return the innovation number
     */
    public int getInnovationNum(){
        return this.innovationNum;
    }

    /**
     * Used to adjust the weight of this connection link.
     * @param weight The new weight this link should be set to.
     */
    public void setWeight(double weight) {
        this.weight = weight;
    }

    /**
     * Returns the input node for this connection link.
     * @return The input node for this connection link.
     */
    public Node getInput() {
        return input;
    }

    /**
     * Sets a new input node for this connection link.
     * @param input The specified node to be the new input node.
     */
    public void setInput(Node input) {
        this.input = input;
    }

    /**
     * Returns the output node for this connection link.
     * @return The output node for this connection link.
     */
    public Node getOutput() {
        return output;
    }

    /**
     * Returns the value of enabled
     * @return true if the link is enabled
     */
    public boolean isEnabled(){
        return enabled;
    }

    /**
     * Sets whether or not this Link is enabled.
     * @param enabled Whether this Link is enabled or not.
     */
    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    /**
     * Sets a new output node for this connection link.
     * @param output The specified node to be the new input node.
     */
    public void setOutput(Node output) {
        this.output = output;
    }

    /**
     * Checks to see if the object passed in is equal to this link
     * @param o the object to check the equality of
     * @return true if the object is equal to this link.
     */
    @Override
    public boolean equals(Object o) {
        if (o instanceof Link) {
            Link link = (Link) o;
            return link.getInnovationNum() == this.getInnovationNum();
        }
        return false;
    }
}