Coverage Summary for Class: CollisionManager (com.mygdx.game.Managers)

1 package com.mygdx.game.Managers;
2 
3 import com.badlogic.gdx.physics.box2d.*;
4 import com.mygdx.game.Entitys.Entity;
5 import com.mygdx.game.Physics.CollisionCallBack;
6 import com.mygdx.game.Physics.CollisionInfo;
7 
8 /**
9  * Handels collision callbacks for box2d
10  */
11 public class CollisionManager implements ContactListener {
12     private static boolean initialized = false;
13 
14     public CollisionManager() {
15         if (initialized) {
16             throw new RuntimeException("Collision manager cant be instantiated more then once");
17         }
18         initialized = true;
19     }
20 
21     /**
22      * called for every contact that box2d detects prior to collision restitution (doesn't matter if it is a trigger/sensor)
23      *
24      * @param contact the contact data
25      */
26     @Override
27     public void beginContact(Contact contact) {
28         // generally calls the correct callback on the appropriate objects (not as intuitive as id like though)
29         Fixture fa = contact.getFixtureA();
30         Body ba = fa.getBody();
31         Object oa = ba.getUserData();
32         CollisionCallBack cbA = (CollisionCallBack) oa;
33 
34         Fixture fb = contact.getFixtureB();
35         Body bb = fb.getBody();
36         Object ob = bb.getUserData();
37         CollisionCallBack cbB = (CollisionCallBack) ob;
38 
39         final CollisionInfo info = new CollisionInfo();
40         info.fA = fa;
41         info.fB = fb;
42 
43         info.bA = ba;
44         info.bB = bb;
45 
46         info.a = (Entity) cbA;
47         info.b = (Entity) cbB;
48 
49         if (cbA != null) {
50             // fa is sensor but not fb
51             if (fa.isSensor() && cbB != null && !fb.isSensor()) {
52                 cbB.EnterTrigger(info);
53             } else {
54                 cbA.BeginContact(info);
55             }
56         }
57 
58         if (cbB != null) {
59             if (fb.isSensor() && cbA != null && !fa.isSensor()) {
60                 cbA.EnterTrigger(info);
61             } else {
62                 cbB.BeginContact(info);
63             }
64         }
65     }
66 
67     /**
68      * called for every contact that box2d detects after collision restitution (doesn't matter if it is a trigger/sensor)
69      *
70      * @param contact the contact data
71      */
72     @Override
73     public void endContact(Contact contact) {
74         // generally calls the correct callback on the appropriate objects (not as intuitive as id like though)
75         Fixture fa = contact.getFixtureA();
76         Body ba = fa.getBody();
77         Object oa = ba.getUserData();
78         CollisionCallBack cbA = (CollisionCallBack) oa;
79 
80         Fixture fb = contact.getFixtureB();
81         Body bb = fb.getBody();
82         Object ob = bb.getUserData();
83         CollisionCallBack cbB = (CollisionCallBack) ob;
84 
85         final CollisionInfo info = new CollisionInfo();
86         info.fA = fa;
87         info.fB = fb;
88 
89         info.bA = ba;
90         info.bB = bb;
91 
92         info.a = (Entity) cbA;
93         info.b = (Entity) cbB;
94 
95         if (cbA != null) {
96             if (fa.isSensor() && cbB != null && !fb.isSensor()) {
97                 cbB.ExitTrigger(info);
98             } else {
99                 cbA.EndContact(info);
100             }
101         }
102 
103         if (cbB != null) {
104             if (fb.isSensor() && cbA != null && !fa.isSensor()) {
105                 cbA.ExitTrigger(info);
106             } else {
107                 cbB.EndContact(info);
108             }
109         }
110     }
111 
112     @Override
113     public void preSolve(Contact contact, Manifold oldManifold) {
114 
115     }
116 
117     @Override
118     public void postSolve(Contact contact, ContactImpulse impulse) {
119 
120     }
121 }