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  * Handles 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(fa,fb,ba,bb,(Entity) cbA,(Entity) cbB);
40 
41         if (cbA != null) {
42             // fa is sensor but not fb
43             if (fa.isSensor() && cbB != null && !fb.isSensor()) {
44                 cbB.EnterTrigger(info);
45             } else {
46                 cbA.BeginContact(info);
47             }
48         }
49 
50         if (cbB != null) {
51             if (fb.isSensor() && cbA != null && !fa.isSensor()) {
52                 cbA.EnterTrigger(info);
53             } else {
54                 cbB.BeginContact(info);
55             }
56         }
57     }
58 
59     /**
60      * called for every contact that box2d detects after collision restitution (doesn't matter if it is a trigger/sensor)
61      *
62      * @param contact the contact data
63      */
64     @Override
65     public void endContact(Contact contact) {
66         // generally calls the correct callback on the appropriate objects (not as intuitive as id like though)
67         Fixture fa = contact.getFixtureA();
68         Body ba = fa.getBody();
69         Object oa = ba.getUserData();
70         CollisionCallBack cbA = (CollisionCallBack) oa;
71 
72         Fixture fb = contact.getFixtureB();
73         Body bb = fb.getBody();
74         Object ob = bb.getUserData();
75         CollisionCallBack cbB = (CollisionCallBack) ob;
76 
77         final CollisionInfo info = new CollisionInfo(fa,fb,ba,bb,(Entity) cbA,(Entity) cbB);
78 
79         if (cbA != null) {
80             if (fa.isSensor() && cbB != null && !fb.isSensor()) {
81                 cbB.ExitTrigger(info);
82             } else {
83                 cbA.EndContact(info);
84             }
85         }
86 
87         if (cbB != null) {
88             if (fb.isSensor() && cbA != null && !fa.isSensor()) {
89                 cbA.ExitTrigger(info);
90             } else {
91                 cbB.EndContact(info);
92             }
93         }
94     }
95 
96     @Override
97     public void preSolve(Contact contact, Manifold oldManifold) {
98 
99     }
100 
101     @Override
102     public void postSolve(Contact contact, ContactImpulse impulse) {
103 
104     }
105 }