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1 /*
2  * Copyright (c) 2009-2010 jMonkeyEngine
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met:
8  *
9  * * Redistributions of source code must retain the above copyright
10  *   notice, this list of conditions and the following disclaimer.
11  *
12  * * Redistributions in binary form must reproduce the above copyright
13  *   notice, this list of conditions and the following disclaimer in the
14  *   documentation and/or other materials provided with the distribution.
15  *
16  * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17  *   may be used to endorse or promote products derived from this software
18  *   without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 package jme3test.bullet;
34 
35 import com.jme3.app.Application;
36 import com.jme3.app.SimpleApplication;
37 import com.jme3.bullet.BulletAppState;
38 import com.jme3.bullet.PhysicsSpace;
39 import com.jme3.bullet.collision.shapes.BoxCollisionShape;
40 import com.jme3.bullet.collision.shapes.CollisionShape;
41 import com.jme3.bullet.control.GhostControl;
42 import com.jme3.bullet.control.RigidBodyControl;
43 import com.jme3.math.Vector3f;
44 import com.jme3.scene.Node;
45 import com.jme3.scene.shape.Box;
46 
47 /**
48  *
49  * @author tim8dev [at] gmail [dot com]
50  */
51 public class TestGhostObject extends SimpleApplication {
52 
53     private BulletAppState bulletAppState;
54     private GhostControl ghostControl;
55 
main(String[] args)56     public static void main(String[] args) {
57         Application app = new TestGhostObject();
58         app.start();
59     }
60 
61     @Override
simpleInitApp()62     public void simpleInitApp() {
63         bulletAppState = new BulletAppState();
64         stateManager.attach(bulletAppState);
65         bulletAppState.getPhysicsSpace().enableDebug(assetManager);
66 
67         // Mesh to be shared across several boxes.
68         Box boxGeom = new Box(Vector3f.ZERO, 1f, 1f, 1f);
69         // CollisionShape to be shared across several boxes.
70         CollisionShape shape = new BoxCollisionShape(new Vector3f(1, 1, 1));
71 
72         Node physicsBox = PhysicsTestHelper.createPhysicsTestNode(assetManager, shape, 1);
73         physicsBox.setName("box0");
74         physicsBox.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(.6f, 4, .5f));
75         rootNode.attachChild(physicsBox);
76         getPhysicsSpace().add(physicsBox);
77 
78         Node physicsBox1 = PhysicsTestHelper.createPhysicsTestNode(assetManager, shape, 1);
79         physicsBox1.setName("box1");
80         physicsBox1.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0, 40, 0));
81         rootNode.attachChild(physicsBox1);
82         getPhysicsSpace().add(physicsBox1);
83 
84         Node physicsBox2 = PhysicsTestHelper.createPhysicsTestNode(assetManager, new BoxCollisionShape(new Vector3f(1, 1, 1)), 1);
85         physicsBox2.setName("box0");
86         physicsBox2.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(.5f, 80, -.8f));
87         rootNode.attachChild(physicsBox2);
88         getPhysicsSpace().add(physicsBox2);
89 
90         // the floor, does not move (mass=0)
91         Node node = PhysicsTestHelper.createPhysicsTestNode(assetManager, new BoxCollisionShape(new Vector3f(100, 1, 100)), 0);
92         node.setName("floor");
93         node.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0f, -6, 0f));
94         rootNode.attachChild(node);
95         getPhysicsSpace().add(node);
96 
97         initGhostObject();
98     }
99 
getPhysicsSpace()100     private PhysicsSpace getPhysicsSpace(){
101         return bulletAppState.getPhysicsSpace();
102     }
103 
initGhostObject()104     private void initGhostObject() {
105         Vector3f halfExtents = new Vector3f(3, 4.2f, 1);
106         ghostControl = new GhostControl(new BoxCollisionShape(halfExtents));
107         Node node=new Node("Ghost Object");
108         node.addControl(ghostControl);
109         rootNode.attachChild(node);
110         getPhysicsSpace().add(ghostControl);
111     }
112 
113     @Override
simpleUpdate(float tpf)114     public void simpleUpdate(float tpf) {
115         fpsText.setText("Overlapping objects: " + ghostControl.getOverlappingObjects().toString());
116     }
117 }
118