1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
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31 */
32
33package jme3test.bullet;
34
35
36import com.jme3.app.SimpleApplication;
37import com.jme3.bullet.BulletAppState;
38import com.jme3.bullet.PhysicsSpace;
39import com.jme3.bullet.collision.shapes.*;
40import com.jme3.bullet.control.RigidBodyControl;
41import com.jme3.bullet.joints.HingeJoint;
42import com.jme3.export.binary.BinaryExporter;
43import com.jme3.export.binary.BinaryImporter;
44import com.jme3.math.Plane;
45import com.jme3.math.Vector3f;
46import com.jme3.renderer.RenderManager;
47import com.jme3.scene.Node;
48import com.jme3.scene.shape.Sphere;
49import java.io.ByteArrayInputStream;
50import java.io.ByteArrayOutputStream;
51import java.io.IOException;
52import java.util.logging.Level;
53import java.util.logging.Logger;
54
55/**
56 * This is a basic Test of jbullet-jme functions
57 *
58 * @author normenhansen
59 */
60public class TestPhysicsReadWrite extends SimpleApplication{
61    private BulletAppState bulletAppState;
62    private Node physicsRootNode;
63    public static void main(String[] args){
64        TestPhysicsReadWrite app = new TestPhysicsReadWrite();
65        app.start();
66    }
67
68    @Override
69    public void simpleInitApp() {
70        bulletAppState = new BulletAppState();
71        stateManager.attach(bulletAppState);
72        bulletAppState.getPhysicsSpace().enableDebug(assetManager);
73        physicsRootNode=new Node("PhysicsRootNode");
74        rootNode.attachChild(physicsRootNode);
75
76        // Add a physics sphere to the world
77        Node physicsSphere = PhysicsTestHelper.createPhysicsTestNode(assetManager, new SphereCollisionShape(1), 1);
78        physicsSphere.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(3, 6, 0));
79        rootNode.attachChild(physicsSphere);
80        getPhysicsSpace().add(physicsSphere);
81
82        // Add a physics sphere to the world using the collision shape from sphere one
83        Node physicsSphere2 = PhysicsTestHelper.createPhysicsTestNode(assetManager, physicsSphere.getControl(RigidBodyControl.class).getCollisionShape(), 1);
84        physicsSphere2.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(4, 8, 0));
85        rootNode.attachChild(physicsSphere2);
86        getPhysicsSpace().add(physicsSphere2);
87
88        // Add a physics box to the world
89        Node physicsBox = PhysicsTestHelper.createPhysicsTestNode(assetManager, new BoxCollisionShape(new Vector3f(1, 1, 1)), 1);
90        physicsBox.getControl(RigidBodyControl.class).setFriction(0.1f);
91        physicsBox.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(.6f, 4, .5f));
92        rootNode.attachChild(physicsBox);
93        getPhysicsSpace().add(physicsBox);
94
95        // Add a physics cylinder to the world
96        Node physicsCylinder = PhysicsTestHelper.createPhysicsTestNode(assetManager, new CylinderCollisionShape(new Vector3f(1f, 1f, 1.5f)), 1);
97        physicsCylinder.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(2, 2, 0));
98        rootNode.attachChild(physicsCylinder);
99        getPhysicsSpace().add(physicsCylinder);
100
101        // an obstacle mesh, does not move (mass=0)
102        Node node2 = PhysicsTestHelper.createPhysicsTestNode(assetManager, new MeshCollisionShape(new Sphere(16, 16, 1.2f)), 0);
103        node2.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(2.5f, -4, 0f));
104        rootNode.attachChild(node2);
105        getPhysicsSpace().add(node2);
106
107        // the floor mesh, does not move (mass=0)
108        Node node3 = PhysicsTestHelper.createPhysicsTestNode(assetManager, new PlaneCollisionShape(new Plane(new Vector3f(0, 1, 0), 0)), 0);
109        node3.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0f, -6, 0f));
110        rootNode.attachChild(node3);
111        getPhysicsSpace().add(node3);
112
113        // Join the physics objects with a Point2Point joint
114        HingeJoint joint=new HingeJoint(physicsSphere.getControl(RigidBodyControl.class), physicsBox.getControl(RigidBodyControl.class), new Vector3f(-2,0,0), new Vector3f(2,0,0), Vector3f.UNIT_Z,Vector3f.UNIT_Z);
115        getPhysicsSpace().add(joint);
116
117        //save and load the physicsRootNode
118        try {
119            //remove all physics objects from physics space
120            getPhysicsSpace().removeAll(physicsRootNode);
121            physicsRootNode.removeFromParent();
122            //export to byte array
123            ByteArrayOutputStream bout=new ByteArrayOutputStream();
124            BinaryExporter.getInstance().save(physicsRootNode, bout);
125            //import from byte array
126            ByteArrayInputStream bin=new ByteArrayInputStream(bout.toByteArray());
127            BinaryImporter imp=BinaryImporter.getInstance();
128            imp.setAssetManager(assetManager);
129            Node newPhysicsRootNode=(Node)imp.load(bin);
130            //add all physics objects to physics space
131            getPhysicsSpace().addAll(newPhysicsRootNode);
132            rootNode.attachChild(newPhysicsRootNode);
133        } catch (IOException ex) {
134            Logger.getLogger(TestPhysicsReadWrite.class.getName()).log(Level.SEVERE, null, ex);
135        }
136
137    }
138
139    private PhysicsSpace getPhysicsSpace(){
140        return bulletAppState.getPhysicsSpace();
141    }
142
143    @Override
144    public void simpleUpdate(float tpf) {
145        //TODO: add update code
146    }
147
148    @Override
149    public void simpleRender(RenderManager rm) {
150        //TODO: add render code
151    }
152
153}
154