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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 
     56     public static void main(String[] args) {
     57         Application app = new TestGhostObject();
     58         app.start();
     59     }
     60 
     61     @Override
     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 
    100     private PhysicsSpace getPhysicsSpace(){
    101         return bulletAppState.getPhysicsSpace();
    102     }
    103 
    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
    114     public void simpleUpdate(float tpf) {
    115         fpsText.setText("Overlapping objects: " + ghostControl.getOverlappingObjects().toString());
    116     }
    117 }
    118