jME3 Hello Collision - Error

Troubleshooting General Help
1

HI al,



If I try to run the jme3 hello collision tutorial I get following error:



[java]ava.lang.ClassCastException: com.jme3.scene.Geometry

at hellojme3.Main.simpleInitApp(Main.java:56)

at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:187)

at com.jme3.app.SimpleBulletApplication.initialize(SimpleBulletApplication.java:52)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:134)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:183)

at java.lang.Thread.run(Thread.java:613)[/java]



And I get the error in this part:



[java] assetManager.registerLocator(“Model/”, FileLocator.class.getName());

scene = assetManager.loadModel(“X.obj”);

scene.scale(0.1f, 0.1f, 0.1f);

rootNode.attachChild(scene);



DirectionalLight light = new DirectionalLight();

light.setDirection(new Vector3f(1, -1, -1));

light.setColor(ColorRGBA.White.clone());

rootNode.addLight(light);



bulletAppState = new BulletAppState();

stateManager.attach(bulletAppState);



CompoundCollisionShape sceneShape = CollisionShapeFactory.createMeshCompoundShape((Node) scene);

PhysicsNode landscape = new PhysicsNode(scene, sceneShape, 0);

[/java]





I don’t understand what’s the error?

2

you try to put something that is a Geometry into something that is not, at line 56 of your class.



what is line 56?

3

line 56:



CompoundCollisionShape sceneShape = CollisionShapeFactory.createMeshCompoundShape((Node) scene);

4

And the scene Object is a Geometry?

If so…you try to cast a geometry into a node…thus the error.



try to create a node object, attach the scene object to it , then attach the node to the rootNode and use it for your compound shape.

5

Why make it a node in the first place? A Geometry is fine…