GameState.java

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package mygame.controls_states;

import com.jme3.app.Application;
import com.jme3.app.SimpleApplication;
import com.jme3.app.state.AbstractAppState;
import com.jme3.app.state.AppStateManager;
import com.jme3.asset.AssetManager;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.renderer.Camera;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.shape.Box;

/**
 *

 */
public class GameState extends AbstractAppState{

    static  Geometry vehicle;
    static RigidBodyControl vehicleControler;
    BulletAppState appState = new BulletAppState();
    Node rootNode;
    SimpleApplication app;
    AssetManager assetManager;
    Camera camera;

      @Override
      public void initialize(AppStateManager stateManager, Application app) {
        super.initialize(stateManager, app);

        this.assetManager = app.getAssetManager();
        this.app = (SimpleApplication) app;
        this.rootNode = this.app.getRootNode();
        this.camera = app.getCamera();

        this.app.getFlyByCamera().setMoveSpeed(100);

       createTerrain();
       createVehicle();

    }

    private void createTerrain() {

        Spatial terrain = assetManager.loadModel("Textures/GameScene.j3o");
        terrain.setLocalTranslation(0, -100, 0);
        rootNode.attachChild(terrain);


         appState = new BulletAppState();
        app.getStateManager().attach(appState);

        RigidBodyControl terrainPhysics = new RigidBodyControl(0);
        terrain.addControl(terrainPhysics);

      //  appState.getPhysicsSpace().setGravity(new Vector3f(0, -0.25f, 0));

        appState.getPhysicsSpace().add(terrainPhysics);

    }

    private void createVehicle() {
        Box box = new Box(2, 2, 2);

        Material material = new Material(assetManager,
          "Common/MatDefs/Misc/Unshaded.j3md");
         vehicle = new Geometry("Vechicle", box);
        material.setColor("Color", ColorRGBA.Blue);
       // material.getAdditionalRenderState().setWireframe(true);

        vehicleControler = new RigidBodyControl(2);
        vehicle.addControl(vehicleControler);
        appState.getPhysicsSpace().add(vehicleControler);
        appState.getPhysicsSpace().setGravity(new Vector3f(0, -9.8f, 0));
        vehicleControler.setFriction(0);
       // vehicleControler.setKinematic(true);
        vehicle.setMaterial(material);
        vehicle.setLocalTranslation(0, -90, 0);
        vehicle.setCullHint(Spatial.CullHint.Never);
      //  this.app.getFlyByCamera().
        rootNode.attachChild(vehicle);


        VehicleControl vehicleControl = new VehicleControl(this.app.getInputManager());
        vehicle.addControl(vehicleControl);




        }

    public static RigidBodyControl getVehicleController() {
        return vehicleControler;
    }


     @Override
    public void update(float tpf) {
        //  getVehicleController().applyCentralForce(new Vector3f(0, 20, 0));


    }

}