GameState.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
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.input.InputManager;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.shape.Box;
import java.util.Random;

/**
 *

 */
public class GameState extends AbstractAppState {

    Spatial terrain;
    SimpleApplication app;
    InputManager inputManager;
    AssetManager assetManager;
    Node rootNode;
    BulletAppState appState;
    Geometry vehicle;
    RigidBodyControl vehiclePhysics;
    Random random = new Random();

    @Override
      public void initialize(AppStateManager stateManager, Application app) {
        super.initialize(stateManager, app);
        this.app = (SimpleApplication) app;
        this.inputManager = this.app.getInputManager();
        this.assetManager = this.app.getAssetManager();
        this.rootNode = this.app.getRootNode();
        this.app.getFlyByCamera().setMoveSpeed(100);

        appState = new BulletAppState();
        stateManager.attach(appState);

        createTerrain();
        createVehicle();
    }

      private void createTerrain() {
          terrain = assetManager.loadModel("Textures/GameScene.j3o");
          terrain.setLocalTranslation(0, 0, 0);

          RigidBodyControl terrainControl = new RigidBodyControl(0);
          terrain.addControl(terrainControl);
          appState.getPhysicsSpace().add(terrainControl);

          rootNode.attachChild(terrain);
      }

      private void createVehicle() {
          Box vehicleBox = new Box(10, 2, 10);
          vehicle = new Geometry("Vehicle", vehicleBox);
          Material vehicleMaterial = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
          vehicleMaterial.setColor("Color", ColorRGBA.Blue);
          vehicleMaterial.getAdditionalRenderState().setWireframe(true);
          vehicle.setMaterial(vehicleMaterial);
          vehicle.setLocalTranslation(0, 50, 0);

          vehiclePhysics = new RigidBodyControl(50);
          vehicle.addControl(vehiclePhysics);
          vehiclePhysics.setKinematic(true);
          appState.getPhysicsSpace().add(vehiclePhysics);
          appState.getPhysicsSpace().setGravity(new Vector3f(0, -15, 0));

          Box collisionBox = new Box(10, 2, 10);
          Geometry collisionGeo = new Geometry("CollisonBox", collisionBox);
          vehicle.setLocalTranslation(0, 50, 0);

          RigidBodyControl collisionControl = new RigidBodyControl(50);
          collisionGeo.addControl(collisionControl);
          appState.getPhysicsSpace().add(collisionControl);

          VehicleController vehicleController = new VehicleController(inputManager, vehicle, terrain, vehiclePhysics, appState);
          vehicle.addControl(vehicleController);
          appState.getPhysicsSpace().addCollisionListener(vehicleController);
          rootNode.attachChild(vehicle);
      }

      @Override
        public void update(float tpf) {

//            if (VehicleController.signal == 1) {
//                vehiclePhysics.applyImpulse(new Vector3f(random.nextInt(30), random.nextInt(30), random.nextInt(30)), Vector3f.ZERO);
//                vehiclePhysics.applyCentralForce(new Vector3f(random.nextInt(50),random.nextInt(50), random.nextInt(50) ));
//            }

    }
}