I can't shoot the ball

Troubleshooting SDK
1

I’m doind a game based in Arkanoid but in 3D. This is the code:

[java]/*

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  • and open the template in the editor.
    */
    package balltingo;

import com.jme3.app.SimpleApplication;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.collision.shapes.CapsuleCollisionShape;
import com.jme3.bullet.collision.shapes.CollisionShape;
import com.jme3.bullet.control.BetterCharacterControl;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.bullet.util.CollisionShapeFactory;
import com.jme3.input.controls.ActionListener;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.scene.Spatial;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.scene.Node;

/**
*

  • @author dominuskernel
    */
    public class StageOne extends SimpleApplication{
    private Spatial scene, barra, ball;
    private BulletAppState bulletAppState;
    private RigidBodyControl landscape, barra_phy, ball_phy;
    private boolean left = false, right = false, shoot = false, empezar = false;

    public static void main(String[] args){
    StageOne app = new StageOne();
    app.start();
    }

    @Override
    public void simpleInitApp(){
    //the camera doesn’t move
    flyCam.setEnabled(false);
    //flyCam.setMoveSpeed(50);

     //call the class for collisions
 bulletAppState = new BulletAppState();
 stateManager.attach(bulletAppState);
 
 //set camera location
 cam.setLocation(new Vector3f(-22f, 31f, 0f));
 
 //the camera look at direction
 cam.lookAt(new Vector3f(0f, 3f, 0f), Vector3f.UNIT_Y);
 
 //Declare scene and model and set location for barra
 scene = assetManager.loadModel("Scenes/stage1/balltingo.j3o");
 barra = assetManager.loadModel("Models/barra/barra.j3o");
 barra.setLocalTranslation(-22f, 6.5f, 0f);
 barra.setLocalScale(2f);
 ball = assetManager.loadModel("Models/bola/ball.j3o");
 
 ball.setLocalTranslation(-12.5f, 6.7f, 0f);
 ball.setLocalScale(0.5f);
 
 //set the collision scene and barra model
 CollisionShape sceneShape = 
         CollisionShapeFactory.createMeshShape((Node)scene);
 landscape = new RigidBodyControl(sceneShape,0);
 scene.addControl(landscape);
 
 barra_phy = new RigidBodyControl(0.0f);
 barra_phy.setKinematicSpatial(true);
 barra.addControl(barra_phy);
 bulletAppState.getPhysicsSpace().add(barra);
 
 ball_phy = new RigidBodyControl(0.0f);
 ball.addControl(ball_phy);
 bulletAppState.getPhysicsSpace().add(ball);
 
 //attach scene
 rootNode.attachChild(scene);
 rootNode.attachChild(barra);
 rootNode.attachChild(ball);
 
 //call to setUpKeys method
 setUpKeys();

    }

    //set the controls key for barra
    public void setUpKeys(){
    inputManager.addMapping(“Left”, new KeyTrigger(KeyInput.KEY_A));
    inputManager.addMapping(“Right”, new KeyTrigger(KeyInput.KEY_D));
    inputManager.addMapping(“Shoot”, new KeyTrigger(KeyInput.KEY_SPACE));
    inputManager.addListener(actionListener,“Left”,“Right”,“Shoot”);
    }

    private ActionListener actionListener = new ActionListener() {
    public void onAction(String binding, boolean keyPressed, float tpf) {
    if(binding.equals(“Left”)){
    left = keyPressed;
    } else if(binding.equals(“Right”)){
    right = keyPressed;
    } else if(binding.equals(“Shoot”)){
    shoot = keyPressed;
    empezar = true;
    }
    }
    };

    //set the actions
    public void simpleUpdate(float tpf){
    if(left && barra.getLocalTranslation().z >= -13){
    barra.move(0,0,-20tpf);
    if(empezar==false){
    ball.move(0,0,-20    tpf);
    }
    }
    if(right && barra.getLocalTranslation().z <= 13){
    barra.move(0,0,20tpf);
    if(empezar==false){
    ball.move(0,0,20    tpf);
    }
    }
    if(shoot){
    ball_phy.applyTorqueImpulse(new Vector3f(0, 5*tpf, 0));
    ball_phy.setLinearVelocity(new Vector3f(0f,2f,0f).mult(25));
    }

    }
    }[/java]

The problem is that I can’t shoot the ball. I read the documentation but I didn’t understand very well how move the physics objects.

2

There may be other problems, but one of them is that your ball has no mass.