jMonkeyEngine.org

I’ve two classes(Items and HelloTerrainCollision). The Items class loads models and provides methods to access them.
In my items class I save my objects in a Node called “P_items”.

If I press “e” (Action) it will print out : P_Items [teapot (Geometry)]
Showing that the Node has teapot attached.
As soon as I place the teapot in the scene (‘p’) and press ‘e’ again i get: P_Items []
I can’t see how I’ve remove the spatial from my node by just placing it in the scene?
Here’s everything: http://www.2shared.com/file/osxjO25P/Game.html (2.5MB)

I’m using Windows 7 version 6.1 running on amd64; Cp1252; en_US

/*
 * This class tracks the items(pickable) in the world.
 * -keeps information about objects/items
 * --Location,name and other stuff
 */
package mygame;

import com.bulletphysics.collision.shapes.CollisionShape;
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.bullet.util.CollisionShapeFactory;
import com.jme3.material.Material;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import java.util.ArrayList;

public class Items{
    static int size     = 0;
    static ArrayList <Spatial> objects = new <Spatial>ArrayList();
    static Node P_items        = new Node("pickables");
    public Items(AssetManager assetManager,AppStateManager stateManager)
    {
        //teapot
        Spatial teapot = assetManager.loadModel("Models/tea/tea.j3o");
        teapot.setName("teapot");
        Material teapot_mat= new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        teapot.setMaterial(teapot_mat);
        objects.add(teapot);
        P_items.attachChild(teapot);
        System.out.println("P_items.getChildren() : " + P_items.getChildren());
    }

    public Spatial getItem(String name)
    {
        for(int i = 0;i<objects.size();i++)
        {
            if (objects.get(i).getName().equals(name)){
            return objects.get(i);
            }
        }
        //If Notting has been found
        return null;
    }
    public int getSize()
    {
        return size;
    }
    public Node getNItems()
    {
        return P_items;
    }
}

Code in HelloTerrainCollision that deals with Items

else if(binding.equals("Action") && !value) {
        CollisionResults results = new CollisionResults();
        Ray ray = new Ray(cam.getLocation(), cam.getDirection());
        P_Items.getNItems().collideWith(ray, results);

        System.out.println("P_Items " + P_Items.getNItems().getChildren());
        for (int i = 0; i < results.size(); i++) {
          System.out.println("* Collision #" + i);
        }
      }else if(binding.equals("PlaceItem") && !value)
      {
        CollisionResults results = new CollisionResults();
        Ray ray = new Ray(cam.getLocation(), cam.getDirection());

       Spatial teapot = P_Items.getItem("teapot");
       terrain.collideWith(ray, results);
       if (results.size() > 0)
       {
        System.out.println("Results size for place item:" + results.size());
        System.out.println("results.getCollision(0).getContactPoint():" + results.getCollision(0).getContactPoint());

        teapot.setLocalTranslation(results.getCollision(0).getContactPoint().getX(),results.getCollision(0).getContactPoint().getY(),results.getCollision(0).getContactPoint().getZ());

        rootNode.attachChild(teapot);
       }
      }

Thanks for any help you can give

Ah, now it makes sense. Thank you.