Attaching Indicators (Healthbars) to rootNode/SceneGraph

User Code & Projects tonegodgui
39

So I created a test case and could track it down. Before opening a thread could you maybe confirm whether it’s broken or just misuse?

b.setAlignment(BillboardControl.Alignment.Screen); // This works fully
b.setAlignment(BillboardControl.Alignment.AxialZ); // Couldn't check, does wierd things :P 
b.setAlignment(BillboardControl.Alignment.AxialY); // This is the one I am using, leads to trouble
b.setAlignment(BillboardControl.Alignment.Camera); // This is like without BillBoard (and I used the flyCam here)

Note: They all work when applied to the parent axis (where they basically override the actual rotation) but not as a child axis.

package mygame;

import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.FastMath;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.control.BillboardControl;
import com.jme3.scene.shape.Quad;

public class Main extends SimpleApplication {

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

    @Override
    public void simpleInitApp()
    {
        n = new Node("myNode");
        Node o = new Node("subNode");
        
        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        mat.setColor("Color", ColorRGBA.Blue);
        
        Quad q = new Quad(1f, 1f);
        Geometry geom = new Geometry("Box", q);
        geom.setMaterial(mat);
        
        o.attachChild(geom);
        BillboardControl b = new BillboardControl();
        b.setAlignment(BillboardControl.Alignment.AxialY);
        o.addControl(b);
        
        n.attachChild(o);
        n.rotate(0f, FastMath.HALF_PI, 0f);
        
        rootNode.attachChild(n);        
        flyCam.setMoveSpeed(flyCam.getMoveSpeed() * 5f);
    }

    @Override
    public void simpleUpdate(float tpf)
    {
        n.rotate(0f, FastMath.HALF_PI * tpf, 0f);
    }
}

Edit: Checked the Code that comes with my 3.0 SDK:

In rotateScreenAligned (the one that works), there is:

if ( parent != null ) {
        rot =  parent.getWorldRotation().inverse().multLocal(rot);
        rot.normalizeLocal();
    }

This however is missing in rotateCameraAligned and rotateAxial. I will try to fix it and see if i can do it with my humble Quaternion skills :stuck_out_tongue:

Edit2: Adding that did partially work (Screen and Camera work, Axial only works if you DONT rotate the spatial (but you can move the camera))