[Dsol-java] Changing the background color in 3d animation

[R.T.H.Chin <r.t...@tb...>]

For everybody interested in 3D Animation in DSOL, here is a way to set 
the background (color) of the 3D Animation canves:

public class BackGround extends Renderable3D
{
    public BackGround(Location staticLocation, SimulatorInterface simulator)
    {
        super(staticLocation, simulator);
    }

    protected void provideModel(TransformGroup locationGroup)
    {
        Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f);
        Background bgNode = new Background(bgColor);
        BoundingSphere bounds = new BoundingSphere(new Point3d(0,0,0), 
1000.0);
        bgNode.setApplicationBounds(bounds);
        locationGroup.addChild(bgNode);

    }

    protected void update(Enumeration children)
    {
        // Do nothing
    }
}

And create it in constructModel:

public void constructModel(SimulatorInterface simulator)
            throws SimRuntimeException, RemoteException
    {
        new BackGround(new Location(0,0,0), simulator);
        // OTHER STUFF

    }