BranchGroup theScene = new BranchGroup();
//Add the helicopter and the tree to the scene.
theScene.addChild(tgHeliPlat);
theScene.addChild(tgTree);
//The following four lines generate a white background.
Background bg = new Background(new Color3f(1.0f,1.0f,1.0f));
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),Double.MAX_VALUE);