[JAVA][Beginning Java 8 Games Development]

Chapter 16 ■ Collision Detection: Creating SVG Polygons for the Game Actors and Writing Code to Detect Collision
}
@Override
public boolean collide(Actor object) {
if (invinciBagel.iBagel.spriteFrame.getBoundsInParent().intersects(
object.getSpriteFrame().getBoundsInParent() ) ) {
Shape intersection =
SVGPath.intersect(invinciBagel.iBagel.getSpriteBound(), object.getSpriteBound());
if (intersection.getBoundsInLocal().getWidth() != -1) {
return true;
}
}
return false;
}
Figure 16-41. Optimizing the interaction between the collide() method and the checkCollision() method
Use the Run ➤ Project work process to make sure the code works as it did before the method optimizations.
Optimizing the Scene Graph: Using the Group Class
Since we’re not really using the StackPane for image layer compositing or UI design, other than the splashscreen use,
let’s add another optimization, and use a Group class (object) for our game, since it is further up the class hierarchy,
and closer to the Node superclass than the more specialized StackPane class (object) is. Rather than using a class that
uses the more complex Object ➤ Node ➤ Parent ➤ Region ➤ Pane ➤ StackPane hierarchy, we will use the much
shorter and simpler Object ➤ Node ➤ Parent ➤ Group hierarchy. The significance of this optimization is that using a
Group root Node uses a lot less code (properties and methods) in system memory. Since we are not specifically using
any of the highly specialized StackPane properties or methods, we can perform a major optimization by using a Group
class. A Group object (class) uses fixed object positioning, so we will have to redo the code for our HBox and Actor
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