[JAVA][Beginning Java 8 Games Development]

Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine
Powering the Enemy .update( ) Method: Using the GamePlayLoop .handle( ) Method
Before we can start to test the code inside the Enemy.java class .update() method, we must “wire it up” to the
.handle() method in the GamePlayLoop.java class. As you know, this method is our doorway into the JavaFX
pulse timing event processing engine that drives our game at a lightning fast 60 FPS. Now our GamePlayLoop
.handle() method will be updating both an iBagel InvinciBagel character as well as the iBeagle Enemy auto-attack
programming logic. It is easy to see why InvinciBagel and InvinciBeagle are enemies; it’s an identity crisis of sorts,
kind of like one of those misspelled domain name disputes! Your Java code, seen error-free in Figure 17-34, will look
like the following:
@Override
public void handle(long now) {
invinciBagel.iBagel.update();
invinciBagel.iBeagel.update();
}
Figure 17-34. Add a call to the invinciBagel.iBeagle.update() method inside of the GamePlayLoop .handle() method
Use the Run ➤ Project work process to test your first round (level) of Enemy auto-attack Java code. As you can
see in Figure 17-35, the InvinciBeagle appears on both sides of the screen, in random locations along the Y axis, and
alternates between the left side of the screen and the right side of the screen. I left the Bullet and Cream Cheese
Ball Projectile Actor objects visible on the screen for now, in the upper-left corner. We will eventually place these
off-screen, and will shoot them at the InvinciBagel every few seconds using the InvinciBeagle’s powerful bazooka.
www.it-ebooks.info
423