[JAVA][Beginning Java 8 Games Development]

Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine
Figure 17-40. Modify the Enemy() constructor method in the Enemy class to add an InvinciBagel object named iBagel
Now that the Enemy class (object) can see into the InvinciBagel class (object), we’re ready to add projectiles.
Creating a Projectile Infrastructure: Adding Projectile Variables
To add projectile support to the Enemy class we will need to declare four new variables at the top of the class. These
will include randomLocation, a new variable that we’ll use for both the Enemy character and the projectile he shoots;
randomOffset, a new variable that will hold the vertical (Y) offset that allows us to fine-tune position the projectile so
that it comes out of the bazooka barrel; and the bulletRange and bulletOffset allowing us to do X positioning. We will
set the randomLocation variable equal to the randomNum.nextInt(attackBoundary) logic, which used to be inside
of the .setTranslateY() method call, and add 5 to this variable, to create the randomOffset variable data value.
The new Java structure for these methods is error-free, as shown in Figure 17-41, and should look like the following
Java code:
int spriteMoveR, spriteMoveL, destination;
int randomLocation, randomOffset, bulletRange, bulletOffset;
public void update() {
if(callAttack) {
if(attackCounter >= attackFrequency) {
attackCounter=0;
spriteMoveR = 700;
spriteMoveL = -70;
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