[JAVA][Beginning Java 8 Games Development]

Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine
Figure 17-11. Use Run ➤ Project to test the game, and collide with the objects on the screen, updating your scoreboard
Optimizing the scoringEngine() Method: Using Logical If Else If
Although the previous series of if() statements will do the job that we are trying to do here, we really need to emulate
the break; statement that we would have at our disposal if we were using the Java switch-case statement type. To
optimize this method, we want to break out of this evaluation series once the object type that is involved in the
collision has been determined. We can do this by attaching all of these conditional if() statements together, using the
Java else-if capability. If a condition in this structure is satisfied, the rest of the if-else-if structure is not evaluated,
which is the equivalent of a break; statement in a switch-case structure. To optimize this even further, you would
want to place the most common (the highest number of collidable objects in the Scene of that object type) objects at
the top of this if-else-if structure, and the least common objects at the bottom of the structure. All you have to do to
accomplish this is tie your if() condition blocks together by using the Java else keyword, as shown in Figure 17-12. This
creates a more compact and processing-optimized conditional evaluation structure, and uses fewer lines of Java code:
private void scoringEngine(Actor object) {
if(object instanceof Prop) {
invinciBagel.gameScore+=5;
invinciBagel.playiSound0();
} else if(object instanceof PropV) {
invinciBagel.gameScore+=4;
invinciBagel.playiSound1();
} else if(object instanceof PropH) {
invinciBagel.gameScore+=3;
invinciBagel.playiSound2();
} else if(object instanceof PropB) {
invinciBagel.gameScore+=2;
invinciBagel.playiSound3(); }
invinciBagel.scoreText.setText(String.valueOf(invinciBagel.gameScore));
}
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