[JAVA][Beginning Java 8 Games Development]

Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine
Be sure not to call a invinciBagel.scoreText.setText(String.valueOf(invinciBagel.gameScore));
statement, which updates the scoreText UI element using a .setText() method, inside of each of these conditional if()
statements. Instead, notice that I am placing it at the end of the method, after all of these evaluations are completed.
I am doing this so I only have to call this one line of code one time, at the end of the conditional if() object processing
structure. That said, the Java code will still work if you place this scoreText object score update statement inside each
of the conditional if() statement code body structures. However, I’m trying to show you how to write code that does a
lot of work by using relative few (a dozen or less) lines of code to accomplish major Java 8 game development tasks.
Next, we are going to take the .playiSound0() method call out of the .checkCollision() method, and we’ll put it
inside of the scoringEngine() method instead. As long as it is in one of these two methods, it’s going to get called on
collision, one way or the other. The reason that I am going to do it this way is because we will probably want to play a
different sound effect when a player finds a treasure, or is hit by a projectile. In this way, your audio is associated with
scoring and game play when different types of collisions are detected, rather than just playing audio for any collision.
Our conditional if() structure code bodies use curly braces, which allows us to add Java statements into each type
of collision (scoring) object instance (type). So in addition to incrementing (or decrementing, as we will add later) the
score, we can also use different sounds (audioClips) for different objects. Let’s add the .playSound() method calls into
these conditional if() code blocks next, so that we have the code in place to trigger sound effects when a treasure is
picked up by the primary character or when he is hit by (or catches) a projectile shot by an enemy (an InvinciBeagle)
character, or when he collides with a prop in the scene.
This is done by using the following Java conditional if() structures, which can also be seen in Figure 17-10:
private void scoringEngine(Actor object) {
if(object instanceof Prop) {
invinciBagel.gameScore+=5;
invinciBagel.playiSound0();
}
if(object instanceof PropV) {
invinciBagel.gameScore+=4;
invinciBagel.playiSound1();
}
if(object instanceof PropH) {
invinciBagel.gameScore+=3;
invinciBagel.playiSound2();
}
if(object instanceof PropB) {
invinciBagel.gameScore+=2;
invinciBagel.playiSound3();
}
invinciBagel.scoreText.setText(String.valueOf(invinciBagel.gameScore));
}
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