[JAVA][Beginning Java 8 Games Development]

Chapter 13 ■ Animating Your Action Figure States: Setting the Image States Based on KeyEvent Processing
The InvinciBagel Run State: If KeyPressed Set imageState(1 & 2)
As you have seen in Chapter 8, I am going to try and achieve an animated run state for the character using only two
sprite cels, imageState(1) and imageState(2). This is about as optimized as you can get, both from an Image assets
standpoint, as well as from a coding standpoint, as you are about to see. This is especially true given that you can’t
animate anything such as a run cycle using a single image state. That said, we are going to create a lot of very realistic
animation during this chapter by using single cel, well-designed, sprite states, in combination with the sprite motion
code that we put into place in Chapter 12. The if(invinciBagel.isRight()) and if(invinciBagel.isLeft())
statement constructs will initially be quite easy and straightforward, but these will grow far more complex as we add
refining features during the course of this chapter. We will put the foundation into place for these first, then add the
up and down conditional if() statements, and then later, we will refine the right and left KeyEvent handling. Inside of
the if() constructs for the left and right arrow key (and A and D key movement), we will use the same chained method
call that we used in the first (impatiently waiting state) if() construct, only here we will call the imageStates(1) or
imageStates(2) sprite cels, from the List object, instead of using the imageStates(0) sprite cel. The Java code to
change the sprite Image states to state 1 or 2, if the right or left key is pressed (true), should look like the following:
if(invinciBagel.isRight()) {
spriteFrame.setImage(imageStates.get(1));
}
if(invinciBagel.isLeft()) {
spriteFrame.setImage(imageStates.get(2));
}
As you can see in Figure 13-3, the Java code is error-free, and we are ready to use the Run > Project work
process test this preliminary run mode. If you quickly press the left and right arrow keys in succession, you’ll see the
InvinciBagel running!
Figure 13-3. Add conditional if() statements that check for left/right movement, and sets the run sprite image states
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