[JAVA][Beginning Java 8 Games Development]

Chapter 13 ■ Animating Your Action Figure States: Setting the Image States Based on KeyEvent Processing
note that we don’t absolutely have to use the Java this keyword; I am using it for clarity of meaning, and so you could
also simply utilize the method call without using dot notation, like this: setIsFlipH(false); if you like. The Java code
for doing this simple bookkeeping addition can be seen highlighted in Figure 13-18, and looks like this:
if(invinciBagel.isRight()) {
spriteFrame.setScaleX(1);
this.setIsFlipH(false);
} if(invinciBagel.isLeft()) {
spriteFrame.setScaleX(-1);
this.setIsFlipH(true);
}
// nested conditional if() processing ommitted for brevity
// nested conditional if() processing ommitted for brevity
Figure 13-18. Be sure to set the isFlipH property for the Bagel object using .setIsFlipH() called off of the this (object)
Next, let’s test all of the new sprite animation code to see if it does what we think that it logically should do! The
code is complex, at least for the primary left and right arrow key character movement, but is quite well organized, and
very logical, and I don’t see any problems with it from a logic standpoint, but testing it thoroughly using NetBeans is
the only way to find out! Let’s do that next. To review the sprite image states, refer back to Chapter 8 (Figure 8-2).
Testing the InvinciBagel Sprite Animation States: Run ➤ Project
Now it is time to use the NetBeans Run ➤ Project work process and test the .setImageState() method, which now gets
called after the .setXYLocation() and .setBoundaries() methods, but before the .moveInvinciBagel() method. So the
logical progression as it sits now is check keypressed, set X and Y location based on that, check to make sure you have
not gone past any boundaries, set the sprite animation (Image) state, and then position the sprite. As you can see in
Figure 13-19, the InvinciBagel character now runs realistically across the screen when you use left or right arrow keys.
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