[JAVA][Beginning Java 8 Games Development]

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Chapter 14 ■ Setting Up the Game Environment: Creating Fixed Sprite Classes Using the Actor Superclass Figure 14-11. Add a Java this keyword reference to PropH (object) inside of the constructor and open up method helper Double-click on the .setIsFlipH method, shown highlighted in Figure 14-11, and insert a true value inside the method call parameter area. The finished this.setIsFlipH(true); Java statement can be seen in Figure 14-12. Figure 14-12. Call the .setIsFlipH() method, off of a Java this (PropH) object reference, and pass it the true setting value 306 www.it-ebooks.info
Chapter 14 ■ Setting Up the Game Environment: Creating Fixed Sprite Classes Using the Actor Superclass It is important to note that if we only use the this.setFlipH(true); method invocation in the constructor method, we would still need to observe that isFlipH is set this way, and invoke your .spriteFrame.setScaleX(-1); method call, somewhere else in the code. Let’s go ahead and put this method call in your constructor method as well, so that all our PropH objects automatically will have their Image assets flipped around the Y axis. In case you might be wondering why the .setScaleX(-1) method mirrors the Image asset around the Y axis, that is something that I was also wondering about, but what I did was match the isFlipH with the .setScaleX(-1) (since X is an H or horizontal axis). That said, I would have made .setScaleY(-1) mirror around the vertical Y axis, which makes more sense to me. Add another line of code and type spriteFrame and hit the period key, and select .setScaleX in the pop-up, as seen in Figure 14-13. Figure 14-13. Call a .setScaleX() method, off of the spriteFrame object variable reference, and pass it a -1 setting value Double-click on the setScaleX(double value) void option in the pop-up method selector and then add the -1 value, completing the method call. Now all PropH objects will automatically have the Image asset Y axis mirrored! The final code for the PropH constructor, once you add in the .setTranslateX() and .setTranslateY() method calls that will actually position the fixed sprite location on the Stage, is seen in Figure 14-14, and looks like the following Java code: import javafxscene.image.Image; public class PropH extends Actor { public PropH(String SVGdata, double xLocation, double yLocation, Image... spriteCels) { super(SVGdata, xLocation, yLocation, spriteCels); this.setIsFlipH(true); spriteFrame.setScaleX(-1); spriteFrame.setTranslateX(xLocation); spriteFrame.setTranslateY(yLocation); } } www.it-ebooks.info 307
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Contents at a Glance About the Auth
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Introduction The Java Programming L
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■ Introduction In Chapter 13 you
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Chapter 1 ■ Setting Up a Java 8 G
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Chapter 2 Setting Up Your Java 8 ID
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Chapter 2 ■ Setting Up Your Java
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Profiling Your Java 8 Game Applicat
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Chapter 3 ■ A Java 8 Primer: An I
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Chapter 4 ■ An Introduction to Ja
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Chapter 5 An Introduction to Game D
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Chapter 5 ■ An Introduction to Ga
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Chapter 6 The Foundation of Game De
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Chapter 6 ■ The Foundation of Gam
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Chapter 7 The Foundation of Game Pl
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Chapter 8 Creating Your Actor Engin
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Chapter 8 ■ Creating Your Actor E
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Chapter 9 Controlling Your Action F
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Chapter 9 ■ Controlling Your Acti
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Chapter 10 Directing the Cast of Ac
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Chapter 10 ■ Directing the Cast o
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Chapter 11 ■ Moving Your Action F
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Chapter 12 Setting Boundaries for Y
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Chapter 12 ■ Setting Boundaries f
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Chapter 16 ■ Collision Detection:
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Chapter 17 Enhancing Game Play: Cre
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Chapter 17 ■ Enhancing Game Play:
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■ index Background image (cont.)
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■ index InvinciBagel animation (c
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■ index Modifier keywords access
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Beginning Java 8 Games Development
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This Java 8 Game Development book i
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■ Contents NetBeans 8.0 Is User I
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■ Contents ■■Chapter 5: An In
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■ Contents Creating a Hero Superc
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■ Contents Organizing the .update
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■ Contents Optimizing the Scene G
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About the Author Wallace Jackson ha
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Acknowledgments I would like to ack
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