[JAVA][Beginning Java 8 Games Development]

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Chapter 16 ■ Collision Detection: Creating SVG Polygons for the Game Actors and Writing Code to Detect Collision Figure 16-37. Remove the private access control modifier keyword from in front of the StackPane root; Java statement Once you make this modification, you will see the wavy red error highlighting in your current programming statement in the Bagel.java disappear, as shown in Figure 16-38, and all we have to worry about now is removing the warning highlighting that pertains to passing an Actor object to be removed from the Scene Graph rather than a Node object (a spriteFrame ImageView) that it is expecting. This is because the JavaFX Scene Graph manages Node classes, as well as Node subclasses such as ImageView, and does not accept non-Node-subclasses, such as the Actor class that we designed in Chapter 8, and have implemented during subsequent chapters. Our Actor class (object) does contain a Node object, an ImageView Node subclass, inside of it, so we have to include a reference to this object, using Java dot notation, so the .remove() method can effectively look “inside” of our Actor object to reach (access) this Node object. 382 www.it-ebooks.info
Chapter 16 ■ Collision Detection: Creating SVG Polygons for the Game Actors and Writing Code to Detect Collision Figure 16-38. Add a period after object in the .remove() method to open method helper and select .getSpriteFrame() Place your cursor after the object reference that is inside of the .remove() method call that we are working on implementing, and type a period. This will bring up the attribute (property) and method helper pop-up, shown in Figure 16-38. Double-click on the getSpriteFrame() method, which we created back in Chapter 8, to call it off of the current Actor object which has been passed into the .collide() method. This will pass an ImageView Node object over inside of the .remove() method call, as expected, and the warning highlighting will also disappear, leaving clean code. As you can see in Figure 16-39, all of your Java code is error-free, and you have now played a sound, added this Actor object to the HashSet REMOVED_ACTORS data set, and removed the spriteFrame ImageView Node object for this Actor from the JavaFX Scene Graph root (currently a StackPane layout container). We are now ready to remove this Actor object from the CURRENT_CAST List object, by using a .resetRemovedActors() method call. www.it-ebooks.info 383
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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 13 ■ Animating Your Actio
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Chapter 14 ■ Setting Up the Game
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Chapter 15 Implementing Game Audio
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Chapter 15 ■ Implementing Game Au
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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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