[JAVA][Beginning Java 8 Games Development]

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Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine Figure 17-45. Add a launchIt flag to the if(onScreen) condition to make that code structure wait for the pauseCounter For the if(takeSides) version of this if(onScreen && launchIt) structure, make sure to change the destination to -70, make the counter if(spriteMoveL >= destination) and the counter update spriteMoveL-=1; and the takeSides equal to false in the else portion of this conditional structure. Next, let’s update our scoring engine in the Bagel class. Update the .scoringEngine( ) Method: Using .equals( ) Let’s use a different approach for these last three object scoring else-if structures, and instead of using an if(object instanceof Actor) for more general object type comparisons, we will use the more precise .equals() method that allows us to specify the object itself, such as if(object.equals(invinciBagel.iBullet). You can see the complete if-else structure in Figure 17-46, and the <strong>Java</strong> code for the last three Enemy objects looks like the following: } else if(object.equals(invinciBagel.iBullet)) { invinciBagel.gameScore-=5; invinciBagel.playiSound5; www.it-ebooks.info 437
Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine } else if(object.equals(invinciBagel.iCheese)) { invinciBagel.gameScore+=5; invinciBagel.playiSound0; } else if(object.equals(invinciBagel.iBeagle)) { invinciBagel.gameScore+=10; invinciBagel.playiSound0; } Figure 17-46. Adding the iBullet, iCheese and iBeagle object.equals() if-else structures to the .scoringEngine() method At this point, if you use a Run ➤ Project work process, you should have an iBeagle shooting a Bullet or Cream Cheese Ball. When you catch the iBeagle with the InvinciBagel character, you should score ten points, or, if you catch a Cream Cheese Ball, you should get five points. If you get hit by a Bullet, you should lose five points. You will notice as you test the InvinciBagel game application that once you get hit by a Bullet, Cream Cheese Ball, or when you catch the iBeagle, that they do not come back! This is because the collision detection programming logic removes an object from the game once an InvinciBagel collects it (Treasure) or collides with it (Prop or Projectile). So the next step in our development will be to add in the programming logic that adds an iBullet, iCheese or iBeagle object back into the castDirector object once they have been removed by the collision detection programming logic that you put into place in Chapter 16. To do this, we’ll have to code an enhancement to the CastingDirector.java class, code the new .loadEnemy(), .loadBullet() and .loadCheese() methods at the bottom of the Enemy.java class, and add the appropriate programming logic implementing these three new methods into the .initiateAttack() method. 438 www.it-ebooks.info
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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 5 An Introduction to Game D
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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 10 Directing the Cast of Ac
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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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Page 454 and 455: ■ index Background image (cont.)
Page 456 and 457: ■ index InvinciBagel animation (c
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Page 460 and 461: Beginning Java 8 Games Development
Page 462 and 463: This Java 8 Game Development book i
Page 464 and 465: ■ Contents NetBeans 8.0 Is User I
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Page 468 and 469: ■ Contents Creating a Hero Superc
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Page 474 and 475: About the Author Wallace Jackson ha
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