[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 17-43. Add private void shootProjectile() method and code the if(!takeSides) and if(takeSides) if-else statements If you now use your Run ➤ Project work process you will see your iBeagle animate on screen, shoot a bullet, and retreat quickly back off-screen. The next level of realism that we need to add into our code is to have the iBeagle pause for a second while he aims and shoots the bullet, because currently it looks like he is hitting an invisible barrier and bouncing back off-screen. We will do this by adding counter logic into the if(shootBullet) conditional statement in the .update() method. Let’s do that next, so that we have a completely professional Enemy auto-attack sequence! Making the Enemy Pause Before Firing: pauseCounter Variable To make the Enemy pause on screen, so that his shooting action looks more realistic, and so that the InvinciBagel character has some time to try and tackle him (which we are going to assign ten scoring points to a bit later on), let’s add an integer pauseCounter variable and a boolean launchIt variable at the top of our Enemy.java class, as is shown highlighted in Figure 17-44. Inside of the if(shootBullet) conditional statement, after the shootProjectile() method call, place an if(pauseCounter >= 60) conditional structure, and inside of it, set launchIt equal to true, and reset the pauseCounter variable to zero. In the else part of the condition, increment the pauseCounter by one using pauseCounter++ and then all we have to do is to implement the launchIt boolean flag into our initiateAttack() method and we will have an Enemy character who takes his time when he aims and shoots at the InvinciBagel character. Your <strong>Java</strong> code for this if(shootBullet) if-else structure can be seen in Figure 17-44, and should look like the following code: if(shootBullet) { shootProjectile(); if(pauseCounter >= 60) { launchIt = true; pauseCounter = 0; } else { pauseCounter++ } } www.it-ebooks.info 435
Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine Figure 17-44. Add a pauseCounter variable to create a timer, creating a one-second delay, so Enemy doesn't bounce Shoot the Bullet: Pulling the Trigger Using the launchIt Variable Inside of each of your if(takeSides) and if(!takeSides) conditional if structures, modify the if(onScreen) structure to be an if(onScreen && launchIt) structure instead, and then add a launchit = false; statement into the else portion of this modified structure. The <strong>Java</strong> code for the new if() structure is shown in Figure 17-45, and looks like the following: if(onScreen && launchIt) { destination = 700; if(spriteMoveR
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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 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 16 ■ Collision Detection:
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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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