Create a shooting game using AS3: Part 8

Today we will add another HUD element - misses.

If an enemy doesn't get killed and reaches the end - you get a miss.

I created another TextField and another variable in my HudDisplay.as, as well as an addMiss element. I also set this thing's depth to second (score is the first):

package cl.kirill
{
import flash.display.MovieClip;
import flash.display.Stage;
import flash.text.TextField;
import flash.events.Event;

public class HudDisplay
{
public var playerScore:Number = 0;
public var playerMisses:Number = 0;
public var showScore:TextField = new TextField();
public var showMisses:TextField = new TextField();
private var _stage;

public function HudDisplay(get_stage:Stage)
{
_stage = get_stage;
_stage.addChild(showScore);
showScore.x = showScore.y = 10;
showScore.width = 50;
showScore.height = 24;
showScore.selectable = false;
showScore.text = "0";
showScore.background = true;
showScore.backgroundColor = 0xCCFDFD;
showScore.addEventListener(Event.ENTER_FRAME, depthChecker);
_stage.addChild(showMisses);
showMisses.x = 10;
showMisses.y = 40;
showMisses.width = 50;
showMisses.height = 24;
showMisses.selectable = false;
showMisses.text = "0";
showMisses.background = true;
showMisses.backgroundColor = 0xFF6464;
showMisses.addEventListener(Event.ENTER_FRAME, depthChecker);
}

public function addScore(amount:Number):void
{
playerScore +=  amount;
showScore.text = playerScore.toString();
}

public function addMiss(amount:Number):void
{
playerMisses +=  amount;
showMisses.text = playerMisses.toString();
}

private function depthChecker(Event):void
{
if (_stage.getChildIndex(showScore)!=(_stage.numChildren-1))
{
_stage.setChildIndex(showScore, _stage.numChildren-1);
}
if (_stage.getChildIndex(showMisses)!=(_stage.numChildren-2))
{
_stage.setChildIndex(showMisses, _stage.numChildren-2);
}
}
}
}

In the enemyManager.as, I add an if() statement in the place where the enemy leaves the screen, which checks if the ship is visible. If it is, then it's a miss.

package cl.kirill
{
import flash.display.MovieClip;
import flash.display.Stage;
import flash.events.Event;

public class EnemyManager extends MovieClip
{
public var enemyArray:Array = [];
private var _stage;
private var _bulletmanager;
private var _hud;
private var speeds:Array = [5,7,10];
private var explosionArray:Array = [];

public function EnemyManager(get_stage:Stage, manager, hud)
{
trace("Enemy manager added");
this.addEventListener(Event.ENTER_FRAME, managing);
_stage = get_stage;
_bulletmanager = manager;
_hud = hud;
}
public function spawnEnemies(num:Number, enemytype:Number):void
{
for (var i:int=0; i<num; i++)
{
var anEnemy:MovieClip = new Enemy();
anEnemy.gotoAndStop(enemytype);
var enemySpeed:Number = speeds[enemytype - 1];
enemyArray.push({mc: anEnemy, eSpeed:enemySpeed});
_stage.addChild(anEnemy);
anEnemy.x = Math.random() * 400;
anEnemy.y =  -  Math.random() * 400;
trace("Enemy spawned: " + anEnemy.height);
}
}
private function managing(Event):void
{
for (var u:int=0; u<enemyArray.length; u++)
{
enemyArray[u].mc.y +=  enemyArray[u].eSpeed;
if (enemyArray[u].mc.y > 450)
{
if (enemyArray[u].mc.alpha == 1)
{
_hud.addMiss(1);
}
enemyArray[u].mc.y =  -  Math.random() * 400;
enemyArray[u].mc.x = Math.random() * 400;
enemyArray[u].mc.alpha = 1;
}

for (var g:int=0; g<_bulletmanager.bulletArray.length; g++)
{
if (_bulletmanager.bulletArray[g].alpha == 1 && enemyArray[u].mc.alpha == 1 && _bulletmanager.bulletArray[g].hitTestObject(enemyArray[u].mc))
{
enemyArray[u].mc.alpha = 0;
_bulletmanager.bulletArray[g].alpha = 0;
var anExplosion:MovieClip = new Explosion();
_stage.addChild(anExplosion);
anExplosion.x = enemyArray[u].mc.x;
anExplosion.y = enemyArray[u].mc.y;
explosionArray.push(anExplosion);
_hud.addScore(10);
}


}

}

for (var l:int=0; l<explosionArray.length; l++)
{
if (explosionArray[l].currentFrame == 15)
{
_stage.removeChild(explosionArray[l]);
explosionArray.splice(l,1);
}

}

}
}
}

And we have a simple little game. Of course, it's not the game of the year, but it is something you can do with classes in AS3. These tutorial series were an example of using OOP to create games.

Thank for reading! I hope you've learnt something useful.

Related:

Create a shooting game using AS3: Part 1
Create a shooting game using AS3: Part 2
Create a shooting game using AS3: Part 3
Create a shooting game using AS3: Part 4
Create a shooting game using AS3: Part 5
Create a shooting game using AS3: Part 6
Create a shooting game using AS3: Part 7