Part2 - Shooting Bullets

Author: adiian

README.md

@@ -0,0 +1,17 @@
+Aeroplane Shooting Game Tutorial
+=========
+
+This is a small tutorial written in flash to create an aeroplane shooting game. The tutorial tries to be minimalistic to implment the basic features for such a game and to do it using as low code as possible.
+
+It is structured in 5 parts:
+
+ 1. [Player Movement]
+ 2. [Shooting Bullets]
+ 3. Adding Enemies
+ 4. Collisions
+ 5. Scoring and HUD.
+
+----
+
+[Player Movement]:http://gametuts.org/aeroplane-shooting-game-tutorial-player-movement/
+[Shooting Bullets]:http://gametuts.org/aeroplane-shooting-game-tutorial-shooting-bullets/

lib/AeroplaneTutorial.swf.fla lib/AeroplaneTutorial.flalib/AeroplaneTutorial.swf.fla renamed to lib/AeroplaneTutorial.fla

@@ -1,9 +1,10 @@
 package
 {
+	import flash.display.MovieClip;
 	import flash.display.Sprite;
 	import flash.events.Event;
 	import flash.events.KeyboardEvent;
-
+	
 	[SWF(width=440,height=480,frameRate=60)]
 	public class AeroplaneGameTutorial extends Sprite
 	{
@@ -13,6 +14,11 @@ package
 		private var keys:Vector.<int> = new Vector.<int>(255);
 		private var SPEED:Number = 3;
 
+		private var playerBullets:Vector.<MovieClip> = new Vector.<MovieClip>();
+		private var playerBulletsDelay:Number = 0;
+		
+		private var BULLET_SPEED:Number = 6;
+		
 		public function AeroplaneGameTutorial()
 		{
 			this.addChild(water);
@@ -29,16 +35,43 @@ package
 			this.addEventListener(Event.ENTER_FRAME, enterFrame);
 		}
 
+		private var lastFrameTime:Number = (new Date()).getTime();
+		
 		private function enterFrame(e:Event):void
 		{
+			var thisFrame:Date = new Date();
+			var dt:Number = (thisFrame.getTime() - lastFrameTime) / 1000;
+			lastFrameTime = thisFrame.getTime();
+			
 			water.y += 1;
 			if (water.y > 0)
 				water.y -= 512;
 
 			if (isUp()) plane.y = Math.max(plane.height / 2, plane.y - SPEED);
 			if (isDown()) plane.y = Math.min(stage.stageHeight - plane.height / 2, plane.y + SPEED);
 			if (isLeft()) plane.x = Math.max(plane.width / 2, plane.x - SPEED);;
-			if (isRight()) plane.x = Math.min(stage.stageWidth - plane.width / 2, plane.x + SPEED);			
+			if (isRight()) plane.x = Math.min(stage.stageWidth - plane.width / 2, plane.x + SPEED);	
+			
+			// shoot
+			playerBulletsDelay -= dt;
+			if (isFire() 
+				&& playerBulletsDelay <= 0)
+			{
+				playerBulletsDelay = 0.3;
+				shootPlayerBullet();
+			}		
+			
+			// update bulltes positions
+			for each( var b:MovieClip in playerBullets)
+			{
+				b.y -= BULLET_SPEED;
+			}
+			
+			// remove bullets which are getting out of the screen
+			while(playerBullets.length > 0 && playerBullets[0].y < -10)
+			{
+				this.removeChild(playerBullets.shift());
+			}
 		}
 
 		private function keyUp(e:KeyboardEvent):void
@@ -57,15 +90,31 @@ package
 		private function isDown():Boolean{
 			return (keys[40] || keys[83]);
 		}
-
+		
 		private function isLeft():Boolean{
 			return (keys[37] || keys[65]);
 		}
-
+		
 		private function isRight():Boolean{
 			return (keys[39] || keys[68]);
 		}
 
+		private function isFire():Boolean{
+			return (keys[17]);
+		}		
+		
+		private function shootPlayerBullet():void
+		{
+			var playerBullet:MovieClip = new BulletRes();
+			
+			playerBullet.x = plane.x;
+			playerBullet.y = plane.y - plane.width / 2;
+			
+			this.addChild(playerBullet);
+			
+			playerBullets.push(playerBullet);
+		}
+		
 
 	}