Game Development Reference
In-Depth Information
package com.efg.games.flakcannon
{
import flash.display.Shape;
import flash.display.Sprite
import flash.events.MouseEvent;
import flash.display.Bitmap;
import flash.display.BitmapData;
public class Ship extends Sprite
{
public var imageBitmapData:BitmapData;
public var image:Bitmap;
/*
//**Flex Framework Only
[Embed(source = "assets/flakassets.swf", symbol="ShipGif")]
private var ShipGif:Class;
*/
public function Ship() {
init();
}
public function init():void {
//***** Flex *****
//imageBitmapData = new ShipGif().bitmapData;
//**** Flash *****
imageBitmapData = new ShipGif(0, 0);
image = new Bitmap(imageBitmapData);
addChild(image);
}
public function dispose():void {
removeChild(image);
imageBitmapData.dispose();
image = null;
}
}
}
Creating objects that move on a continuous vector: Enemy
Unlike
BonusPlane
and
Ship
,
Enemy
has some major differences from the
Shot
class. Some of
them come from the fact that we simulate three different types of
Enemy
planes with one class. We
do this by supporting three directions for the
Enemy
planes:
DIR_DOWN
,
DIR_RIGHT
, or
DIR_LEFT
. The
other major change is more substantial. We could have created the movement code in
Enemy
the
same way we created the movement code in both
Shot
and
BonusPlane
. Instead though, we will
introduce a new algorithm for movement that can support an object moving in almost any
direction using an angle.
