Shooting Game - losing life problem
Hi, I am trying to create as simple game in which a ship shoots asteroids - which seems to work although I do get errors :
Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
I am also detecting a ship - asteroid collision which when it happesns the first time makes the ship glow red gotoAndPlay(6);
but after 4 collisions i want the ship to disappear gotoAndPlay(87) but this part doesn't work. Thanks in advance
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
import flash.display.Sprite;
var countCollisions:Number =0 ;
var astArray:Array = new Array();
var speed:Number = 10;
//initializes variables.
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
var key_space:Boolean = false;
var shootLimiter:Number=0;
//Checks if the player presses a key.
var timer:Timer = new Timer(2000, 10);
timer.addEventListener(TimerEvent.TIMER, AddAsteroid);
timer.start();
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
var ship:MovieClip = new Ship()
var backgr:MovieClip = new Background();
backgr.x = 0;
backgr.y = 45;
addChild(backgr);
addChild(ship);
function AddAsteroid(e:TimerEvent):void
{
var asteroid:MovieClip = new Asteroid();
asteroid.x = 800;
asteroid.y = Math.round(Math.random()*700);
astArray.push(asteroid);
addChild(asteroid);
asteroid.addEventListener(Event.ENTER_FRAME,asteroidmove);
function asteroidmove(e:Event):void
{
asteroid.x--
for(var i=0; i<astArray.length; i++)
{
if(astArray.hitTestObject(ship))
{
countCollisions++;
ship.gotoAndPlay(6);
if(countCollisions ==4)
{
ship.gotoAndPlay(87);
}
removeChild(astArray);
removeEventListener(Event.ENTER_FRAME,asteroidmove);
}
}
}
}
addEventListener(Event.ENTER_FRAME,backgroundmove);
function backgroundmove(e:Event):void
{
backgr.x -= 1;
if(backgr.x < -2110)
{
backgr.x = 0;
}
}
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
}
//create the function KeyDown.
function KeyDown(event:KeyboardEvent){
if(event.keyCode == 37){ //checks if left arrowkey is pressed.
key_left = true;
}
if(event.keyCode == 39){ //checks if right arrowkey is pressed.
key_right = true;
}
if(event.keyCode == 38){ //checks if up arrowkey is pressed.
key_up = true;
}
if(event.keyCode == 40){ //checks if down arrowkey is pressed.
key_down = true;
}
if(event.keyCode == 32){ //checks if down arrowkey is pressed.
key_space = true;
}
}
function KeyUp(event:KeyboardEvent){
if(event.keyCode == 37){ //checks if left arrowkey is released.
key_left = false;
}
if(event.keyCode == 39){ //checks if right arrowkey is released.
key_right = false;
}
if(event.keyCode == 38){ //checks if up arrowkey is released.
key_up = false;
}
if(event.keyCode == 40){ //checks if down arrowkey is released.
key_down = false;
}
if(event.keyCode == 32){ //checks if down arrowkey is released.
key_space = false;
}
}
function CheckKeys()
{
shootLimiter += 1;
if(key_left)
{
setDirection(1);
ship.x -= 5;
}
if(key_right)
{
setDirection(0);
ship.x += 5;
}
if(key_up){
ship.y -= 5;
}
if(key_down){
ship.y += 5;
}
if((key_space) && (shootLimiter > 8))
{
shootLimiter = 0;
var b = new Bullet();
addChild(b);
b.x = ship.x + 50;
b.y = ship.y + 3;
addEventListener(Event.ENTER_FRAME,moveBullet);
}
function moveBullet(e:Event):void
{
b.x +=10;
if(b.x > 600)
{
if(contains(b))
{
removeChild(b);
}
removeEventListener(Event.ENTER_FRAME,moveBullet);
}
for(var i=0; i<astArray.length; i++)
{
if(astArray.hitTestObject(b))
{
removeChild(b);
removeChild(astArray);
removeEventListener(Event.ENTER_FRAME,moveBullet);
}
}
}
}
function setDirection(param) {
if (param == 0) {
ship.scaleX = 1;
} else {
ship.scaleX = -1;
}
}
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