Game slowing down everytime I reload the level. Memory Leak?
This is my first attempt at a game in AS3. I'm currently experiencing a problem which I'm sure is a result of my poor understanding of programming concepts. My problem is this, every time I call the function to rebuild my level, the game progressively slows down. I've tried to clear everything, but somehow something is still causing the slow down. I'll attach a zip with all of the files, and also I will add the main code to this. Any help us much appreciated!
The attempted clearing happens in a function called cleanup() and the level setting up in setupLevel().
PHP Code:
//KESLER
package {
import flash.display.Sprite;
import flash.geom.Rectangle;
import flash.geom.Point;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.ui.Keyboard;
import Queue;
import flash.text.StaticText;
import flash.system.*;
//class declaration
public class tileEngine extends Object {
//declare variables
//declare variables
private var mapW:int;
private var mapH:int;
private var screenY:int;
private var screenX:int;
private var tileX:int;
private var tileY:int;
private var tiles:Sprite;
private var level:int;
private var levelLength:int;
private var border:Sprite;
private var r:Sprite;
private var screen:Sprite;
private var cover:Cover;
private var updateTimer:Number;
private var scrollSpeed:Number;
private var gamePaused:Boolean;
private var queue:Queue;
private var keysPressed = [false, false, false, false];
private var keyCounters = [0,0,0,0];
private var guy1up:int = 65;
private var guy1down:int = 90;
private var wall:int = 8;
private var levelPassedDelay:int;
public var guy1:Character;
public var lastKeyChange:String;
public var gui:GUI;
private var map:Array;
private var stats:Stats;
//class constructor function
public function tileEngine (rootMC:Sprite) {
r = rootMC;
screenY = 450;
screenX = 450;
tileX = 40;
tileY = 40;
level = 1;
setupLevel();
}
private function setupLevel():void {
r.addEventListener(Event.ENTER_FRAME,updateGame);
gamePaused = false;
scrollSpeed = 3;
levelPassedDelay = 0;
updateTimer = tileX;
buildMap();
buildBorder();
buildGUI();
buildCharacters();
stats= new Stats();
r.addChild(stats);
}
public function buildMap():void {
tiles = new Sprite();
r.addChild(tiles);
tiles.y = 5;
map = Maps.getMap(level);
levelLength = (map[0].length*tileX-300); //length of level in pixels
var x1:int = Math.ceil(screenX/tileX)+1; //give the screen a little buffer
var y1:int = Math.floor(screenY/tileY);
queue = new Queue();
for(var n=0; n<x1;n++) {
var column:Sprite = new Sprite();
column.x=n*tileX;
for(var m=0;m<y1;m++) {
var tile:Tile = new Tile();
tile.type = map[m][n];
tile.gotoAndStop(tile.type);
tile.x = 0;
tile.y = tileY*m;
column.addChild(tile);
}
tiles.addChild(column);
queue.push(column);
}
}
private function buildBorder():void {
border = new Sprite();
border.graphics.lineStyle(10, 0x00000);
border.graphics.drawRect(4, 4, 442, 442);
border.graphics.endFill();
r.addChild(border);
}
private function buildGUI():void {
gui = new GUI();
gui.key1.gotoAndStop(3);
gui.key2.gotoAndStop(4);
r.addChild(gui);
}
private function buildCharacters(){
guy1up = 65;
guy1down = 90;
guy1 = new Character();
guy1.isDead = false;
guy1.ID = "guy1";
guy1.claimedPos = Maps.getCharPos(level)[0];
guy1.x = 70;
guy1.y = guy1.claimedPos*tileY+guy1.radius;
guy1.keyUP = 1;
guy1.keyDOWN = 2;
r.addChild(guy1);
}
private function updateGame(event:Event):void {
if(!gamePaused) {
scrollScreen();
moveCharacters();
} else {
levelPassed();
}
}
private function levelPassed() {
if(levelPassedDelay==0) {
cover = new Cover();
r.addChild(cover);
}
if(levelPassedDelay < 120) {
guy1.x+=guy1.speed;
levelPassedDelay++;
} else {
level++;
cleanup();
setupLevel();
}
}
private function cleanup() {
r.removeChild(cover);
r.removeChild(tiles);
r.removeChild(guy1);
r.removeChild(gui);
r.removeChild(border);
r.removeChild(stats);
queue = null;
r.removeEventListener(Event.ENTER_FRAME,updateGame);
flash.system.System.gc();
flash.system.System.gc();
}
private function scrollScreen():void {
if((screenX-tiles.x+tileX) > levelLength) {
gamePaused = true;
} else {
tiles.x-=scrollSpeed;
updateTimer-=scrollSpeed; //this timer controls when new tiles are created and removed
if(updateTimer < 1) {
updateMap();
}
}
}
private function updateMap() {
updateTimer+=tileX;
tiles.removeChild(queue.pop());
var curColumn:int = Math.ceil((screenX-tiles.x)/tileX)+1; //calculates the column of tiles to add
var y:int = Math.floor(screenY/tileY); //how many rows
var column:Sprite = new Sprite();
column.x = (curColumn-1)*tileX;
for(var i=0;i<y;i++) {
var tile:Tile = new Tile();
tile.type = map[i][curColumn];
tile.gotoAndStop(tile.type);
tile.y = tileY*i;
column.addChild(tile);
}
queue.push(column);
tiles.addChild(column);
}
private function moveCharacters(){
if(guy1.isDead) {
hitWall();
}
if(!guy1.isDead) {
var updatedPos = Math.floor((guy1.claimedPos*tileY-guy1.y+guy1.radius)/guy1.speed);
if(updatedPos < 0) {
guy1.y-=guy1.speed;
} else if(updatedPos > 0) {
guy1.y+=guy1.speed;
}
} else
guy1.x-=scrollSpeed;
checkCurrentTile(guy1);
}
public function checkCurrentTile(guy:Character):void{
var xTile = Math.floor((-1*(tiles.x-guy.x+(guy.radius*2)))/tileX)+2;
var yTile = Math.floor(guy.y/tileY);
var tile_type = map[yTile][xTile];
if(tile_type > wall) {//WALL
guy.isDead = true;
}
}
private function hitWall():void {
if(levelPassedDelay==0) {
updateTimer+=1000;
scrollSpeed=.2;
cover = new Cover();
r.addChild(cover);
}
if(levelPassedDelay < 120) {
levelPassedDelay++;
} else {
cleanup();
setupLevel();
}
}
private function checkWall(guy:Character,dir:String) {
if(dir == "up") {
var addition = -1;
} else {
var addition = 1;
}
var xTile = Math.floor((-1*(tiles.x-guy.x+(guy.radius*2)))/tileX)+2;
var yTile = guy.claimedPos+addition;
var leftTile = map[yTile][xTile-1];
var middleTile = map[yTile][xTile];
var rightTile = map[yTile][xTile+1];
if(leftTile > wall && middleTile > wall && rightTile > wall)
return false;
return true;
}
public function keysDown(event: KeyboardEvent): void{
if(event.keyCode == guy1up){
if(guy1.claimedPos > 1)
if(checkWall(guy1,"up"))
guy1.claimedPos--;
}
if(event.keyCode == guy1down){
if(guy1.claimedPos < 10)
if(checkWall(guy1,"down"))
guy1.claimedPos++;
}
}
}
}
