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POtower defense game in as3 adding the enemy
 

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    <p>ok so i have been creating tower defense game off of a tutorial. I finished the tutorial and it worked fine but i couldn't figure out how to build off of it. So I started all over and built more towers and a second enemy but the problem is that on the first level it works but in the second level it doesn't. I've been working with this for hours i have not found anything. so what i am asking if someone can give me a tutorial or anything that might be of help on arrays and tower defense games in as3 it is kind of a lot of code so i wont post it now unless you really need it</p> <p>heres the tutorial <a href="http://www.flashgametuts.com/tutorials/as3/how-to-create-a-tower-defense-game-in-as3-part-1/" rel="nofollow">http://www.flashgametuts.com/tutorials/as3/how-to-create-a-tower-defense-game-in-as3-part-1/</a></p> <pre><code>stop(); //othervariables var money:int=100;//how much money the player has to spend on turrets var lives:int=20;//how many lives the player has //lvlarray var S:String = 'START'; var F:String = 'FINISH'; var U:String = 'UP'; var R:String = 'RIGHT'; var D:String = 'DOWN'; var L:String = 'LEFT'; var startDir:String;//the direction the enemies go when they enter var finDir:String;//the direction the enemies go when they exit var startCoord:int;//the coordinates of the beginning of the road var lvlArray:Array = new Array();//this array will hold the formatting of the roads lvlArray = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,R,1,1,D,0,0,R,1,1,D,0,0,R,1,1,D,0,0, 0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0, 0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0, S,D,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,R,1,F, 0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0, 0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0, 0,R,1,1,U,0,0,R,1,1,U,0,0,R,1,1,U,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, ]; //enemy1array var currentLvl:int = 1; var gameOver:Boolean = false; var currentEnemy:int = 0;//the current enemy that we're creating from the array var enemyTime:int = 0;//how many frames have elapsed since the last enemy was created var enemyLimit:int = 12;//how many frames are allowed before another enemy is created var enemyArray:Array = new Array();//this array will tell the function when to create an enemy var enemiesLeft:int;//how many enemies are left on the field enemyArray = [//defining the array [2,2,1,1,1],//1's will just represent an enemy to be created [1,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],//another row means another level [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1] ]; function startGame():void{//we'll run this function every time a new level begins for(var i:int=0;i&lt;enemyArray[currentLvl-1].length;i++){ if(enemyArray[currentLvl-1][i] == 1){ enemiesLeft ++; } } } //enemy2array var currentEnemy2:int = 0;//the current enemy that we're creating from the array var enemy2Time:int = 0;//how many frames have elapsed since the last enemy was created var enemy2Limit:int = 15;//how many frames are allowed before another enemy is created function start2Game():void{//we'll run this function every time a new level begins for(var i:int=0;i&lt;enemyArray[currentLvl-1].length;i++){ if(enemyArray[currentLvl-1][i] == 1){ enemiesLeft ++; } } } //lvlcreate var roadHolder:Sprite = new Sprite();//create an object that will hold all parts of the road addChild(roadHolder);//add it to the stage function makeRoad():void{ var row:int = 0;//the current row we're working on var block;//this will act as the block that we're placing down for(var i:int=0;i&lt;lvlArray.length;i++){//creating a loop that'll go through the level array if(lvlArray[i] == 0){//if the current index is set to 0 block = new EmptyBlock();//create a gray empty block block.graphics.beginFill(0x333333); block.graphics.drawRect(0,0,25,25); block.graphics.endFill(); addChild(block); //and set the coordinates to be relative to the place in the array block.x= (i-row*22)*25; block.y = row*25; } else if(lvlArray[i] == 1){//if there is supposed to be a row //just add a box that will be a darker color and won't have any actions block = new Shape(); block.graphics.beginFill(0x111111); block.graphics.drawRect(0,0,25,25); block.graphics.endFill(); block.x= (i-row*22)*25; block.y = row*25; roadHolder.addChild(block);//add it to the roadHolder } else if(lvlArray[i] is String){//if it's a string, meaning a special block //then create a special block block = new DirectBlock(lvlArray[i],(i-row*22)*25,row*25); addChild(block); } for(var c:int = 1;c&lt;=16;c++){ if(i == c*22-1){ //if 22 columns have gone by, then we move onto the next row row++; } } } } //towers function makeTurret(xValue:int,yValue:int):void{//this will need to be told the x and y values var turret:Turret = new Turret();//creating a variable to hold the Turret //changing the coordinates turret.x = xValue+12.5; turret.y = yValue+12.5; addChild(turret);//add it to the stage } function makeTurret2(xValue:int,yValue:int):void{//this will need to be told the x and y values var turret2:Turret2 = new Turret2();//creating a variable to hold the Turrettwo //changing the coordinates turret2.x = xValue+12.5; turret2.y = yValue+12.5; addChild(turret2);//add it to the stage } //enemy1 addEventListener(Event.ENTER_FRAME, eFrame);//adding an eFrame function function eFrame(e:Event):void{ //if there aren't any levels left if(currentLvl &gt; enemyArray.length){ gameOver=true;//set the game to be over //reset all the stats currentLvl = 1; currentEnemy = 0; enemyTime = 0; enemyLimit = 12; enemiesLeft = 0; removeEventListener(Event.ENTER_FRAME, eFrame);//remove this listener removeChild(roadHolder);//remove the pieces of road gotoAndStop('win');//go to the win frame } if(lives&lt;=0){//if the user runs out of lives gameOver=true;//set the game to be over //reset all the stats currentLvl = 1; currentEnemy = 0; enemyTime = 0; enemyLimit = 12; enemiesLeft = 0; removeEventListener(Event.ENTER_FRAME, eFrame);//remove this listener removeChild(roadHolder);//remove the pieces of road gotoAndStop('lose');//go to the lose frame } makeEnemies();//we'll just make some enemies if(enemiesLeft==0){//if there are no more enemies left currentLvl ++;//continue to the next level currentEnemy = 0;//reset the amount of enemies there are start2Game(); startGame();//restart the game } //Updating the text fields txtLevel.text = 'Level '+currentLvl; txtMoney.text = '$'+money; txtLives.text = 'Lives: '+lives; txtEnemiesLeft.text = 'Enemies Left: '+enemiesLeft; } function makeEnemies():void{//this function will add enemies to the field if(enemyTime &lt; enemyLimit){//if it isn't time to make them yet enemyTime ++;//then keep on waiting } else {//otherwise var theCode:int = enemyArray[currentLvl-1][currentEnemy];//get the code from the array if(theCode == 2){//if it's set as 1 var newEnemy:Enemy = new Enemy();//then create a new enemy enemyHolder.addChild(newEnemy);//and add it to the enemyholder } currentEnemy ++;//move on to the next enemy enemyTime = 0;//and reset the time } } //enemy2 addEventListener(Event.ENTER_FRAME, e2Frame);//adding an eFrame function function e2Frame(e:Event):void{ //if there aren't any levels left if(currentLvl &gt; enemyArray.length){ gameOver=true;//set the game to be over //reset all the stats currentLvl = 1; currentEnemy2 = 0; enemy2Time = 0; enemy2Limit = 12; enemiesLeft = 0; removeEventListener(Event.ENTER_FRAME, eFrame);//remove this listener removeChild(roadHolder);//remove the pieces of road gotoAndStop('win');//go to the win frame } if(lives&lt;=0){//if the user runs out of lives gameOver=true;//set the game to be over //reset all the stats currentLvl = 1; currentEnemy2 = 0; enemy2Time = 0; enemy2Limit = 12; enemiesLeft = 0; removeEventListener(Event.ENTER_FRAME, e2Frame);//remove this listener removeChild(roadHolder);//remove the pieces of road gotoAndStop('lose');//go to the lose frame } makeEnemies2();//we'll just make some enemies if(enemiesLeft==0){//if there are no more enemies left currentLvl ++;//continue to the next level currentEnemy2 = 0;//reset the amount of enemies there are start2Game(); startGame();//restart the game } //Updating the text fields txtLevel.text = 'Level '+currentLvl; txtMoney.text = '$'+money; txtLives.text = 'Lives: '+lives; txtEnemiesLeft.text = 'Enemies Left: '+enemiesLeft; } function makeEnemies2():void{//this function will add enemies to the field if(enemy2Time &lt; enemy2Limit){//if it isn't time to make them yet enemy2Time ++;//then keep on waiting } else {//otherwise var theCode:int = enemyArray[currentLvl-1][currentEnemy2];//get the code from the array if(theCode == 2){//if it's set as 1 var newEnemy2:Enemy2 = new Enemy2();//then create a new enemy enemyHolder.addChild(newEnemy2);//and add it to the enemyholder } currentEnemy2 ++;//move on to the next enemy enemy2Time = 0;//and reset the time } } //other //run these functions at the start makeRoad(); var enemyHolder:Sprite = new Sprite(); addChild(enemyHolder); startGame(); start2Game(); </code></pre>
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    1. COOne of the hardest things to get right in game development is ensuring that **nothing** is left over / overflowing from the previous level. Best thing to do is have a level class that holds arrays for all your enemies and stuff and contains a `dispose()` function or similar. Whenever you write code that will add data to the level, make sure you update the `dispose()` function to remove this information.
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      1. USMarty
    2. COi think i have that but....
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    3. COYeah, it's pretty painful. Might do yourself some justice looking at game engines that handle this stuff for you, like PushButton. Haven't looked into it much myself tbh cause I use my own engine, but apparently it's really good: http://pushbuttonengine.com/
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