Ok so I have problem with changing frame.(I'll say it step-by-step)Basically I created from jpeg->MovieClip(record),and in this movieclip I created manually button.Then in MainClass by addchild(record) I added it to the stage.Now by modifications on class record I created functional button,and now by clicking it I wants to go to the prevFrame.
public class MainClass extends MovieClip
{
var x:boolean=false;
static var ramka3:MovieClip;
public function MainClass()
{
stop();
this.addEventListener(Event.ENTER_FRAME,rrr);
}
function rrr():void
{
if(x==false)
{
x=true;
ram3 = new record ();
ram3.x = stage.stageWidth / 20;
ram3.y = stage.stageHeight / 4;
ram3.width = stage.stageWidth / 1.1;
ram3.height = stage.stageHeight / 2;
addChild(record);
}
}
Record Class:
public class record extends MovieClip
{
public function record()
{
Restart.addEventListener(MouseEvent.CLICK,RestartGame);
MainMenu.addEventListener(MouseEvent.CLICK,RestartGame);
}
function RestartGame(event:MouseEvent):void
{
var button:DisplayObject = DisplayObject(event.currentTarget);
if (button==Restart)
{
gotoAndStop(2);//nothing do
}
if (button==MainMenu)
{
}
}
Related
So I have 2 classes Main and Enemy. In Enemy class I need to use variables that are declared in Main class.
Here is my Main class:
public class Script extends MovieClip {
var hero:MovieClip;
var enemy:MovieClip; //These variables are only for example
public function Game() {
hero.x = 100;
enemy.x = 200; // that's only example
}
function collisionDetected() {
enemy.hitBack(); // this is how I call hitBack function from Enemy class
}
}
And here is my Enemy class:
public class Enemy extends MovieClip {
private var count = 0;
public function hitBack() {
count = 0;
this.addEventListener(Event.ENTER_FRAME, myEnterFrame);
}
private function myEnterFrame(e:Script)
{
if (count == 20) this.removeEventListener(Event.ENTER_FRAME, myEnterFrame);
else
{
count++;
if (hero.x < enemy.x) { //here I need to use variables from Main class
this.x -= 4;
}
else {
this.x += 4;
}
}
}
I got following errors:
1120: Access of undefined property hero.
1120: Access of undefined property enemy.
You will either need to move that calculation out to the Main class, or you could also pass in the variables to the enemy class. Since your example is stripped down I'm not sure what is best in your case but I would lean towards moving the calculation out, assuming you have more than one enemy trying to do this.
public class Script extends MovieClip {
var hero:MovieClip;
var enemy:MovieClip; //These variables are only for example
public function Game() {
hero.x = 100;
enemy.x = 200; // that's only example
this.addEventListener(Event.ENTER_FRAME, enterFrame);
}
function collisionDetected() {
enemy.hitBack(); // this is how I call hitBack function from Enemy class
}
function enterFrame(e:Event){
theEnemyMovieclipClass.myEnterCheck(hero,enemy);
}
public class Enemy extends MovieClip {
private var count = 0;
public function hitBack() {
count = 0;
}
public function myEnterCheck(hero,enemy)
{
if (count == 20) {
// DO SOMETHING
}
else
{
count++;
if (hero.x < enemy.x) { //here I need to use variables from Main class
this.x -= 4;
}
else {
this.x += 4;
}
}
}
}
This way if you had more than one you could loop through all of them and call the same method onEnterFrame.
I'm still really new about classes and stuffs. So, I tried making this and I got an error: Access of undefined property.
Why speedX and speedY var still error although I've defined it in public var in the main class?
Thanks!
EDITED: I've tried calling the variables from other class with main.speedX and main.speedY
But it got error : Cannot access a property or method of a null object reference.
at Ball/moveBall()
This is the Main code:
package
{
import flash.display.MovieClip;
import flash.events.Event;
public class Main extends MovieClip
{
public var speedX:Number = 5;
public var speedY:Number = 5;
public var speedMax:Number = 10;
private var ball:MovieClip = new Ball();
private var paddle:MovieClip = new Paddle();
public function Main()
{
paddle.addEventListener(Event.ENTER_FRAME, movePaddle);
addChild(ball);
addChild(paddle);
}
}
}
This is the Ball Movie Clip Code:
package
{
import flash.display.MovieClip;
import flash.events.Event;
public class Ball extends MovieClip
{ public var main:Main;
public function Ball()
{addEventListener(Event.ENTER_FRAME, moveBall);
main= new Main();
}
public function moveBall(e:Event):void
{
x += main.speedX;
y += main.speedY;
}
}
}
That's because your class Ball cannot access speedX and speedY inside the event callback. Why not add speedX and speedY to your Ball class directly instead ?
public class Ball extends MovieClip
{
public var speedX:Number;
public var speedY:Number;
public function Ball(sX:Number = 0, sY:Number = 0)
{
this.speedX = sX;
this.speedY = sY;
addEventListener(Event.ENTER_FRAME, moveBall);
}
public function moveBall(e:Event):void
{
x += speedX;
y += speedY;
}
}
Here's another possible solution where you would be passing main to ball to use the values of speed stored in Main.
public class Main extends MovieClip
{
public var speedX:Number = 5;
private var ball:MovieClip;
public function Main()
{
ball=new Ball(this);
addChild(ball);
}
}
and
public class Ball extends MovieClip
{
private var _main:Main;
public function Ball(main:Main)
{
_main=main;
addEventListener(Event.ENTER_FRAME, moveBall);
}
public function moveBall(e:Event):void
{
x += _main.speedX;
}
}
}
I am currently trying to get acclimated to FlashDevelop, but am having trouble moving an entity, despite following tutorials very closely.
public class Main extends Engine
{
private var gameWorld:MyWorld;
public function Main()
{
super(800, 600, 60, false);
gameWorld = new MyWorld;
}
override public function init():void
{
FP.world = gameWorld;
trace("FlashPunk has started successfully!");
}
}
public class MyWorld extends World
{
private var gameEntity:MyEntity;
public function MyWorld()
{
gameEntity = new MyEntity();
add(gameEntity);
}
override public function update():void
{
//trace("MyEntity updates");
}
}
public class MyEntity extends Entity
{
[Embed(source = "dragon.png")] private const PLAYER:Class;
public function MyEntity()
{
name = "player";
graphic = new Image(PLAYER);
}
override public function update():void
{
x += 10;
y += 5;
//if (Input.check(Key.LEFT)) { x -= 5; }
//if (Input.check(Key.RIGHT)) { x += 5; }
//if (Input.check(Key.UP)) { y -= 5; }
//if (Input.check(Key.DOWN)) { y += 5; }
}
override public function added():void
{
trace("Entity added");
}
}
It is supposed to move across the screen, but does not for some reason. Any thoughts?
I am new to AS3 and I try to make a simple flash game.
My problem concerns accessing a specific array outside of its class.
I succeeded accessing some variables and function but I am quite stuck on this one.
There are 3 classes : Game which is the main class tied to the flash file, Level1 which spawn background element and enemies, and finally the Enemy class.
The Game class instantiate the Level1 class which spawn enemies (with Enemy class) and push them to an array.
When the enemy get hit, a method in the Enemy class remove it from the display list and then tries to remove it from the array located in the Level1 Class, wich fails and throw :
1119: Access of possibly undefined property level1 through a reference with static type Class.
Another problem is some time the bullets stop in the middle of screen, I havn't been able to track down this bug as well.
Any way, this is my first code related post and if it's too messy, tell me and I'll try to make it more readable.
Sorry for any inconveniance and thank you for your help
-Yaniv
package
{
import flash.display.MovieClip;
import flash.events.MouseEvent;
import flash.events.Event;
import flash.text.*;
import flash.geom.Point;
public class Game extends MovieClip
{
public var player:Player;
public var level1:Level1;
public var bullet:Bullet;
private var bullets_arr:Array;
var fire_on : Boolean;
var fire_counter : int;
public function Game()
{
level1=new Level1(this.stage);
player = new Player ;
addChild(player);
player.y = 600;
bullets_arr = [];
addEventListener(Event.ENTER_FRAME,Main);
stage.addEventListener(MouseEvent.MOUSE_DOWN,mouseDownHandler);
stage.addEventListener(MouseEvent.MOUSE_UP,mouseUpHandler);
}
function mouseDownHandler($e:MouseEvent):void
{
fire_on = true;
}
function mouseUpHandler($e:MouseEvent):void
{
fire_on = false;
fire_counter = 0;
}
function fire():void
{
bullet = new Bullet ;
addChild(bullet);
bullet.x = player.x;
bullet.y = player.y - 32;
bullets_arr.push(bullet);
}
public function Main(e: Event):void
{
player.x = mouseX;
if (bullets_arr)
{
for (var m:int = 0; m < bullets_arr.length; m++)
{
bullets_arr[m].y -= 20;
if(level1.enemies_arr)
{
for (var n:int = 0; n < level1.enemies_arr.length; n++)
{
if (bullets_arr[m])
{
if (level1.enemies_arr[n])
{
if (level1.enemies_arr[n].hitTestObject(bullets_arr[m]))
{
if(bullets_arr[m].parent)
{
bullets_arr[m].parent.removeChild(bullets_arr[m]);
bullets_arr.splice(bullets_arr[m],1);
level1.enemies_arr[n].DoDamage(10);
}
}
}
}
}
}
}
}
if(fire_on)
{
fire_counter++;
if(fire_counter == 01)
{
fire();
}
else if(fire_counter >5)
{
fire_counter =0;
}
}
}
}
}
package {
import flash.display.MovieClip;
import flash.display.Stage;
import flash.events.Event;
public class Level1 extends MovieClip{
var i:int;
var j:int;
var frame :int;
public var enemy:Enemy;
public var enemies_arr:Array;
public function Level1(target:Stage)
{
frame = 0;
enemies_arr = [];
for (var i:int = 0; i < 3; i++)
{
for (var j:int = 0; j < 3; j++)
{
enemy = new Enemy;
enemy.x = j*100 + 260;
enemy.y = i*40 - 150;
target.addChild(enemy);
enemies_arr.push(enemy);
}
}
}
}
}
package
{
import flash.display.MovieClip;
public class Enemy extends MovieClip
{
var Health : int;
var splash:Splash;
function Enemy()
{
Health =30;
}
public function DoDamage(Damage:int)
{
Health -= Damage;
if (Health <= 0)
{
Die();
}
}
public function Die()
{
if(this.parent)
{
this.parent.removeChild(this);
//HERE IS THE ERROR
Game.level1.enemies_arr.splice(this,1);
}
}
}
}
The syntacitical problem you're running into is that you're trying to get level1 from the class Game, when level1 is an instance variable, not a static variable. As an instance variable, level1 is a completely different variable for each instance of game, so if you simply say Game.level1, the compiler wonders, "Which Game?"
To change this, you could simply change level1 into a static variable, by changing this:
public var level1:Level1;
to this:
public static var level1:Level1;
That way the variable would be the same across all instances, and you shouldn't have any trouble accessing it on this line:
Game.level1.enemies_arr.splice(this,1);
I will say though that there could be issues here with certain design principles (it may be that you should use callbacks or signals or something for modularity), but the quick-and-easy fix is to just add the word static to level1's declaration.
You should call level1 on the Game instance.
In a simple way, you could define the Game as Singleton
public class Game extends MovieClip {
private static var _instance:Game;
public static function getInstance():Game {
if (_instance == null) {
_instance = new Game();
}
return _instance ;
}
}
So the Die function will be like this
public function Die()
{
if(this.parent)
{
this.parent.removeChild(this);
//HERE IS THE ERROR
Game.getInstance().level1.enemies_arr.splice(this,1);
}
}
up until now, the way i've been needing to handle my own custom events is by adding an event listener to the object that was dispatching the custom event. while this method of event handling works just fine, i've come to the point where i would like my custom events to be globally accessible, where the listening object does not need to be the same object that is dispatching the event.
in this example, my main Controller class is instantiating and adding to the display list 2 sprite classes: Square and Triangle. the 4th and final class is a custom event called ColorChangeEvent.
i'm attempting to dispatch a new ColorChangeEvent from the Square class, which uses a timer to dispatch a new random color once every second, while Triangle will listen for the dispatched event and change its fill color to the color that was dispatched by Square.
Controller.as:
package
{
import flash.display.Sprite;
public class Controller extends Sprite
{
public function Controller()
{
var sq:Square = new Square();
sq.x = sq.y = 100;
var tr:Triangle = new Triangle();
tr.x = tr.y = 250;
addChild(sq);
addChild(tr);
}
}
}
Square.as:
package
{
import flash.display.Sprite;
import flash.events.TimerEvent;
import flash.utils.Timer;
public class Square extends Sprite
{
public function Square()
{
graphics.beginFill(0x999999);
graphics.drawRect(0, 0, 100, 100);
graphics.endFill();
var myTimer:Timer = new Timer(1000);
myTimer.addEventListener(TimerEvent.TIMER, dispatchNewColor);
myTimer.start();
}
private function dispatchNewColor(evt:TimerEvent):void
{
var randomColor:Number = Math.random() * 0xFFFFFF;
trace("Square Class Dispatched: " + randomColor);
dispatchEvent(new ColorChangeEvent(ColorChangeEvent.CHANGE, randomColor));
}
}
}
Triangle.as:
package
{
import flash.display.Sprite;
import flash.geom.ColorTransform;
public class Triangle extends Sprite
{
public function Triangle()
{
graphics.beginFill(0x999999);
graphics.moveTo(0, 0);
graphics.lineTo(100, 50);
graphics.lineTo(-50, 150);
graphics.endFill();
addEventListener(ColorChangeEvent.CHANGE, changeColor);
}
private function changeColor(evt:ColorChangeEvent):void
{
var ct:ColorTransform = new ColorTransform;
ct.color = evt.color;
transform.colorTransform = ct;
trace("Triangle Class Received: " + evt.color);
}
}
}
ColorChangeEvent.as:
package
{
import flash.events.Event;
public class ColorChangeEvent extends Event
{
public static const CHANGE:String = "change";
public var color:Number;
public function ColorChangeEvent(type:String, color:Number)
{
super(type);
this.color = color;
}
override public function clone():Event
{
return new ColorChangeEvent(type, color);
}
}
}
needless to say, this isn't working.
of course, i could add the event listener to the Square instance in the Controller class, who's event handler could pass that value to Triangle via a public function to change the color, but this is exactly the kind of limitation i'm trying to avoid.
it's not always easy to access and pass a value to a class from where the custom event is dispatched, which is why i'm looking for an actual global solution to handling custom events.
I have been using this class for some time now. To use it you would do this in square:
data.EventManager.instance.publish("someName", randomColor);
and then in your Triangle:
data.EventManager.instance.subscribe("someName", handleColorChange);
private function handleColorChange(color:Number):void {
// implementation here
}
You can even pass the ColorChangeEvent instead of just the color.
data.EventManager.instance.publish(ColorChangeEvent.CHANGE, new ColorChangeEvent(ColorChangeEvent.CHANGE, randomColor);
And then
data.EventManager.instance.subscribe(ColorChangeEvent.CHANGE, handleColorChange);
private function handleColorChange(colorChangeEvent:ColorChangeEvent):void {
// implement here
}
I removed a lot of code that is specific to my projects, so I am not 100% it is usable exactly as-is. But, you should be able to modify it to get it working correctly. If not, let me know and I can try to work it out with you.
This class handles additional things that I will not go into, though you are free to explore. Be aware, however, that anything that subscribes for event notification has a strong reference by the EventManager. That means that if you want to destroy something for garbage collection, you need to call EventManager.instance.cancel(ColorChangeEvent.CHANGE, handleColorChange) before the Triangle instances can be collected.
package data {
import flash.utils.*;
public class EventManager extends Object {
private var _subscribers:Dictionary;
private var _calls:Dictionary;
private var _feeds:Dictionary;
private var _requests:Dictionary;
private var _notify:Dictionary;
private var _services:Dictionary;
private static var __instance:EventManager;
public function EventManager() {
if (__instance) {
trace("EventManager is a Singleton class which should only be accessed via getInstance()");
}
_feeds = new Dictionary(true);
_subscribers = new Dictionary(true);
_requests = new Dictionary(true);
_services = new Dictionary(true);
_notify = new Dictionary(true);
}
public function getFeedData($name:String) {
if (_feeds[$name]) {
return _feeds[$name];
}
return undefined;
}
public function unpublish($name:String) {
var _post:* = _feeds[$name];
delete _feeds[$name];
return _post;
}
public function cancel($name:String, $subscriberFunc:Function, ...args): void {
var _cnt:Number;
var _subscriberArray:Array;
if (_subscribers[$name]) {
for (_cnt = 0; _cnt < _subscribers[$name].length; _cnt++) {
if (_subscribers[$name][_cnt] == $subscriberFunc) {
_subscribers[$name].splice(_cnt, 1);
}
}
}
if (_requests[$name]) {
_subscriberArray = _requests[$name];
_cnt = _subscriberArray.length;
while (_cnt > 0) {
if (_subscriberArray[_cnt] == $subscriberFunc) {
_subscriberArray.splice(_cnt, 1);
}
_cnt--;
}
}
}
public function subscribe($name:String, $subscriber:Function, ...args): void {
var _funcArray:Array;
var _func:Function;
if (_feeds[$name]) {
$subscriber(_feeds[$name]);
}
if (! _subscribers[$name]) {
_subscribers[$name] = new Array();
}
_subscribers[$name].push($subscriber);
if (_notify[$name]) {
_funcArray = _notify[$name];
for each (_func in _funcArray) {
_func();
}
delete _notify[$name];
}
}
public function request($name:String, $feedFunction:Function): void {
var _requestArray:Array;
var _request:Function;
if (! _feeds[$name]) {
if (! _requests[$name]) {
_requests[$name] = new Array();
}
_requests[$name].push($feedFunction);
} else {
$feedFunction(_feeds[$name]);
}
if (_notify[$name]) {
_requestArray = _notify[$name];
for each (_request in _requestArray) {
_request();
}
delete _notify[$name];
}
}
public function publish($name:String, $data:*, $args:Object = null): void {
var _subscriberArray:Array;
var _func:Function;
var cnt:Number = 0;
_feeds[$name] = $data;
if (_subscribers[$name] != undefined) {
_subscriberArray = _subscribers[$name].slice();
_cnt = 0;
while (_cnt < _subscriberArray.length) {
_func = _subscriberArray[_cnt] as Function;
if ($args) {
_func($data, $args);
}else {
_func($data);
}
_cnt++;
}
}
if (_requests[$name]) {
_subscriberArray = _requests[$name].slice();
delete _requests[$name];
_cnt = 0;
while (_cnt < _subscriberArray.length) {
if (_subscriberArray[_cnt] != null) {
_subscriberArray[_cnt]($data);
}
_cnt++;
}
}
}
public function notify($name:String, $subscriber:Function): void {
if (_requests[$name] || _subscribers[$name]) {
$subscriber();
}else {
if (! _notify[$name]) {
_notify[$name] = new Array();
}
_notify[$name].push($subscriber);
}
}
public static function getInstance(): EventManager {
if (! __instance) {
__instance = new EventManager();
}
return __instance;
}
public static function get instance(): EventManager {
return getInstance();
}
}
}
I got this to work by creating a singleton: EventDispatchSingleton that extends EventDispatcher. It's basically an empty singleton that provides the dispatchEvent and add/removeEventListener methods (these are automatically provided by extending EventDispatcher).
Anywhere I want to dispatch an event I import EventDispatchSingleton and then call EventDispatchSingleton.instance.dispatchEvent(<someEvent>);.
Then, wherever I want to listen to that event, I just import EventDispatchSingleton and call EventDispatchSingleton.instance.addEventListener(eventName, callback);
You should look into event bubbling, specificly I think you will find the Capturing phase of the event propagation useful. Take a read of Event propagation from Adobe LiveDocs. It's in the Flex docs, but it is about AS3 Events.
Also Senocular has a good post on Flash Event Bubbling.