I'm trying to create some sort of game prototype using ActionScript 3.
However, I have run into something that could be called a Catch-22.
package Main{
public class Main extends MovieClip
{
public function Main()
{
//gameLoop()
StartGame()
}
public function StartGame()
{
stage.addEventListener(Event.ENTER_FRAME, gameLoop)
}
var spr = new Symbol6();
public function gameLoop(e:Event):void
{
addChild(Symbol6)
trace("owo")
}
//new Bullet(0,0,5,Math.PI,0,5,0,0)
}
}
The code above outputs:
1037: Packages cannot be nested.
And if I were to remove the package Main block, it would output
1114: The public attribute can only be used inside a package.
How am I supposed to solve this?
Related
I have a parent class called 'main.as'. I am trying to get the child class to call main's function. They both reside in the same folder.
// main.as //
package {
public class main extends MovieClip {
public function main() {
var child:child_mc = new child_mc(this);
}
public function callFunction():void {
trace("Done it");
}
}
}
.
// child.as //
package {
import main;
public class child extends MovieClip {
private var main:MovieClip = new MovieClip();
public function child(main:MovieClip):void {
this.main = main;
main.callFunction();
}
}
}
This is the error I've been getting:
TypeError: Error #1006: callFunction is not a function.
so I tried doing a trace like this
trace(main.callFunction);
and it says undefined. Can someone tell me what I am missing. I get this feeling its a very basic thing that I have overlooked!
Your "child" package is defined as "main". I'm not even sure how it complied, let alone run to the point of showing the error message you got.
I believe the code below should do what you expected.
(I also took the liberty to rename the classes to use CamelCase (with initial caps) to adhere to best practices and to be easier to distinguish from variable names.)
Main.as
package {
public class Main extends MovieClip {
public function Main() {
var child:ChildMC = new ChildMC();
child.main = this;
}
public function callFunction():void {
trace("Done it");
}
}
}
EDIT: I just saw your comment that points out that child_mc is a MovieClip in the Library. I guess then that the child class is set as the Base Class of the child_mc?
If so, you cannot pass properties through the instantiator, you need to find another way to pass along the instance of the Main class to the Child class.
One way would be to add a setter, like the following:
Child.as (Base Class for ChildMC)
package {
public class Child extends MovieClip {
private var _main:Main;
public function Child() {
}
public function set main(main:Main):void {
this._main = main;
this._main.callFunction();
}
}
}
i'm trying to create a flash game, but i'm having trouble with my classes. i'm importing the classes on the main script. they're imported okay, i've tested it all. but i dont know how to use classes inside another class
this is what i've got so far:
class Class.Player {
public static var self:MovieClip;
public static var bullet:Class.Bullet;
function controls() {
//Shoot
if (Key.isDown(Key.SPACE)) {
bullet = new Bullet(100, 100);
}
}
it loads the class and declares the variable, but it claims "Bullet" is not an existing method. it is an existing method, and it works when i call it from the main script.
also, do i need to declare the class like public static var bullet:Class.Bullet;? it's the only way that works for me but wondered if there's a better way?
It looks like you are having problems with the naming of your classes. You don't have to call your classes Class.Name. Just use Name.
In your case, you could have a file called
Player.as
With this content:
package {
import flash.display.MovieClip;
public class Player extends MovieClip {
public private var bullet:Bullet;
public function Player(){
//constructor
}
function controls() {
//Shoot
if (Key.isDown(Key.SPACE)) {
bullet = new Bullet(100, 100);
}
}
}
}
And then a file called
Bullet.as
With this content:
package {
import flash.display.MovieClip;
public class Bullet extends MovieClip {
public function Bullet(x:Number, y:Number){
//constructor
}
}
}
You can read more information about creating and using custom classes here: http://www.flashandmath.com/bridge/intro/class.html
You're putting your package information in the Class name. I have no idea how this is even compiling for you (especially given that Class is a reserved word.
Your files should look more like:
package somePackage {//somePackage instead of the reserved word Class you were using
import someOtherPackage.Bullet;
public class Player extends MovieClip {
public var bullet:Bullet;
public function Player():void {
super();
//other constructor logic here
}
}
}
I'm trying to draw an movie clip object from within a class and directly output it onto the screen. Needless to say, I'm fairly new to actionscript. This is my class:
class Class.player {
function create() {
_root.createEmptyMovieClip("ship", _root.getNextHighestDepth());
ship._x = 200;
ship._y = 390;
ship.beginFill(0xFF00AA);
ship.moveTo(-20, -12);
ship.lineTo(20, -12);
ship.lineTo(20, 12);
ship.lineTo(-20, 12);
ship.lineTo(-20, -12);
ship.endFill();
}
}
And this is the code I'm using to import, call, and execute it.
import Class.player;
var Player:player = new player();
Player.create();
There's no error message, and it works fine if I place the create function into the main script, but nothing happens if I call it from within the class.
Any advice would be appreciated. Thanks!
I would recommend reading this post to help you: http://brianchau.wordpress.com/2008/01/15/targeting-movieclip-from-an-as3-class-file/
The main code from the website is :
package
{
import flash.display.MovieClip;
public class Test extends MovieClip
{
public static var blackbox_mc:MovieClip = new BlackBox();
public function Test()
{
this.stage.addChild(blackbox_mc);
var myTest:Control = new Control();
}
}
}
Create the Control.as class file with the following code:
package
{
public class Control
{
public function Control()
{
Test.blackbox_mc.y = 100;
}
}
}
The trick is to create a static variable so that it can be referenced from the Control.as file.
I'm making an adventure game in AS3 and have many classes. I heard it is best for performance if there is only one Enter Frame function and all update functions run from that.
I currently have a mainGameLoop in my main.as, what is the best way for all my classes to contain an update function running from this single enter frame function?
Here is an example of what I've done to run an update function in my Player class, but I don't like this solution at all.
If anyone could help it'd be much appreciated, thanks.
public class Main extends MovieClip
{
// Initialising variables...
private var m_SceneHandler:SceneHandler;
private var m_UserInput:UserInput;
public function Main()
{
// Adding main update function...
addEventListener( Event.ENTER_FRAME, mainGameLoop );
// Creating the scene handler...
m_SceneHandler = new SceneHandler();
addChild( m_SceneHandler );
}
private function mainGameLoop( event:Event )
{
doUpdate();
}
private function doUpdate():void
{
// Update player...
if (m_SceneHandler.m_aCurrentScene[0].m_Player)
{
m_SceneHandler.m_aCurrentScene[0].m_Player.doUpdate();
}
}
Use the composite pattern and code to an IUpdateable interface.
package view {
public interface IUpdateable {
function doUpdate():void;
}
}
In your main game loop, just switch out which object(s) should be updated:
package{
public class Main extends MovieClip implements IUpdateable {
protected var updateChildren:Vector. = new Vector.();
//other logic would manage who is currently updateable and who is not
public function doUpdate():void {
for each (var updateable:IUpdateable) {
updateable.doUpdate();
}
}
}
}
Then, if there are subcomponents that need to update, they could also be IUpdateable, and the higher level IUpdateable could call the method.
Before firing away, I know there are many questions here on SO that are quite similar. Yet, none of the solutions given were of any help to me, probably because my case is a little different.
I have a main class which loads an external class (separate .as file). In this external class, there are several objects which have tweens and time events bound to them.
What I want to do, is starting the animations when a certain function is called in my Main class. However, I've tried numerous things to stop and/or reset the animations in the external class, so it will start from the beginning if the required function in Main is called.
Main.as:
package {
//required imports
public class Main extends MovieClip {
var myClass:MyClass = new MyClass; //this is the external class
var button:Button = new Button; //movieclip in the library
public function Main() {
addChild(myClass); //I want to do this here so the objects show from the start
//try 1: myClass.gotoAndStop(1);
//try 2: myClass.stop();
button.addEventListener(MouseEvent.MOUSE_CLICK, playAnimation);
}
function playAnimation (e:MouseEvent) {
//try 1: myClass.gotoAndPlay(1);
//try 2: myClass.start();
//try 3: controlling the startTweening() function in MyClass, I tried different ways
}
}
}
The problem starts in the Main class above. I don't want to animate yet!
MyClass.as:
package {
//required imports
public class MyClass extends MovieClip {
//vars
public function MyClass() {
startTweening();
}
function startTweening() {
//tween event
//calling next function (with use of a TimerEvent) after tween is done. This is repeated several times.
}
}
}
Everything in this class works fine, so that's not the problem.
If this makes any difference, I used TweenMax in MyClass for tweening. I didn't use the timeline in the .fla.
Any help would greatly appreciated!
If you don't want to animate at creation of MyClass remove startTweening(); call from the constructor of MyClass.
Make startTweening(); a public function and call it whenever your need with myClass.startTweening().
Here the MyClass
public class MyClass extends MovieClip {
//vars
public function MyClass() {
}
public function startTweening() {
//tween event
//calling next function (with use of a TimerEvent) after tween is done. This is repeated several times.
}
}
and here the Main class
public class Main extends MovieClip {
var myClass:MyClass;
var button:Button = new Button; //movieclip in the library
public function Main() {
myClass = addChild(new MyClass()) as MyClass;
button.addEventListener(MouseEvent.MOUSE_CLICK, playAnimation);
}
function playAnimation (e:MouseEvent) {
myClass.startTweening();
}
}