Talking about Ball: Revamped game, Actionscript 3, Flash, Game development and Users contributions.
Today I am glad to publish the work of Tim Edelaar that translated all AS2 files of the most successful post of this blog, Flash game creation tutorial – part 1.
The most interesting thing is he did not use a class, but he wrote the actionscript directly in the timeline in the… let’s call it “AS2 way”.
I said “interesting” because I think this way is easier to understand for all you “afraid to learn AS3” guys.
Obviously I suggest to read Flash game creation tutorial – part 1 before continuing.
In some cases you may need to reload the page to see examples working, because the ball will fly off stage when you are looking at another example.
Then, let’s start with some well commented code:
Moving the hero
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
hero.x -= 5;
}
if(key_right){
hero.x += 5;
}
if(key_up){
hero.y -= 5;
}
if(key_down){
hero.y += 5;
}
}
Moving the hero at a given speed
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:int = 5;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
hero.x -= speed;
}
if(key_right){
hero.x += speed;
}
if(key_up){
hero.y -= speed;
}
if(key_down){
hero.y += speed;
}
}
Moving the hero with acceleration
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed;
}
if(key_down){
yspeed += speed;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
}
The friction
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var friction:Number = 0.98;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed;
}
if(key_down){
yspeed += speed;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
xspeed *= friction;
yspeed *= friction;
}
The gravity
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var friction:Number = 0.98;
var gravity:Number = 0.04;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed;
}
if(key_down){
yspeed += speed;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
xspeed *= friction;
yspeed *= friction;
yspeed += gravity;
}
The thrust
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var friction:Number = 0.98;
var gravity:Number = 0.04;
var thrust:Number = 0.8;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed*thrust;
}
if(key_down){
yspeed += speed*thrust;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
xspeed *= friction;
yspeed *= friction;
yspeed += gravity;
}
The wind
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var friction:Number = 0.98;
var gravity:Number = 0.04;
var thrust:Number = 0.8;
var wind:Number = 0.02;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed*thrust;
}
if(key_down){
yspeed += speed*thrust;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
xspeed += wind;
xspeed *= friction;
yspeed += gravity;
yspeed *= friction;
}
The rotation
//import some important flash libraries.
import flash.events.KeyboardEvent;
import flash.events.Event;
import flash.display.MovieClip;
//initializes variables.
var speed:Number = 0.08;
var xspeed:Number = 0;
var yspeed:Number = 0;
var friction:Number = 0.98;
var gravity:Number = 0.04;
var thrust:Number = 0.8;
var wind:Number = 0.02;
var key_left:Boolean = false;
var key_right:Boolean = false;
var key_up:Boolean = false;
var key_down:Boolean = false;
//Checks if the player presses a key.
stage.addEventListener(KeyboardEvent.KEY_DOWN,KeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,KeyUp);
//Lets the function main play every frame.
addEventListener(Event.ENTER_FRAME,Main);
//create the function main.
function Main(event:Event){
CheckKeys();
MoveHero();
}
//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;
}
}
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;
}
}
function CheckKeys(){
if(key_left){
xspeed -= speed;
}
if(key_right){
xspeed += speed;
}
if(key_up){
yspeed -= speed*thrust;
}
if(key_down){
yspeed += speed*thrust;
}
}
function MoveHero(){
hero.x += xspeed;
hero.y += yspeed;
hero.rotation += xspeed;
xspeed += wind;
xspeed *= friction;
yspeed += gravity;
yspeed *= friction;
}
Now you have no excuses to refuse making a ball game with AS3
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