By Zevan | March 22, 2009
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Actionscript:
stage.frameRate = 30;
const TWO_PI:Number = Math.PI * 2;
var centerX:Number = 200;
var centerY:Number = 200;
var p:Array = new Array();
var zpos:Number;
var xpos:Number;
var ypos:Number;
var depth:Number;
var canvas:BitmapData = new BitmapData(400,400,true,0xFF000000);
addChild(new Bitmap(canvas));
var dy:Number = 0
var dx:Number = 0;
addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
canvas.fillRect(canvas.rect, 0xFF000000);
dx += (mouseX / 100 - dx)/12;
dy += [...]
By Zevan | March 22, 2009
CLICK HERE TO COPY
Actionscript:
// variable is passed into the swf via Javascript (most likely swfObject)
// myswf.swf?myFlashVar="a new value"
var myFlashVar:String = "Some Default Value";
if (root.loaderInfo.parameters.myFlashVar){
myFlashVar = root.loaderInfo.parameters.myFlashVar;
}
Getting at flashvars in AS3 requires a bit more typing than it did in AS2. Above is a technique I find myself using from time to time. Usually for [...]
By Zevan | March 21, 2009
CLICK HERE TO COPY
Actionscript:
var t:Number=0, cos:Number, sin:Number;
var canvas:BitmapData = new BitmapData(400,400,false, 0x000000);
addChild(new Bitmap(canvas));
var shape:Shape = new Shape();
with(shape.graphics) beginFill(0x568338, .2), drawCircle(0,0,10);
addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
t += .1;
// -- low precision sine/cosine
//always wrap input angle to -PI..PI
if (t <-3.14159265){
[...]
Posted in Math, motion | Tagged actionscrpt, flash |
By Zevan | March 20, 2009
CLICK HERE TO COPY
Actionscript:
function uniqueCompare(arr:Array, compare:Function):void {
var leng:int = arr.length;
for (var i:int = 0; i<leng; i++){
for (var j:int = i + 1; j<leng; j++){
compare(arr[i], arr[j]);
}
}
}
var numbers:Array = [1, 2, 3, 4, 5];
uniqueCompare(numbers, compareCallback);
function compareCallback(a:*, b:*):void [...]