Mega Code Archive
Calculating position based on velocity
<![CDATA[
package {
import flash.display.*;
import flash.events.*;
import flash.utils.*;
public class Main extends Sprite {
private var distancePerSecond:int = 50; // Pixels to move per second
private var now:int; // The current time
private var then:int; // The last screen-update time
private var circle:Shape; // The object to animate
public function Main( ) {
circle = new Shape( );
circle.graphics.beginFill(0x0000FF, 1);
circle.graphics.lineStyle(1);
circle.graphics.drawEllipse(0, 0, 25, 25);
addChild(circle);
then = getTimer( );
now = then;
addEventListener(Event.ENTER_FRAME, enterFrameListener);
}
private function enterFrameListener (e:Event):void {
then = now;
now = getTimer( );
var elapsed:int = now - then;
var numSeconds:Number = elapsed / 1000;
var moveAmount:Number = distancePerSecond * numSeconds;
circle.x += moveAmount;
}
}
}
]]>