Pulse (Sine wave)

by terravilor 28 Sep 2011

Embed

/**
 * Copyright terravilor ( http://wonderfl.net/user/terravilor )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/4fSc
 */

// forked from terravilor's Sine wave
package {
    import flash.events.Event;
    import flash.display.Sprite;
    public class Pulse extends Sprite {
        private var ball:Ball;
        
        private var angle:Number
        private var centerScale:Number;
        private var range:Number;
        private var yspeed:Number;
        public function Pulse() {
            init();
        }
        
        public function init():void {
            ball = new Ball();
            ball.x = stage.stageWidth / 2;
            ball.y = stage.stageHeight / 2;
            addChild(ball);
            
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
            
            //set vars
            angle = 0;
            centerScale = 1;
            range = .5;
            yspeed = .1;
        }
        
        protected function onEnterFrame(event:Event):void {
            ball.scaleX = ball.scaleY = centerScale + Math.sin(angle) * range;
            angle += yspeed;
        }


    }
}

//ball class

import flash.display.Sprite;

class Ball extends Sprite {
    private var radius:Number;
    private var color:uint;
    
    public function Ball(radius:Number = 40, color:uint = 0xff0000) {
        this.radius = radius;
        this.color = color;
        
        init();
    }
    
    public function init():void {
        graphics.beginFill(color);
        graphics.drawCircle(0,0,radius);
        graphics.endFill()
    }
}