forked from: Shy Circles

/**
 * Copyright fukt ( http://wonderfl.net/user/fukt )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/oN9j
 */

// forked from hourglasseye's Shy Circles
package
{
    import flash.accessibility.Accessibility;
    import flash.geom.Point;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    
    public class ShyCircles extends Sprite
    {
            private const SIGHT:Number = 200;
            private const DIAMETER:Number = 300;
            
            private const RADIUS:Number = DIAMETER * 0.5;
            private const SIZE:int = int( 465 / DIAMETER );
            
            private const NORMAL_MODE:int = 0;
            private const SINE_MODE:int = 1;
            private const COSINE_MODE:int = 2;
            
            private var mode:int;
            
            public function ShyCircles()
        {
                addEventListener( Event.ADDED_TO_STAGE, function( e:Event ) : void {
                    mode = 0;
                    var circles:Array = [];
                    var cursor:Point = new Point();
                    var circleLocation:Point = new Point();
                    
                    for( var row:int = 0; row < SIZE; row++ )
                    {
                        for( var col:int = 0; col < SIZE; col++ )
                        {
                            var circle:Sprite = new Sprite();
                            circle.graphics.beginFill( 0x000000 );
                            circle.graphics.drawCircle( 0, 0, RADIUS );
                            circle.x = RADIUS + col * DIAMETER;
                            circle.y = RADIUS + row * DIAMETER;
                            circles.push( circle );
                            addChild( circle );
                        }
                    }
                    
                    stage.addEventListener( MouseEvent.CLICK, function( f:MouseEvent ) : void {
                    mode = ++mode > 2 ? 0 : mode;
                    } );
                    
                    addEventListener( Event.ENTER_FRAME, function( f:Event ) : void {
                        var max:int = circles.length;
                        cursor.x = stage.mouseX;
                        cursor.y = stage.mouseY;
                        for( var i:int = 0; i < max; i++ )
                        {
                            var circle:Sprite = circles[i];
                            circleLocation.x = circle.x + RADIUS;
                            circleLocation.y = circle.y + RADIUS;
                            var scale:Number = Point.distance( circleLocation, cursor ) / SIGHT;
                            switch( mode )
                            {
                                case NORMAL_MODE:
                                    scale = scale > 1 ? 1 : scale;
                                    break;
                                case SINE_MODE:
                                    scale = Math.sin( Math.PI * ( scale > 1 ? 1 : scale ) );
                                    break;
                                case COSINE_MODE:
                                    scale = Math.cos( Math.PI * ( scale > 1 ? 1 : scale ) );
                                    break;
                            }
                            circle.scaleX = scale;
                            circle.scaleY = scale;
                        }
                    } );
                } );
        }
    }
}