// CSE 190m, Flash Sessions
// Homework 2
// Instructor provided code that you SHOULD modify

package {
    import flash.display.Sprite;
    import flash.events.Event;
    
    [SWF(backgroundColor="#000000", frameRate="50", width="500", height="500")]    
    
    public class GravityMain extends Sprite {
        
        public function GravityMain():void {
            // initialize simulation
            drawPlanet();
        }
        
        // draws a red planet in the center of the stage
        private function drawPlanet():void {
            graphics.beginFill(0xFF0000);
            graphics.drawCircle(stage.stageWidth / 2, stage.stageHeight / 2, 30);
            graphics.endFill();
        }
        
        // event handler for the enter frame event; runs multiple times a second.
        private function onEnterFrame(e:Event):void {
            
        }
        
        // accepts a Moon object and a target x and y and "pulls" the moon
        // toward the target coordinates by applying a pseudo-gravitational
        // force.
        private function gravitate(m:Moon, tx:Number, ty:Number):void {
            
        }
    }
}