/*

This class makes a platform. 
Its constructor takes a position; that is where the platform stays.

It provides two functions; collides and onIt

collides returns 1 when an object is both near its top and going down fast 
enough to be about to go through the platform

onit returns 1 when an object is near to it-- use for jumping

*/



package {
	import flash.display.Sprite;
	
	public class enemy extends Sprite {
		private var mySymbol : youSymbol;
		private const youSpeed = 6; // how fast the enemy moves

			
		// constructor. makes platform appear in the right place
		public function enemy(myX, myY: Number) {
			mySymbol = new youSymbol();
			mySymbol.x = myX; 
			mySymbol.y = myY; 
			addChild(mySymbol);
			
			
		}

		// call this function every frame to move the enemy
		public function killedMe(playerX, playerY:Number):int {
			var dx, dy:Number;
			// use pythagorean theorem to detect touches
			dx = mySymbol.x - playerX;
			dy = mySymbol.y - playerY;
			if (Math.sqrt(dx*dx+dy*dy)<20) {
				return 1;
			}			
			return 0;
		}

		// call this function every frame to move the enemy
		public function updater(playerX, playerY:Number):void {
						// move you closer to me
			if (mySymbol.x>playerX) { mySymbol.x = mySymbol.x - youSpeed; }
			if (mySymbol.y>playerY) { mySymbol.y = mySymbol.y - youSpeed; }
			if (mySymbol.x<playerX) { mySymbol.x = mySymbol.x + youSpeed; }
			if (mySymbol.y<playerY) { mySymbol.y = mySymbol.y + youSpeed; }

		}
	}
	
}