/*

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 platform extends Sprite {
		private var mySymbol : platformSymbol;
		private var px, py: Number;  // the top-left corner of the platform
		private const myWidth=100; // make sure the symbol is 100 pix wide!
		
			
		// constructor. makes platform appear in the right place
		public function platform(myX, myY: Number) {
			mySymbol = new platformSymbol();
			mySymbol.x = myX; 
			mySymbol.y = myY; 
			addChild(mySymbol);
			
			px = myX;
			py = myY;
		}

		// return 1 if you're going to hit the platform next step
		public function collides(myX, myY, myyv:Number):int {
			if ( (myX>px) && (myX<(px+myWidth))) {
				if ((myY<py)&&((myY+myyv)>py)) {
					return 1;				
				}
			} 
			return 0;
		}
		
		// return 1 if you're +/-20 pixels over/under the platform
		public function onIt(myX, myY:Number):int { 
			if ( (myX>px) && (myX<(px+myWidth))) {
				if (Math.abs(myY-py)<20.0) {
					return 1;				
				}
			} 
			return 0;		
		}
	}
	
}