for (var ray:int=0; ray<60; ray++) {
	for (var dis:int=0; dis<8+light; dis++) {
		// light-variable only applies an additional effect, ignore it.

		var xt:int=Math.round((H.x-15)/30)+Math.cos((ray*6)*(Math.PI/180))*dis;
		var yt:int=Math.round((H.y)/30)+Math.sin((ray*6)*(Math.PI/180))*dis;

		if ( target tile is within bounds ) {

			apply shading on target tile

			if ( target tile is solid ) {
				break;
			}

		}

	}
}