import com.lo9ic.Quaternion;

class com.lo9ic.Node {
	private var $x, $y, $z, $xp, $yp, $zp:Number;
	private var $q1, $q2, $q3:Quaternion;
	
	function Node(a:Number, b:Number, c:Number) {
		$x = a ? a : 0; $xp = $x;  
		$y = b ? b : 0; $yp = $y;
		$z = c ? c : 0; $zp = $z;
	}
	
	public function get x():Number {
		return $xp;
	}
	
	public function get y():Number {
		return $yp;
	}
	
	public function get z():Number {
		return $zp;
	}
	
	public function set x(a:Number):Void {
		$x = a;
	}
	
	public function set y(a:Number) :Void {
		$y = a;
	}
	
	public function set z(a:Number):Void{
		$z = a;
	}

	public function rotate(q:Quaternion):Void {
		$q1 = q.copy();
		$q1.invert();
		$q2 = new Quaternion();
		$q2.fromPoint($x, $y, $z);
		$q3 = q.copy();
		$q2.concat($q1);
		$q3.concat($q2);
		$xp = $q3.x;
		$yp = $q3.y;
		$zp = $q3.z;
	}
	
	public function project(a:Number):Void {
		$xp = a*$xp/($zp-a); 
		$yp = a*$yp/($zp-a);
		$zp = $zp;
	}
}