BBGamelib.CCBezierBy.update C# (CSharp) Method

		public override void update (float t)
		{
			float xa = 0;
			float xb = _config.controlPoint_1.x;
			float xc = _config.controlPoint_2.x;
			float xd = _config.endPosition.x;
			
			float ya = 0;
			float yb = _config.controlPoint_1.y;
			float yc = _config.controlPoint_2.y;
			float yd = _config.endPosition.y;
			
			float x = bezierat(xa, xb, xc, xd, t);
			float y = bezierat(ya, yb, yc, yd, t);
			
			CCNode node = (CCNode)_target;

			bool stackable = ccConfig.CC_ENABLE_STACKABLE_ACTIONS;
			if(stackable){
				Vector2 currentPos = node.position;
				Vector2 diff = (currentPos - _previousPosition);
				_startPosition = ( _startPosition + diff);
				
				Vector2 newPos = ( _startPosition + new Vector2(x,y));
				node.position = newPos;
				
				_previousPosition = newPos;
			}else{
				node.position = _startPosition + new Vector2(x, y);
			}
		}