A method and apparatus of generating display data based on at least one input display value received from a touch screen device is disclosed. According to one example method of operation the method may include receiving an input display value in a predefined enclosed area of an input domain, and calculating a parametric representation of the received input display value based on the boundaries of the predefined enclosed area in the input domain. The predefined enclosed area may be a triangle. The operations may also include mapping the parametric representation of the input display value to a corresponding output display value in an output domain. The operations may also include displaying the at least one output display value via the display device.