1. A computer implemented method for determining an intensity of user input to a computer system, performed by the computer system that is programmed to perform the method comprising: determining by a display of the computer system, an indication of a position of a first user-controlled user input device relative to the display of the computer system in response to a user-initiated change in state of the first user-controlled user input device relative to the computer system, wherein the user-initiated change in state is also associated with a magnitude of change; determining by a physical sensor of the computer system, the magnitude of change in sensed physical properties by the physical sensor in response to the user-implemented change in state of the first user-controlled user input device relative to the computer system; determining by the computer system, a user selection of a function to perform in response to the indication of the position of the first user-controlled user input device; determining by the computer system, an input parameter associated with the function in response to the magnitude of change in sensed physical properties; and initiating performance by the computer system, of the function in response to the input parameter.