Patent ID: 8799821

Claim:
A method for initiating a user-selected operation on a computer system comprising: sensing a user contacting the user interface device at a first position with one finger of a user; identifying a selection of an object displayed on a display device associated with the first position on the user interface device, the selection of the object being made by the one finger, wherein the selected object represents a three-dimensional object having a shape within a three-dimensional environment; determining whether the one finger is a first finger of the user or is a second finger of the user; wherein when the one finger is the first finger, the method includes: determining a first operation to be performed in response to the first finger selecting the object, wherein the first operation comprises a first manipulation of the three-dimensional object within the three-dimensional environment, the first manipulation involving a change in a display of the shape of the three-dimensional object; and performing the first manipulation on the computer system with respect to the selected object based on a movement of the first finger from the first position to a second position along the user interface device after the object is selected, wherein an amount of the change in the display of the shape of the three-dimensional object is based on a distance the first finger is moved along the user interface device from the first position to the second position; and wherein when the one finger is the second finger, the method includes: determining a second operation to be performed in response to the second finger selecting the object, wherein the second operation comprises a second manipulation of the three-dimensional object within the three-dimensional environment; and performing the second manipulation on the computer system with respect to the selected object, wherein the second operation is distinct from the first operation.