| 摘要 |
<p>There is provided a method for providing position information in a 3D coordinates system based on user's touch position on an input device. It comprises, at the side of the input device, steps of changing orientation of the input device to a first state; determining information about touch position in response to a user's touch; determining information about orientation change between the first state and a default state; wherein, the information about the touch position and the information about orientation change are used to determine the position information in the 3D coordinates system.</p> |
