An Intelligent User Interface with Motion Planning for 3D Navigation
VR '00 Proceedings of the IEEE Virtual Reality 2000 Conference
An intelligent 3D user interface adapting to user control behaviors
Proceedings of the 9th international conference on Intelligent user interfaces
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This paper describes a camera control interface for the exploration of 3D virtual space implemented by using a 2D input device, a joystick. The interface uses a helicopter maneuver metaphor: The viewpoint of the virtual camera is controlled as if the user sits in a helicopter and controls its motion. To control the helicopter by a 2D input device, the 6D space of the helicopter motion is decomposed into six 2D subspaces. The 2D subspaces are visualized by means of the helicopter model and some auxiliary means, e.g. plane meshes and circles, to suggest the kind of motion allowed in each subspace. The visualized subspaces are used as camera control widgets controlled by the 2D input device. The six widgets are arranged so that the transition from one widget to another may be performed by one movement of the input device. This interface provides a simple and consistent kinesthetic correspondence between the movement of the joystick and the motion of the helicopter, i.e. the virtual camera. We have conducted an evaluation of our camera control interface through a questionaire study. Though it indicates that users of different levels find our interface easier to use compared to other interfaces, we need more rigorous evaluation studies to prove it. The main claim of the present paper is that the proposed interface has a cleaner and more logical design obtained by strictly following a good design principle, i.e. systematic decomposition and intuitive visual clues.