| Popis: |
We propose a new `time-realistic' computer graphics (CG) simulator using real-time CG in four dimensions including space and time, to solve two fundamental problems of conventional real-time CG systems. First, we implemented a realistic time function to solve the problem of jerky displays. The function is based on a dynamic time control method which can map the CG generation time to the actual real-world time. Each CG frame is displayed by a prediction technique; that is, we can predict the next CG display time by using the current CG display time, since each frame has a coherency. Second, we implemented a realistic view- manipulation function to allow the user to manipulate the view intuitively. The function is based on a dynamic view-control method where the view is controlled according to the identity of CG objects, such as a wall or a floor. The identity can be defined interactively by using new `walk-through attributes'. We developed `Sight', a 3D CG simulator, based on the above two functions, and evaluated time-realistic CG using an experimental CG world. We showed that realistic time has been achieved, since we reduced the time-difference to 1/33 that of conventional real-time CG. The realistic view-manipulation has been also achieved, since any user can easily walk in the CG environment without passing walls and floors. |
