Level of motion model for semi-dynamic objects in virtual scenes

There always are some semi-dynamic objects in virtual scenes for enhancing realistic immersion, such as trees, flame and smoke. In order to solve the problem of lower rendering speed brought by graphically modeling the action of these objects, level of motion (LOM) model for semi-dynamic objects was provided. The definition of semi-dynamic objects was given and LOM model including a multi-levels motion model and an algorithm for controlling the switches between neighbor levels was presented according the characters of semi-dynamic objects. At last, a good example was given to verify LOM model. It is demonstrated that the LOM model is propitious to improve real-time performance as well as increase realistic immersion.