Level of motion model for semi-dynamic objects in virtual scenes
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摘要: 为了增强视觉沉浸感,虚拟场景中存在着大量的树木、火焰、烟尘等半动态对象.针对这类对象进行运动描述时计算开销大,严重影响仿真的实时性能的问题,提出一种层次运动模型LOM(Level of Motion).首先给出了半动态对象的定义;然后根据该类对象的特点提出了层次运动模型;最后以树木随风实时摆动行为的建模为实例,对该模型的有效性进行了验证.实验表明该模型的应用可以在保证虚拟场景视觉效果逼真的同时,使仿真获得较为理想的实时性能.Abstract: 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 as 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.
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Key words:
- computer graphics /
- simulation /
- level of motion model
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