一种小量流血形成的弯曲血槽模型

A Model of Bended Bloodstream with Small Amount Bleeding

特殊效果模拟是虚拟手术系统中的一个重要组成部分,快速准确的特效能够增强手术过程的真实感。流血效果是虚拟手术系统必不可少的特效之一。针对小量流血形成的弯曲血槽的模拟,提出了一个比较简单的模型,采用元球造型的方法绘制血槽。只考虑血流前端动态效果的模拟,血槽部分采用静态绘制。这种动态与静态结合的模拟方法有效地减少了计算开销,真实感明显,具有很好的实时性。

Computer simulation of special effect is an important part of the visual surgery simulation system. Rapid and accurate simulation of special effect can make the visual surgery more realistic. Simulation of bleeding is essential to surgery simulation system. This paper focuses on small amount bleeding appearing in a small injury. It forms a bended bloodstream on the organ surface. A simple model is established. The bloodstream is rendered by the metaballs method. During the simulation, only the dynamic simulation of the leading end of the bloodstream is considered while the rest of the bloodstream is rendered statically. This combination of dynamic simulation and static rendering can reduce the expense of computation and make the model more real and more computationally efficient for real-time animation.