基于粒子系统的实时雨雪模拟

雨雪效果的模拟可以大大提高飞行模拟器视景的逼真度，粒子系统是模拟雨雪效果的有效方法。在分析粒子系统的基础上，提出了一种模拟雨雪的实时算法。该算法的基本思想是将全部雨雪粒子分布于眼点前的视区内，高效率地利用有限的粒子来渲染场景。通过恰当选择粒子数量和粒子模型，该算法可以生成逼真的视觉效果并满足视景系统实时性的要求。

Realtime Simulation of Rain and Snow Based on Particle System

Simulation of rain and snow will improve the real degree of flight simulator visual scene greatly. Particle system is a powerful way to simulate rain and snow. A realtime algorithm is presented in this paper to simulate them based on analyzing particle system. The basic idea of this algorithm is to distribute all of rain and snow particles ahead of eye point in order to render visual scene in high efficiency with limited particles. By choosing particle model and particle quantity properly, the algorithm produces realistic visual effect and meets the need of the realtime processing of visual scene.