基于Vega Prime的灭火飞机投水特效模拟

摘要

为了模拟某型灭火飞机的投水特效,主要研究了基于粒子系统的投水特效.首先阐述了Vega Prime特殊效果模块中粒子系统的基本原理,然后采用面向视点的多边形来表示水粒子,通过具体设置粒子系统中粒子的颜色、透明度、大小、纹理、速度和位置等属性,逼真的模拟了飞机的投水特效.在模拟的过程中,将环境影响因素考虑进去,使用Vega Prime的API函数实现投水特效的实时性,同时将飞机坐标系中的速度转换到渲染的场景坐标系中,实现了投水特效随着飞机运动的效果.实践证明,使用粒子系统模拟飞机的投水特效,使三维真实感更强.%In order to simulate the special effect of water dropping from a certain firefighting plane in virtual environment, the study is focused on particle system-based water dropping special effect. First, the rationale of particle system in special effect module of Vega Prime is expatiated in the paper. Then the viewpoint-oriented polygons are used to represent the water particles, and through specifically setting the colour, transparency, size, texture, speed and position, etc. Of the particles in particle system, the special effect of water dropping is simulated vividly. In the process of simulation, the influential factors with regard to environment are taken into account, and the API function of Vega Prime is employed to implement the real-time property of special effect of water dropping, meanwhile, by converting the speed in plane coordinates to the coordinates of rendering scene, the effect that the water dropping special effect moves along with the plane are achieved as well. Finally, the practices demonstrate that the use of particle system in simulating special effect of water dropping from plane makes the three-dimension reality much stronger.