基于分形特征爆炸烟雾的等熵运动模型

Fractal Based Isentropic Explosive Gas Model

烟雾是虚拟战场特殊效应的重要组成部分 ,因其产生与变化均在瞬时完成 ,要生成其具有真实感的动态图像非常困难 ,关键在于如何建立恰当的模型 .文中提出了一种新的基于分形特征的爆炸烟雾等熵运动模型 ,该模型利用迭代函数系统完成烟雾的造型 ,依照等熵运动规律发生变化 ,从而产生具有真实感的烟雾运动图像 .最后 。

As an important part of special effects in the virtual battlefield, the effects of explosive gas play a key role in the overall system performance. It is difficult to obtain realistic picture of dynamic explosive gas because of its instantaneousness. The crucial step is to establish an appropriate model. In this paper,we present a new model, where iterated function system(IFS) and isentropic expansion rule were introduced to describe its characteristics. Definition of explosive gas and corresponding realization algorithm are presented. As a result, a series of realistic images rendered by this approach are illustrated.