Method of generating multi-resolution smoke based on the obscured visibility in virtual environment

The smoke puff in virtual environment can not only make the user have realistic vision apperceive, but also affect user's visibility and operations. Considering the expensive computation for smoke puff, the methods of generating multi-resolution smoke have been studied, since smoke is required by different experimental platforms and has the ability to obscure the visibility in virtual environment. Because usually smoke moves slowly, which is sent out continuously from something burning in virtual environment, the comparability can be found after the comparison between the smoke puff in one of short time-intervals and others. According to Gaussian puffs model, this paper presents a new method of generating multi-resolution smoke puffs based on obscured visibility in virtual environment. With the average of smoke density in one time-interval, it includes smoke emission, smoke merge, and light transmission through smoke cloud while generating multi-resolution smoke. At the same time, it also gives a way to tradeoff smoke resolution and performance according to requirements and computational capabilities of experimental platform, and to estimate the reliability of experiment results.