Improved Variational Guiding of Smoke Animations
| dc.contributor.author | Nielsen, Michael B. | en_US |
| dc.contributor.author | Christensen, Brian B. | en_US |
| dc.date.accessioned | 2015-02-23T16:42:41Z | |
| dc.date.available | 2015-02-23T16:42:41Z | |
| dc.date.issued | 2010 | en_US |
| dc.description.abstract | Smoke animations are hard to art-direct because simple changes in parameters such as simulation resolution often lead to unpredictable changes in the final result. Previous work has addressed this problem with a guiding approach which couples low-resolution simulations - that exhibit the desired flow and behaviour - to the final, high-resolution simulation. This is done in such a way that the desired low frequency features are to some extent preserved in the high-resolution simulation. However, the steady (i.e. constant) guiding used often leads to a lack of sufficiently high detail, and employing time-dependent guiding is expensive because the matrix of the resulting set of equations needs to be recomputed at every iteration. We propose an improved mathematical model for Eulerian-based simulations which is better suited for dynamic, time-dependent guiding of smoke animations through a novel variational coupling of the low- and high-resolution simulations. Our model results in a matrix that does not require re-computation when the guiding changes over time, and hence we can employ time-dependent guiding more efficiently both in terms of storage and computational requirements. We demonstrate that time-dependent guiding allows for more high frequency detail to develop without losing correspondence to the low resolution simulation. Furthermore, we explore various artistic effects made possible by time-dependent guiding. | en_US |
| dc.description.number | 2 | en_US |
| dc.description.seriesinformation | Computer Graphics Forum | en_US |
| dc.description.volume | 29 | en_US |
| dc.identifier.doi | 10.1111/j.1467-8659.2009.01640.x | en_US |
| dc.identifier.issn | 1467-8659 | en_US |
| dc.identifier.pages | 705-712 | en_US |
| dc.identifier.uri | https://doi.org/10.1111/j.1467-8659.2009.01640.x | en_US |
| dc.publisher | The Eurographics Association and Blackwell Publishing Ltd | en_US |
| dc.title | Improved Variational Guiding of Smoke Animations | en_US |