香港中文大學的孫漢秋老師來訪，將在計算機科學國家重點實驗室做一個報告。
Title: Hybrid Vortex Model for Efficient Diffusive, Turbulent Smoke Simulations
Speaker: Prof. Hanqiu Sun
VR, Visualization & Imaging Research Centre
Dept. of Computer Science & Engineering
The Chinese University of Hong Kong
時間：2015年11月17日下午2：30~4：00
地點：五號樓三層，334報告廳
Abstract
Vortex based simulation methods can produce attractive visual effects, so most
favored to enhance the dynamic smoke simulation. However, using such physical models is
still a challenging task to efficiently and stably reproduce high-quality smoke, as the motion is
influenced by all other vortex elements in the simulation domain in which vortex stretching
and the complex evolution are hard to tackle. In this work, we present the novel hybrid vortex
model that seamlessly fuses the vortex filament and vortex particle in one system to
efficiently simulate stable and scalable dynamic smokes. We first introduce the vortex
filaments in grids scheme, in which the grids dynamically bridge the motion of vortex
filaments and smoke particles for efficient smoke simulation with fine visual effects. We
further work on converting the vortex filament when overly stretched into vortex particles
while maintaining the total circulation, which effectively stabilizes the simulator. We also
realize the parallel processing of hybrid vortex model on the modern GPU, so further
improving the simulation efficiency. The experimental results demonstrated that our hybrid
scheme enables producing the visual plausibility with diffusive and highly turbulent smoke
effects, as well as the flexibility for scale of details and efficient simulation performance.
Biography
Prof. Sun received M.S. in electrical engineering from University of British Columbia,
and Ph.D. in computer science from University of Alberta, Canada. Prof. Sun has published
more than hundred technical papers refereed in VR/CG journals and international conferences,
including MIT Journal of PRESENCE, Journal of Virtual Reality: Research, Development
and Applications, IEEE Transactions on Visualization and Computer Graphics, Computers &
Graphics, IEEE Journal of Computer Graphics and Applications, Computational Geometry,
IEEE Transactions on Information Technology in BioMedicine, Computer Animation and
Virtual Worlds, The Visual Computer, International Journal of Image & Graphics. She has
served as guest editors of MIT PRESENCE, Journal of CAVW and IJIG, program co-chair of
ACM VRST 2002, organization co-chair of Pacific Graphics 2005, CGI 2006, director of
advanced workshop on VR 2007. Her current research interests include virtual reality,
interactive graphics/animation, hypermedia, computer-assisted surgery, mobile image /video
editing and synopsis, Haptics and dynamics simulation.
