Paul Kilgo
ABSTRACT
Particles offer a convenient way of modeling fluid simulations, but ultimately the goal in photorealistic VFX is to extract a surface representing the fluid which looks true-to-life. A characteristic of dynamic fluid simulations is thin fluid sheets which are challenging to extract a surface from. Bumpy artifacts are frequently exposed in these features. Anisotropic smoothing kernels [Yu and Turk 2013] are a method to combat this, but they also present their own usability challenges. Similar ideas have been used before in the film industry [Museth et al. 2007].
This paper extends the anisotropic kernels technique to provide an automatic scaling correction feature so artists may work in normalized terms. We also use a metaball implicit function over smoothed-particle hydrodynamics (SPH) kernels to achieve smooth surfaces. With these extensions, artists can quickly create high quality surfaces with fewer particles.
Supplemental Material
Available for Download
- Matthias Müller, David Charypar, and Markus Gross. 2003. Particle-Based Fluid Simulation for Interactive Applications. In Proceedings of the 2003 ACM SIGGRAPH/Eurographics Symposium on Computer Animation (San Diego, California) (SCA ’03). Eurographics Association, Goslar, DEU, 154–159.Google Scholar
Digital Library
- Ken Museth. 2013. VDB: High-Resolution Sparse Volumes with Dynamic Topology. ACM Trans. Graph. 32, 3, Article 27 (Jul 2013), 22 pages. https://doi.org/10.1145/2487228.2487235Google ScholarDigital Library
- Ken Museth, Michael Clive, and Nafees Bin Zafar. 2007. Blobtacular: Surfacing Particle System in ”Pirates of the Caribbean 3”. In ACM SIGGRAPH 2007 Sketches (San Diego, California) (SIGGRAPH ’07). Association for Computing Machinery, New York, NY, USA, 20–es. https://doi.org/10.1145/1278780.1278804Google ScholarDigital Library
- SideFX. 2022. Copying and instancing point attributes. https://www.sidefx.com/docs/houdini/copy/instanceattrs. (Accessed on 01/25/2022).Google Scholar
- Jihun Yu and Greg Turk. 2013. Reconstructing Surfaces of Particle-Based Fluids Using Anisotropic Kernels. ACM Trans. Graph. 32, 1, Article 5 (Feb 2013), 12 pages. https://doi.org/10.1145/2421636.2421641Google ScholarDigital Library
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