Animated Mesh Approximation With Sphere-Meshes

Jean-Marc Thiery, Emilie Guy, Tamy Boubekeur, Elmar Eisemann
ACM Transactions on Graphics (presented at SIGGRAPH 2016)



Performance capture systems can be used to acquire high-quality animated 3D surfaces, usually in form of a dense 3D triangle mesh. Extracting a more compact, yet faithful representation is often desirable, but existing solutions for animated sequences are surface-based, which leads to a limited approximation power in the case of extreme simplification. We introduce animated sphere-meshes, which are meshes indexing a set of animated spheres. Our solution is the first to output an animated volumetric structure to approximate animated 3D surfaces and optimizes for the sphere approximation, connectivity, and temporal coherence. The result of our algorithm is a multi-resolution structure from which the user can choose the wanted level of simplification in real-time. We demonstrate the use of animated sphere-meshes for low-cost approximate collision detection. Additionally, we propose a skinning decomposition, which automatically rigs the input mesh to the chosen level of detail. The resulting set of weights are smooth, compress the animation, and enable easy edits.



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Related Work

Sphere-Meshes: Shape Approximation using Spherical Quadric Error Metrics
Jean-Marc Thiery, Emilie Guy and Tamy Boubekeur
ACM Transaction on Graphics 32(6), Art. 178 (Proc. SIGGRAPH Asia), 2013


 author = {Thiery, Jean-Marc and Guy, \'{E}milie and Boubekeur, Tamy and Eisemann, Elmar},
 title = {Animated Mesh Approximation With Sphere-Meshes},
 journal = {ACM Trans. Graph.},
 issue_date = {May 2016},
 volume = {35},
 number = {3},
 month = may,
 year = {2016},
 issn = {0730-0301},
 pages = {30:1--30:13},
 articleno = {30},
 numpages = {13},
 url = {},
 doi = {10.1145/2898350},
 acmid = {2898350},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {Animated shape approximation, abstraction, simplification},