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GPU-assisted positive mean value coordinates for mesh deformations

Published: 04 July 2007 Publication History

Abstract

In this paper we introduce positive mean value coordinates (PMVC) for mesh deformation. Following the observations of Joshi et al. [JMD*07] we show the advantage of having positive coordinates. The control points of the deformation are the vertices of a "cage" enclosing the deformed mesh. To define positive mean value coordinates for a given vertex, the visible portion of the cage is integrated over a sphere.
Unlike MVC [JSW05], PMVC are computed numerically. We show how the PMVC integral can be efficiently computed with graphics hardware. While the properties of PMVC are similar to those of Harmonic coordinates [JMD*07], the setup time of the PMVC is only of a few seconds for typical meshes with 30K vertices. This speed-up renders the new coordinates practical and easy to use.

References

[1]
{Coq90} Coquillart S.: Extended free-form deformation: a sculpturing tool for 3d geometric modeling. Proceedings of SIGGRAPH '90 (1990), 187--196.
[2]
{FKR05} Floater M. S., Kos G., Reimers M.: Mean value coordinates in 3d. Computer Aided Geometric Design 22, 7 (2005), 623--631.
[3]
{Flo03} Floater M. S.: Mean value coordinates. Computer Aided Geometric Design 20, 1 (2003), 19--27.
[4]
{HF06} Hormann K., Floater M. S.: Mean value coordinates for arbitrary planar polygons. ACM Transactions on Graphics 25, 4 (2006), 1424--1441.
[5]
{JMD*07} Joshi P., Meyer M., DeRose T., Green B., Sanocki T.: Harmonic coordinates for character articulation. Transactions on Graphics 26, 3 (Proc. SIGGRAPH) (2007).
[6]
{JSW05} Ju T., Schaefer S., Warren J.: Mean value coordinates for closed triangular meshes. vol. 24, 3 (Proc. SIGGRAPH), pp. 561--566.
[7]
{SP86} Sederberg T. W., Parry S. R.: Free-form deformation of solid geometric models. Proceedings of SIGGRAPH '86 (1986), 151--160.

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  1. GPU-assisted positive mean value coordinates for mesh deformations

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      cover image ACM Other conferences
      SGP '07: Proceedings of the fifth Eurographics symposium on Geometry processing
      July 2007
      273 pages
      ISBN:9783905673463

      Sponsors

      • EUROGRAPHICS: The European Association for Computer Graphics

      Publisher

      Eurographics Association

      Goslar, Germany

      Publication History

      Published: 04 July 2007

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      SGP '07
      Sponsor:
      • EUROGRAPHICS
      SGP '07: Geometry processing
      July 4 - 6, 2007
      Barcelona, Spain

      Acceptance Rates

      SGP '07 Paper Acceptance Rate 21 of 74 submissions, 28%;
      Overall Acceptance Rate 64 of 240 submissions, 27%

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