Interactive Editing of Deformable Simulations
ACM SIGGRAPH 2012

People Jernej Barbič University of Southern California Funshing Sin University of Southern California Eitan Grinspun Columbia University

Project material

• Paper (PDF; 2 Mb)
• Supp PDF: M^-1 norm and Equation 2 (0.1 Mb)
• Main video
  (MPEG-4 H.264; 70 Mb)
• Supp videos:
  Complete bridge (72 Mb)
  Complete curtain+beam (33 Mb)
  Complete seagull (73 Mb)
  Complete dragon (41 Mb)
  Bridge with water contact and seagulls (19 Mb)
• Conference presentation slides (Powerpoint PPT, 8 Mb)

Citation

• Jernej Barbič, Funshing Sin, Eitan Grinspun:
  Interactive Editing of Deformable Simulations, ACM Transactions on Graphics 31(4) (SIGGRAPH 2012), Aug 2012. BIBTEX

Abstract

We present an interactive animation editor for complex deformable object animations. Given an existing animation, the artist directly manipulates the deformable body at any time frame, and the surrounding animation immediately adjusts in response. The automatic adjustments are designed to respect physics, preserve detail in both the input motion and geometry, respect prescribed bilateral contact constraints, and controllably and smoothly decay in spacetime. While the utility of interactive editing for rigid body and articulated figure animations is widely recognized, a corresponding approach to deformable bodies has not been technically feasible before. We achieve interactive rates by combining spacetime model reduction, rotation-strain coordinate warping, linearized elasticity, and direct manipulation. This direct editing tool can serve the final stages of animation production, which often call for detailed, direct adjustments that are otherwise tedious to realize by re-simulation or frame-by-frame editing.

Funding

• NSF (CAREER-53-4509-6600, IIS-11-17257, IIS-10-48948, IIS-09-16129, CCF-06-43268)
• James H. Zumberge Research and Innovation Fund at the Office of the Provost at USC
• Sloan Foundation Fellowship to Eitan Grinspun
• Generous gifts from Adobe, Autodesk, Intel, and The Walt Disney Company

Comments, questions to Jernej Barbič.

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