Motion-guided mechanical toy modeling

  • Authors:
  • Lifeng Zhu;Weiwei Xu;John Snyder;Yang Liu;Guoping Wang;Baining Guo

  • Affiliations:
  • Peking University;Hangzhou Normal University and Microsoft Research Asia;Microsoft Research;Microsoft Research Asia;Peking University;Microsoft Research Asia

  • Venue:
  • ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2012
  • Year:
  • 2012

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Abstract

We introduce a new method to synthesize mechanical toys solely from the motion of their features. The designer specifies the geometry and a time-varying rotation and translation of each rigid feature component. Our algorithm automatically generates a mechanism assembly located in a box below the feature base that produces the specified motion. Parts in the assembly are selected from a parameterized set including belt-pulleys, gears, crank-sliders, quick-returns, and various cams (snail, ellipse, and double-ellipse). Positions and parameters for these parts are optimized to generate the specified motion, minimize a simple measure of complexity, and yield a well-distributed layout of parts over the driving axes. Our solution uses a special initialization procedure followed by simulated annealing to efficiently search the complex configuration space for an optimal assembly.