35-Issue 7

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An Interactive Design System of Free-Formed Bamboo-Copters
(The Eurographics Association and John Wiley & Sons Ltd., 2016) Nakamura, Morihiro; Koyama, Yuki; Sakamoto, Daisuke; Igarashi, Takeo; Eitan Grinspun and Bernd Bickel and Yoshinori Dobashi
We present an interactive design system for designing free-formed bamboo-copters, where novices can easily design freeformed, even asymmetric bamboo-copters that successfully fly. The designed bamboo-copters can be fabricated using digital fabrication equipment, such as a laser cutter. Our system provides two useful functions for facilitating this design activity. First, it visualizes a simulated flight trajectory of the current bamboo-copter design, which is updated in real time during the user's editing. Second, it provides an optimization function that automatically tweaks the current bamboo-copter design such that the spin quality-how stably it spins-and the flight quality-how high and long it flies-are enhanced. To enable these functions, we present non-trivial extensions over existing techniques for designing free-formed model airplanes [UKSI14], including a wing discretization method tailored to free-formed bamboo-copters and an optimization scheme for achieving stable bamboocopters considering both spin and flight qualities.