Vinayak, Sundar Murugappan, Cecil Piya, Karthik Ramani
Handy-Potter: Rapid 3D Shape Exploration Through Natural Hand Motions
Proceedings of the ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2012, August 12-15, 2012, Chicago, Illinois, USA

Winner of the “All-Conference Best paper of ASME IDETC/CIE 2012” award

Abstract: We present the paradigm of natural and exploratory shape modeling by introducing novel 3D interactions for creating, modifying and manipulating 3D shapes using arms and hands. Though current design tools provide complex modeling functionality, they remain non-intuitive and require significant training since they segregate 3D shapes into hierarchical 2D inputs, thus binding the user to stringent procedural steps and making modifications cumbersome. In addition the designer knows what to design when they go to CAD systems and the creative exploration in design is lost. We present a shape creation paradigm as an exploration of creative imagination and externalization of shapes, particularly in the early phases of design. We integrate the capability of humans to express 3D shapes via hand-arm motions with traditional sweep surface representation to demonstrate rapid exploration of a rich variety of fairly complex 3D shapes. We track the skeleton of users using the depth data provided by low cost depth sensing camera (Kinect). Our modeling tool is configurable to provide a variety of implicit constraints for shape symmetry and resolution based on the position, orientation and speed of the arms. Intuitive strategies for coarse and fine shape modifications are also proposed. We conclusively demonstrate the creation of a wide variety of product concepts and show an average modeling time of a only few seconds while retaining the intuitiveness of communicating the design intent.

About Vinayak

Vinayak is a PhD candidate in the School of Mechanical Engineering at Purdue University. He is pursuing his dissertation research at the C Design Lab since Spring 2011. His research involves the design, development, and evaluation of spatial (mid-air) user interfaces and interactions for 3D shape conceptualization. Using depth sensors, he has developed and evaluated computational frameworks that use hand gestures and arm motions to create, modify and manipulate 3D shapes in virtual space. Currently, he is working on geometric algorithms to determine human expression of design intent from hand grasp and finger movements for shape deformation.

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Posted in 2012, Cecil Piya, HUMAN SHAPE INTERACTION, Karthik Ramani, Mid-air Interaction, Publications, Vinayak