期刊
COMPUTER-AIDED DESIGN
卷 69, 期 -, 页码 11-24出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cad.2015.06.006
关键词
Hand-based shape modeling; Mid-air interactions; Virtual pottery; Gestures; Natural user interfaces; Mesh deformation
资金
- National Science Foundation-AIR [1312167]
- National Science Foundation from CMMI-EDI [1235232]
- National Science Foundation from CPS:Synergy [1329979]
- Donald W. Feddersen Chair Professorship at the School of Mechanical Engineering
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1312167] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1235232] Funding Source: National Science Foundation
The advent of depth cameras has enabled mid-air interactions for shape modeling with bare hands. Typically, these interactions employ a finite set of pre-defined hand gestures to allow users to specify modeling operations in virtual space. However, human interactions in real world shaping processes (such as pottery or sculpting) are complex, iterative, and continuous. In this paper, we show that the expression of user intent in shaping processes can be derived from the geometry of contact between the hand and the manipulated object. Specifically, we describe the design and evaluation of a geometric interaction technique for bare-hand mid-air virtual pottery. We model the shaping of a pot as a gradual and progressive convergence of the pot's profile to the shape of the user's hand represented as a point-cloud (PCL). Thus, a user does not need to learn, know, or remember any gestures to interact with our system. Our choice of pottery simplifies the geometric representation, allowing us to systematically study how users use their hands and fingers to express the intent of deformation during a shaping process. Our evaluations demonstrate that it is possible to enable users to express their intent for shape deformation without the need for a fixed set of gestures for clutching and deforming a shape. (C) 2015 Elsevier Ltd. All rights reserved.
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