Interactive Modeling of Mechanical Objects

Objects with various types of mechanical joints are among the most commonly built. Joints implement a vocabulary of simple constrained motions (kinematic pairs) that can be used to build more complex behaviors. Defining physically correct joint geometry is crucial both for realistic appearance of mo...

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Bibliographic Details
Published in:Computer graphics forum Vol. 35; no. 5; pp. 145 - 155
Main Authors: Ureta, Francisca Gil, Tymms, Chelsea, Zorin, Denis
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.08.2016
Subjects:
Analysis
and systems
Categories and Subject Descriptors (according to ACM CCS)
Computer graphics
Construction
Contact
Design engineering
Geometry
I.3.3 [Computer Graphics]: Computational Geometry and Object Modeling-[Geometric algorithms
I.3.3 [Computer Graphics]: Computational Geometry and Object Modeling—[Geometric algorithms, languages, and systems]
Image processing systems
Interactive
Joint geometry
Kinematics
languages
Modelling
Semantics
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Description
Summary:Objects with various types of mechanical joints are among the most commonly built. Joints implement a vocabulary of simple constrained motions (kinematic pairs) that can be used to build more complex behaviors. Defining physically correct joint geometry is crucial both for realistic appearance of models during motion, as these are typically the only parts of geometry that stay in contact, and for fabrication. Direct design of joint geometry often requires more effort than the design of the rest of the object geometry, as it requires design of components that stay in precise contact, are aligned with other parts, and allow the desired range of motion. We present an interactive system for creating physically realizable joints with user‐controlled appearance. Our system minimizes or, in most cases, completely eliminates the need for the user to manipulate low‐level geometry of joints. This is achieved by automatically inferring a small number of plausible combinations of joint dimensions, placement and orientation from part geometry, with the user making the final high‐level selection based on object semantic. Through user studies, we demonstrate that functional results with a satisfying appearance can be obtained quickly by users with minimal modeling experience, offering a significant improvement in the time required for joint construction, compared to standard modeling approaches.
Bibliography:ArticleID:CGF12971
Supporting InformationSupporting InformationSupporting Information
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.12971