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Collaborative CAD Synchronization Based on a Symmetric and Consistent Modeling Procedure

1, 1,2,* and 3
School of Computer, Wuhan University, Wuhan 430072, China
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Division of Ocean Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
Author to whom correspondence should be addressed.
Academic Editor: Saeid Nahavandi
Symmetry 2017, 9(4), 59;
Received: 4 March 2017 / Revised: 11 April 2017 / Accepted: 18 April 2017 / Published: 23 April 2017
PDF [4845 KB, uploaded 24 April 2017]


One basic issue with collaborative computer aided design (Co-CAD) is how to maintain valid and consistent modeling results across all design sites. Moreover, modeling history is important in parametric CAD modeling. Therefore, different from a typical co-editing approach, this paper proposes a novel method for Co-CAD synchronization, in which all Co-CAD sites maintain symmetric and consistent operating procedures. Consequently, the consistency of both modeling results and history can be achieved. In order to generate a valid, unique, and symmetric queue among collaborative sites, a set of correlated mechanisms is presented in this paper. Firstly, the causal relationship of operations is maintained. Secondly, the operation queue is reconstructed for partial concurrency operation, and the concurrent operation can be retrieved. Thirdly, a symmetric, concurrent operation control strategy is proposed to determine the order of operations and resolve possible conflicts. Compared with existing Co-CAD consistency methods, the proposed method is convenient and flexible in supporting collaborative design. The experiment performed based on the collaborative modeling procedure demonstrates the correctness and applicability of this work. View Full-Text
Keywords: collaborative computer aided design (Co-CAD); concurrent control; symmetry; modeling procedure collaborative computer aided design (Co-CAD); concurrent control; symmetry; modeling procedure

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Wu, Y.; He, F.; Han, S. Collaborative CAD Synchronization Based on a Symmetric and Consistent Modeling Procedure. Symmetry 2017, 9, 59.

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