Journal of Computational Design and Engineering

  • 제1권2호
  • /
  • Pages.103-115
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  • 2014
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  • 2288-4300(pISSN)
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  • 2288-5048(eISSN)
한국CDE학회 (Society for Computational Design and Engineering)
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A multi-user selective undo/redo approach for collaborative CAD systems

  • Cheng, Yuan (School of Computer Science and Technology, Wuhan University) ;
  • He, Fazhi (School of Computer Science and Technology, Wuhan University) ;
  • Xu, Bin (School of Computer Science and Technology, Wuhan University) ;
  • Han, Soonhung (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Cai, Xiantao (School of Computer Science and Technology, Wuhan University) ;
  • Chen, Yilin (School of Computer Science and Technology, Wuhan University)
  • 투고 : 2013.09.16
  • 심사 : 2013.11.01
  • 발행 : 2014.04.01
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초록

The engineering design process is a creative process, and the designers must repeatedly apply Undo/Redo operations to modify CAD models to explore new solutions. Undo/Redo has become one of most important functions in interactive graphics and CAD systems. Undo/Redo in a collaborative CAD system is also very helpful for collaborative awareness among a group of cooperative designers to eliminate misunderstanding and to recover from design error. However, Undo/Redo in a collaborative CAD system is much more complicated. This is because a single erroneous operation is propagated to other remote sites, and operations are interleaved at different sites. This paper presents a multi-user selective Undo/Redo approach in full distributed collaborative CAD systems. We use site ID and State Vectors to locate the Undo/Redo target at each site. By analyzing the composition of the complex CAD model, a tree-like structure called Feature Combination Hierarchy is presented to describe the decomposition of a CAD model. Based on this structure, the dependency relationship among features is clarified. B-Rep re-evaluation is simplified with the assistance of the Feature Combination Hierarchy. It can be proven that the proposed Undo/Redo approach satisfies the intention preservation and consistency maintenance correctness criteria for collaborative systems.

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참고문헌

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피인용 문헌

  1. Detecting local undo conflicts in multi-user CAD vol.13, pp.6, 2016, https://doi.org/10.1080/16864360.2016.1168217