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Consistency maintenance is one of the most important problems in collaborative CAD systems. However, existing consistency maintenance mechanisms limit multi-user interaction. This paper presents a consistency maintenance method to gain a less-constrained multi-user interaction. First, the causal relation between modeling operations is preserved using the state vector. Then, the concurrent deletion...
One difference between real-time CSCW systems and traditional distributed systems is that the former one needs to provide a natural, free and fast interface for multi-user interaction. However, typical multi-user interaction methods in 3D CAD systems apply strict consistency maintenance, such as lock mechanism and floor control which result in a stagnant and unnatural interface. This article proposes...
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