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In order to bridge the gap between complex operations and atomic operations in CAD groupware, adapter tools are introduced to decompose complex operations into atomic ones by breaking up the former according to different steps and different objects. However, during the decomposition process, because of the loss of the relationships between the original operations and the atomic ones, the intention...
Two kinds of operations are discovered in CoAutoCAD system: immediate one and step-wise one. The execution of the former (such as Line, Box etc.) is completed in one step while the latter(such as Mirror, Array) takes some continuous or discrete steps and the number of the steps can even not be predicted in some scenarios (such as Copy-Paste). So, during the execution process, the intention of the...
Based on the analysis of the two forms during collaboration of engineering design, which are named as time collaboration and space collaboration, the paper introduces a TDM (total data model) centered framework to support both time and space collaboration of hybrid CAD applications. By separating data and view the framework supports designers' view-wandering between different trades so that they can...
3D virtual worlds facilitate a level of communication and collaboration not readily available in conventional CAD systems. The integration of virtual worlds and CAD systems using a common data model can make a significant impact on synchronous collaboration and real-time multiuser multidisciplinary modification of building data. By using agents, the integration of 3D virtual worlds and CAD systems...
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