This paper provides a systematic approach for copying and pasting of freeform features among existing models of design. Freeform feature as complex high-level shape entity enables a fast creation and modification of a geometric model in the context of both mechanical and aesthetic design. Copying and pasting of freeform feature can enhance not only the rapid shaping of the geometric model itself, but also the inheriting of design knowledge built in existing designs. In this paper definitions of freeform feature are reviewed and consummated. An analysis of parametric and topological relevancy of freeform feature is given in terms of copying operation and an elaboration of the reconstruction of freeform feature in a new geometric model regarding to pasting operation is presented. The reuse of freeform feature is discussed, and related algorithms are presented in detail.

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