关键词: 数据变换, Parasolid, STL, 三角网格, 自由曲面, 插值

Abstract: To satisfy data exchange demand between stereo lithography(STL) and Parasolid geometry modeling kernel, on the basis of segmentation for triangular mesh model, the boundary of triangular mesh model was sectioned by using the corner points; feature points were extracted using the approximation midpoint on the border of each section and recursion subdivision algorithm; the shortest paths between two corresponding characteristics points on the corresponding border section were calculated by adopting Dijkstra algorithm to get node data of space square; free-form surfaces of the triangular mesh model were reconstructed by the interpolation method and sewed by using Parasolid functions, and the STL model was transformed into Parasolid files finally. The case study indicated the feasibility and reliability of this model.

Key words: data exchange, Parasolid, stereo lithography, triangular mesh, free-form surface, interpolation