Abstract
In this paper the issue of recovering surface curvature from the geometry data imported in the triangulated STL format for effective surface grid generation is described. Mathematical description and procedure to achieve division of a triangular Bezier surface by using patch point idea is given. The key issue in expressing a sub-region of triangular Bezier surface is to find the Barycentric coordinates of patch points of the sub-region. Once the coordinates of those Patch points are found, then the control points which are needed to describe the triangular Bezier surface for the sub-region can be routinely obtained. It is demonstrated that the quality of surface description along a geometry imported in STL format can be improved by using the current method of approximate curvature-recovery, which will eventually improve the accuracy and effectiveness of surface grid generated along the surface imported in STL format.
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