Abstract
Recently, CAD system has spread widely to streamline the product designing process. But its operation is too complex for designers and this obstructs further promotion of efficiency. This study is focusing on the phase of surface evaluation. Surfaces are evaluated by the pattern of highlight lines. When the desired pattern is not obtained, surface is modified by operators. To make this phase more efficient, surface refining system which is more usable for designers is proposed. The system re-constructs smooth surface which shows the required highlight lines entered intuitively by mouse or pen tablet devises.
