Removing Local Surface Irregularities by Modifying Highlight Lines

Highlight lines are well known surface smoothness evaluation tools. This paper explains a method by the application of which the designer is enabled to smooth surface by adjusting directly its highlight lines model. The adjustment of highlight lines is performed by replacing the defective parts -which are the subjects of designer´s choice -with a replacement curve. The control points of the surface patch which produces the modified highlight lines are determined by using a genetic algorithm. The method´s advantages are represented in using better replacement curves and an algorithm which, no matter how complex the replacement curve is, can find modified control points in the absence of algebraic relations.