Removing local irregularities of NURBS surfaces by modifying highlight lines

The highlight line model is a powerful tool in assessing the quality of a s urface. A method to remove local irregularities of NURBS surface by modifyi ng its highlight lines is presented. The method is intuitive and suitable f or real-time interactive design. It allows a designer to remove local irreg ularities of a NURBS surface by a simple operation to smooth the highlight lines. Modification of the control points of the surface is achieved by sol ving a system of linear equations. Test results are included. (C) 1998 Else vier Science Ltd. All rights reserved.