抄録
Surface modelling systems are indispensable tools for designing aesthetic shapes of mechanical products. Contemporary CAD systems provide modelling functions for generating and modifying free form surfaces. They can also perform surface evaluation by rendering surfaces or drawing characteristic curves, such as iso-parametric curves, contour curves, highlight curves. The aim of this research is to propose a new and intuitive surface modification method based on those characteristic curves. With this method, designers can modify surfaces by directly manipulating those characteristic curves. The formalization of the problem is simple, but results in an inverse problem. This problem is solved by applying the standard regularization theory. A computer program is developed to numerically evaluate the method and applied to several examples. It is demonstrated that the method can be used as a basic surface modelling capability.
