Implementation of Geometric Modelling System: HICAD

Abstract

The geometric modelling defines a figure to a computer with structural descriptions. It is connotatively a technique of graphical operation, and denotatively a method to define figures in CAD/CAM technology. The structural description is to give a basic expression of a figure, and to define the internal expression which refers to the external figure. In order to accomplish this systematical approach, the structural description has to be systematically existed in computer, and the established system is so called geometric modelling system or geometric modeller. It is obvious that the process of CAD/CAM and graphical operation will be subjected to a modeller also whether a successful result is confirmed or not. It is why a modeller becomes such important to be considered. The first, it has difficulties to work on a system development for the present Neumann Computer. The difficulties are induced from the character of the machine that it recognizes objects in blind. Seconderly, it is almost impossible to consider most problems without knowing of the figure of the object in CAD/CAM (or applied numerical analysis). It is reasonable way to think that the application of computer is depended upon to obtain the efficient internal expression of the objected figure on the drafting procedures, the analyses of the performance, and the informating procedures for N.C. formulation, since our products exists on three—dimensional space.