The Researching And Programming Of The Objects Oriented CAD System For Space-Grid Structures

In this paper the programming method and realization process ofObjects-Oriented CAD system for the Space-Grid Structures onpersonal computer is been presented. The functions of SGSCADsystem include strfucture modeling,graph handling,structure analysis,drawing making,document organizing,3D showing. This systemsimplifies the programming and maintenance making use of thesucceeding,envelopment and polymorphism of Objects-Oriented.This system utilizes the advanced technique of OLE,ActiveXcontrols,3D-graph library of OpenGL etc. It has many advantagessuch as good interface,brief operation,full function,general,goodefficiency and so on.In short,the SGSCAD system is a successful application to theCAD for civil engineering about Objects-Oriented.