| The modern package design is realized by means of computer. With the constant development of CAD, the domestic CAD has also made noticeable improvement in the terms of the development and practical account. During the past few years, people successfully developed various CAD systems, during which the majority is the type of carton, while aiming at bottle package is hardly found. However, in the market the bottle package actually possesses quite considerable percentage, so the development of CAD system is bound to be the tendency in the next few years.Based on the reasons, I choose the design of bottle package 3D software as my topic. In order to design the professional CAD software system, the adequate professional analysis is significant. This paper will make an emphatic analysis on the characteristic of both structure and model, as well as the new tendency in the market. First, during the designing process of the software, the OpenGL technology will be applied to meet the needs of the software. Secondly, the frame of PackCAD system is formulated and the corresponding classes and templates are designed by object oriented programming technique. Finally, this system has been implemented on the platform of Visual C++ 6.0. |