计算机图形学是计算机辅助绘图的一种形式，与目前用于系统设计的传统绘图技术相比，它具有几个明显的优点。虽然计算机图形学是一个相对较新的发展，但将计算机辅助绘图技术集成到实际设计项目中已经充分证明了该系统的整体可行性、省时性和经济优势，并且是本文的基础。本文末尾附有使用计算机图形系统完成的图纸样本，以及具有典型设备平面图的计算机图形设备草图。 图1表示使用计算机图形绘制的完整平面图的一部分。这张纸是一份实际的“硬拷贝”打印输出，在平面图的刻字和最终细节之前，在最终状态下，在可清洗聚酯薄膜纸上进行了拍照和复制。其他图纸和草图将在文本中介绍其作用时提及。通过使用计算机图形系统，设计师可以“调用”存储的图形，即通过电传打字机输入图形文件名，从计算机内存库执行检索，从而允许设计师将图形投影到显示器上以供审查，或使用打印机制作显示器的硬拷贝。 图形显示后，设计师可以选择更改比例、快速移动、旋转、镜像、删除或重复显示图形的部分、平移图形、绘制新元素、测量距离和面积、添加新元素、随时在打印机上获取硬拷贝，或将图形存储起来以备将来使用。实际上，就设计师解决设计问题的能力而言，传统绘图和计算机图形学（CG）与P9int之间存在直接的类比。然而，CG系统使用户能够复制、合并和操作图纸，从而在使用传统绘图技术所需的时间内生成许多解决方案。 此外，设计师通常会收到一份新的硬拷贝，而不是一份带有相关缺陷的修订工作图纸。引文:华盛顿州西雅图ASHRAE学报第82卷第2部分研讨会

Computer Graphics is a form of computer-aided drawing which affords several distinct advantages over the present conventional drawing techniques employed for systems design. Although computer graphics is a relatively new development, the integration of computer-aided drawing techniques into an actual design project has adequately proven the overall feasibility, time-saving and economic advantages of the system and is the basis for this paper.Attached at the end of this text are samples of drawings completed using the computer graphics system and also sketches of the computer graphics equipment with a typical equipment plan. Fig. 1 represents a portion of a completed floor plan drawn using computer graphics. This sheet is an actual "hard copy" printout run prior to lettering and final detailing of the floor plan which in the final state was photographed and reproduced on a washable mylar sheet. The other drawings and sketches will be mentioned as their role is presented in the text.By using the computer graphics system, a designer may "call up" a stored drawing, that is, to input the drawing file name through the teletype to execute retrieval from the computer memory bank, thus allowing the designer to project the drawing on the display for review or to make a hard copy of the display with the printer. Once the drawing is displayed, the designer may elect to change scales, rapidly move, rotate, mirror, delete or repeat parts of the displayed drawing, pan over the drawing, draw new elements, measure distances and areas, add new elements, obtain a hard copy at any time on the printer, or store the drawing away for future use. Actually, a direct analogy exists between conventional drawing and computer graphics (CG) to this P9int in terms of what a designer can do to solve a design problem. However, -the CG system enables the user to duplicate, merge and manipUlate drawings to produce many solutions in the time required to do one with conventional drawing techniques. Additionally, the designer is always given a fresh hard copy rather than a revised working drawing with its associated shortcomings.