Descriptive Geometry Why do I need to understand it With the advent of CAD software,computers are routinely being used to design and illustrate many projects which were formerly hand drawn.This (relatively)new technology eliminates the need for hand completed drawings but still requires the engineer(or artist)to be well versed in the theory and practice of multiview(or orthographic projection) 3-D Spatial visualization is a very powerful tool Shanghai Jiao Tong University 4Shanghai Jiao Tong University 4 Descriptive Geometry n Why do I need to understand it ? n With the advent of CAD software, computers are routinely being used to design and illustrate many projects which were formerly hand drawn. This (relatively) new technology eliminates the need for hand completed drawings but still requires the engineer (or artist) to be well versed in the theory and practice of multiview (or orthographic projection) n 3-D Spatial visualization is a very powerful tool