AutoCAD® 2012 FOR DUMMIES®

22

From Drawings … to Models

In This Chapter

• Escaping from the XY plane
• Understanding 3D pros and cons
• Setting up a 3D working environment
• Creating 3D solid geometry
• Editing 3D models

For millennia, people have documented the design and construction of three-dimensional objects by drawing two-dimensional views of them. Most people have continued to use these “classical” methods with CAD drafting because the methods are well understood and work reasonably well. After all, if 2D drawing was good enough for guys like Leonardo da Vinci and Andrea Palladio, it should be good enough for us, right?

Nonetheless, for the last decade or so, there's been a trend toward creating 3D CAD models and letting the software generate the 2D views more-or-less automatically. This approach seems more logical, especially if the project documentation requires numerous, complex views of the same object. 3D modeling also is an absolute necessity when you want to create rendered views for presentation purposes.

While the AutoCAD's 3D construction and visualization tools have improved dramatically over the years (trust me — you should have seen what they were like as recently as AutoCAD 2006!), it's still a complex process that requires sophistication on the part of the AutoCAD user. Although 3D modeling requires only one more dimension than 2D drafting, developing 3D CAD models is considerably more complicated. ...