AutoCAD expert David Cohn takes the constraint talk a little further using tangents, perpendicular lines, parallel lines, concentric circles and arcs, and horizontal constraints on the same objects. You also learn about the common parametric battle of “who changes whom.” Cadalyst and Autodesk blogger Lynn Allen explains the basics of parametric constraint tools and how to use geometric constraints such as parallel and perpendicular lines in AutoCAD. Here are eight AutoCAD tips for parametric modeling. AutoCAD has supported 3D parametric constraints since AutoCAD 2010, but except for 3D power users, most AutoCAD drafters don’t take advantage of this dynamic modeling environment and the accuracy and information it can bring to your drawings.
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