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CAD tip CAD tip # 6832:

Question CAD 
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Q - question

Change your rectangle to a true rectangle.

A - answer With a single AutoCAD command you can change rectangles drawn with the command RECTANGLE to true rectangles, which also behave like rectangles.

Compare the following two animations - they illustrate the behaviour of two similar objects. The first one is a normal rectangle created using the standard AutoCAD command. The second one is a true rectangle ("rectangle on steroids" if you want), which also behaves like a rectangle during grip-editing and other AutoCAD editing operations.

Standard rectangle (polyline)

True rectangle (constrained polyline)

So how to get a true rectangle from a standard rectangular polyline (pline)? Just a single "magic" command is enough: AUTOCONSTRAIN. With this command you will add automatic geometric constraints to the selected object - and these constraints will be then kept also during editing.

So you can e.g. add a new command for drawing rectangles to your AutoCAD command set (to the ribbon, toolbars, etc.) - use CUI and the following menu macro:

This new command will directly create the "true" rectangles. Such rectangles will behave like rectangles even in AutoCAD LT 2010 (and higher), which itself cannot create such kind of constrained objects.

You can suppress displaying the constraint bars by setting the CONSTRAINTBARMODE variable to 0.

100% *  CAD 
31.7.2009    17000×  

See also:
Tip 13788:Green square - mathematical charade and parametric constraints in AutoCAD.
Tip 13185:Constraining object movement to a specified curve (rail) in AutoCAD.
Tip 12961:Bolt-nut constraint/joint in Fusion 360.
Tip 12856:How to force Inventor holes in existing points only?
Tip 12762:Multiline and vertical text in Fusion 360 sketches.

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