CAD Forum - tips, tricks, discussion and utilities for AutoCAD, Inventor, Revit and other Autodesk products [www.cadforum.cz] ARKANCE | CONTACT - CZ | SK | EN | DE

CAD tip CAD tip # 10884:

Question

CAD 
 %  platform  category 
A
If you to find in your utility or menu-macro whether the current drawing is a 2D or 3D drawing file, or whether it doesn't contain any visual entities, you can use the following simple AutoLISP functions (predicates):

;is current drawing 2D? (defun is2D-p () (and (zerop (caddr (getvar "EXTMIN")))(zerop (caddr (getvar "EXTMAX")))) ; Z-boundingbox = 0? ) ;is current drawing 3D? (defun is3D-p () (< (caddr (getvar "EXTMIN"))(caddr (getvar "EXTMAX"))) ; Z-boundingbox ? ) ;is current drawing visually empty? (vl-load-com) (defun isEmpty-p () (vla-regen (vla-get-activedocument (vlax-get-acad-object)) 1) (> (caddr (getvar "EXTMIN"))(caddr (getvar "EXTMAX"))) ; min>max? )

The functions - e.g. (is2D-p) - return the values of T (true) or nil (false) in AutoCAD.

ACAD
100% *CAD
4.5.2016   9055×  
Comments   Tell a friend
   
this tip shared by ARKANCE experts applies to: AutoCAD ·

See also:
Tip 15090:3DPlot - 3D math surfaces in AutoCAD.
Tip 15089:2DPlot - parametric math curves in AutoCAD.
Tip 14946:Dimensioning the arc length and radius at the same time.
Tip 14650:3D rotation of a DWG object to the target point.
Tip 14477:PurgeAll - automation of DWG file cleaning
Selected tip: How to sketch a square or triangle in Inventor?


Back    All CAD Tips

How to get user's full domain name, phone No., department, e-mail... « | » What is the process acwebbrowser.exe resp. Chromium host executable?


Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above). You may also add a link to your web - like this "fan" link: CAD Forum - tips, utilities, blocks for Autodesk products
CAD: 
OS: 
Categ: 
Text:
 FAQ
  





Please use these tips at your own risk.
ARKANCE is not responsible for possible problems that may occur as a result of using any of these tips.
TOPlist
CADfórum
CADforum
Tips, tricks, utilities, help, how-tos and FAQ for AutoCAD, LT, Inventor, Revit, Map, Civil 3D, Fusion, Forma, 3ds Max and other Autodesk software (community support by ARKANCE). See About CADforum.
Copyright © 2026 | Advertise with us | Online privacy
ARKANCE CZ - Autodesk Platinum Partner & Training Center & Consulting Services Partner
CONTACT:
webmaster.cz@arkance.world | tel. +420 910 970 111
FB LN TW YT TW RSS
.