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CAD tip CAD tip # 4170:

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Q - question

What is the difference between the (command) and (vl-cmdf) LISP functions?

A - answer These AutoCAD-command-invoking functions are almost identical. The newer (vl-cmdf) VisualLISP function verifies the parameters passed to AutoCAD and invokes the command only if the arguments are valid.

Compare e.g.:

(setq p (getpoint))
(vl-cmdf "_ID" p)
(vl-cmdf "_ID" "dummy")
(command "_ID" "dummy")
(vl-cmdf) returns T if the command was invoked successfully (nil otherwise).
ACAD
100% *  CAD 
17.12.2004    9051×  
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applies to: AutoCAD ·

See also:
Tip 11780:How to rename layouts by a specific attribute of the title block?
Tip 11751:toMulti converts polylines to multi-lines driven by a definition table.
Tip 11726:Loading 3D models in the OBJ file format to AutoCAD.
Tip 11714:How to assign a RAL color to a DWG object and get its ACI equivalent?
Tip 11693:Adding numbers in drawing texts.


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