Dimension length of curve 2

[fpolito]

Hello:

I would like to know if it is possible to dimension the length of a curve in AutoCad, for example, 1/4 of the circumference of a circle.

It is possible in other CAD programs, but I cannot seem to accomplish it in AutoCad.

Thank You

 

[IFRs]

Try this (it's crude but it works). Save it as a lsp file like "DimArc.lsp" then load it in AutoCad using the Tools menu or (Load"DimArc&quot on the command line, then run it by typing DimArc on the command line.
;
(DEFUN CimArc (/ p1 p2 p3 p4 om ang rad arc ark) ; Dimension an arc
(SetVar "CMDECHO" 0)
(Setq om (GetVar "OSMODE&quot)
(setq p1 (getpoint "\nSnap to first point (must be on the arc also): &quot
p2 (getpoint "\nSnap to second point (does not have to be on the mark): &quot
)
(COMMAND "Osnap" "CEN&quot
(setq p4 (getpoint "\nPick a point on the connecting arc: &quot)
(COMMAND "Osnap" "NON&quot
(setq p3 (getpoint "\nPoint to dimension location: &quot
ang ( - (angle p4 p1) (angle p4 p2))
rad ( distance p4 p1)
arc ( abs (* rad ang ))
ark (rtos arc)
)
(COMMAND "DIM1" "ANG" "" P4 P1 P2 P3 ARK P3)
(COMMAND "DIM1" "HOM" "L" "&quot
(COMMAND "DIM1" "TE" "L" PAUSE)
(SetVar "OSMODE" om)
(princ)
)
;

 

[fpolito]

Thank you very much, it works great!

They should add it to AutoCad's dimension function.

 

[Hawkeye2]

See this forum for more options:

http://theswamp.org/phpBB2/viewtopic.php?t=446