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CAD tip # 10231:
Question
A
AutoCAD LT does not offer advanced commands for curves nor LISP functions for creating complex geometry. But you can still draw parametric geometric curves in AutoCAD LT. This is how.
First you will need to calculate X/Y or X/Y/Z coordinates of the requested curve - e.g. in Excel and then paste the resulting point list in AutoCAD's PLINE (polyline) command. E.g. for spiral you can use the simplified math expression:
X = r/10 * sin(r) Y = r/10 * cos(r)to generate a logarithmic spiral curve. Prepare an Excel sheet with the following data:
The formatting function for an English Excel is:
=FIXED(B4,9,TRUE)&","&FIXED(C4,9,TRUE)
Then add the "_PLINE" command name, select the resulting column with Ctrl+C and paste it to the AutoCAD command line (not in the drawing window):
LTspiral.xlsx sample file for download (from Czech Excel)
ACLTACAD


9.3.2015
55955×
applies to: AutoCAD LT · AutoCAD ·