topic Re: Changing splines to polylines in AutoCAD Forum

Changing splines to polylines

jimbir — Sat, 23 Dec 2017 21:32:08 GMT

hi. I'm working with ACAD 2004. I have a spline I would like to convert to a polyline. I've seen numerous posts saying this can be done using the PEDIT command. If I try to follow those instructions, I get a message telling me that what I selected was not a valid polyline.

Can someone tell me how to do this with my antique version of ACAD?

Re: Changing splines to polylines

chriscowgill7373 — Sat, 23 Dec 2017 21:37:10 GMT

do you have express tools? You can flatten a spline and it will convert it. I dont think spline conversion using the polyline command was added until recently

Re: Changing splines to polylines

Alfred.NESWADBA — Sat, 23 Dec 2017 21:48:44 GMT

Hi,

>> I've seen numerous posts saying this can be done using the PEDIT command

Not with AutoCAD 2004.

If my remembering is correct then yo might save your drawing back to DXF12, that converts splines to polylines.

- alfred -

Re: Changing splines to polylines

leeminardi — Sun, 24 Dec 2017 15:36:48 GMT

You can convert a spline to a polyline with the splinedit command. I am not sure if the command is available in 2004. After giving the command input the P option (polyline)and then enter the level of smoothness you want. If the original spline lies on a plane a polyline will be created. If the spline did not lie on a plane you will get a 3dpoly. You can convert a 3dpoly to individual lines with explode.

Re: Changing splines to polylines

maratovich — Sun, 24 Dec 2017 16:01:21 GMT

Copy the spline to a new file .dwg
Save the new file as ... in version AutoCAD R12/LT2 DXF .dxf
Close file .dxf
Open file .dxf
Copy a polyline from a file .dxf to an old file .dwg

Re: Changing splines to polylines

jimbir — Sun, 24 Dec 2017 16:56:57 GMT

I attempted to install express tools using the install disk but it wasn't in the list of features. I can change an arc to a polyline but not an ellipse. An arc doesn't give me the area I need. (I'm laying out an aircraft instrument panel.). I'm going to see see if i can generate an arc that has an area close to half an ellipse. I'll get back with results.

Jim

Re: Changing splines to polylines

jimbir — Sun, 24 Dec 2017 17:03:36 GMT

Thank you Alfred, Leeminardi, Maratovich for the work-arounds. I try them out.

Re: Changing splines to polylines

jimbir — Sun, 24 Dec 2017 17:11:09 GMT

Splinedit does exist in 2004 but the P option isn't one of the options.