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CAD Forums => CAD General => The Third Dimension => Topic started by: Barry Clark on December 14, 2006, 03:45:22 PM

Title: splines and 3d
Post by: Barry Clark on December 14, 2006, 03:45:22 PM

Now, I know I can't extrude a spline... to the best of my knowledge, but I have a drawing that I would like to make a 3d object of with as little fuss as possible. It is made up of splines. Any thoughts on how I can take this object and extude it?

Thanks!

Title: Re: splines and 3d
Post by: daron on December 14, 2006, 04:23:37 PM

Copy over your spline with arcs, join them and extrude the arcs? Sorry, I know it's a lot of fuss, but I can't think of any better way.
P.S., I can't tell what version of CAD you're using and haven't tried the spline idea in 2007 yet.

Title: Re: splines and 3d
Post by: David Hall on December 14, 2006, 04:27:11 PM

What exactly are you trying to do? 

Title: Re: splines and 3d
Post by: MickD on December 14, 2006, 04:28:38 PM

from memory there is a variable setting that says to create splines as poly lines, perhaps you can set this and re-open the drawing and hope it has changed and away you go. Other than that, approximating the spline by tracing it with a polyline would be the simplest answer.

Title: Re: splines and 3d
Post by: SDETERS on December 14, 2006, 05:46:57 PM

Watch how many endpoints your pline has. The more points on the polyline the more little bitty surfaces you will have. 

Title: Re: splines and 3d
Post by: dan19936 on December 14, 2006, 07:50:24 PM

http://dotsoft.com/public/spl2pl.vlx (http://dotsoft.com/public/spl2pl.vlx) will convert splines to plines

Dan

Title: Re: splines and 3d
Post by: Bryco on December 14, 2006, 09:00:53 PM

A closed spline extrudes, Acad 2006, you can also make a region of touching splines and extrude that.

Title: Re: splines and 3d
Post by: DaveW on April 02, 2007, 11:47:05 AM

You can also you use the express tools flatten command. That will make arcs, then just pedit and extrude.

Title: Re: splines and 3d
Post by: Josh Nieman on April 02, 2007, 11:49:41 AM

at least since 2007 splines could be extruded...

what version you on?

Title: Re: splines and 3d
Post by: DaveW on April 02, 2007, 12:32:02 PM

You have always been able to extrude a closed spline or ellipse, as noted above. Acad 2007 allows open splines/ellipses to be extuded and then thickened with the thicken command to create a 3D solid.

Title: Re: splines and 3d
Post by: JDMather on April 02, 2007, 08:17:43 PM

http://home.pct.edu/~jmather/content/CAD238/AutoCAD_2007_Tutorials.htm