# Unfold a polyline

Does anyone have/know of a routine/method to unfold a polyline comprising both straight and curved segments?
Any help appreciated.
Cheers
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?

<% if( /^image/.test(type) ){ %>
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Are you talking about flat patterns?
Bob
<% if( /^image/.test(type) ){ %>
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I sure wish there was one, it would make development of 3d objects into flat patterns for cutting very easy. Id be very interested to know if you find a way of doing this, but Ive never seen or heard of it
Shaun

<% if( /^image/.test(type) ){ %>
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wrote:

I've seen things for unwraping solids for pattern cutting - and some of them are very good. In a way, my problem is simpler. I just want to produce a straight line of the same overall length as my polyline, and - crucially - with 'endpoints' in the same relative positions along the line. This can be done manually, by exploding the line and then listing the length of each segment - whether straight or curved, but that's going to be a little tedious for this particular polyline!
Perhaps the solution is to try making a surface from the line and then browse around for some pattern forming software - I'll give that a go.
Once again, any other thoughts appreciated.
<% if( /^image/.test(type) ){ %>
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Um... LIST the polyline to get its "perimeter" and then simply draw a line of that length? Although I'm not sure what you mean by "keeping the endpoints in the same relagive positions..."
___

<% if( /^image/.test(type) ){ %>
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I'm pretty sure preservation of segment length is what's meant...
--

MichaelB
www.michaelbulatovich.ca
<% if( /^image/.test(type) ){ %>
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Michael Bulatovich wrote:

That's right. I believe they're referred to as endpoints in the osnap settings.
<% if( /^image/.test(type) ){ %>
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Yes, that's right - the end vertices of segments are referred to as 'endpoints' in the osnap settings.
<% if( /^image/.test(type) ){ %>
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People trying to cut material seem to want this kind of routine....I'd be surprised if one doesn't exist...it wouldn't be that hard to write... IOW: even I could do it ; )
<% if( /^image/.test(type) ){ %>
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Michael Bulatovich wrote:

It's exactly that kind of thinking that prompted me to write to the NG in the first place ;-)
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