offset a polyline

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offset a polyline

Postby dammerel » Sun Dec 02, 2007 2:40 am

Hi guys
if i draw a polyline and not close it (to form a face). is there a way to offset it
see attached example

thanks Andrew

offset.skp
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Re: offset a polyline

Postby Gaieus » Sun Dec 02, 2007 2:41 am

No, it's not possible. What you could do it to make a copy of it and scale it down but then it would be scaled proportionately which means that the distance of corresponding lines (i.e. the wall thickness if this is going to be a hous plan fopr instance) would not be equal.
Why don't you just close the ends (temporarily), do the offset and delete the added edges in both polylines?
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Re: offset a polyline

Postby boofredlay » Sun Dec 02, 2007 2:41 am

Your question is a bit confusing. In your model you point to one line but it seems you want to offset all the lines in your post.
Which is it.

If you want to offset all the lines just select them all and use the offset tool. Click once, move in the offset direction you want and type in the distance.

If you just want to offset one single line just select it, use the move/copy tool, hold down ctl and simply copy the line.
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Re: offset a polyline

Postby Jean Lemire » Sun Dec 02, 2007 2:44 am

Hi folks.

See attached SU file for ideas.

Lines offset.skp
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Jean (Johnny) Lemire from Richelieu, Quebec, Canada.
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Re: offset a polyline

Postby dammerel » Sun Dec 02, 2007 2:45 am

thanks and yes that is how i did it..just wanted to know if there was a better way
thanks guys Andrew
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dammerel 
 

Re: offset a polyline

Postby Edson » Sun Dec 02, 2007 2:45 am

Gaieus wrote:No, it's not possible.

sorry to disagree, gai. as long as the lines are coplanar and connected, they do not need to configure a closed polygon for you to be able to offset them.
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edson mahfuz, architect | porto alegre • brasil
http://www.mahfuz.arq.br
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Re: offset a polyline

Postby Gaieus » Sun Dec 02, 2007 2:46 am

Yeah, you are right.
IF you select all the lines you can offset them. I missed this step (and wanted to try to offset just by hovering over the lines).

This is then the same "trick" that I learnt from Eric: you don't need to select all the edges if you only want to use the Follow me tool around a single face; you can select the face itself.

Here if there is a face (the edges make a closed loop), the Offset tool selects that face automatically. If there is no face, you will need to select the lines themselves.

Thanks for pointing me to the right direction!
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Re: offset a polyline

Postby dammerel » Sun Dec 02, 2007 2:47 am

I found an answer, if you use the weld.rb script then you can offset a open polyline

Andrew
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