Hi all!

I would like to draw a bunch of thin walled tubes with polygonal cross
section, I know I can do this by offsetting the inner polygon and I can
obtain the walls by difference and extrusion.

But then I need to replicate the difference shape which results in huge
memory and CPU cost. I can do the same thing by drawing the cross section as
a polygon with a hole but I need the vertices and the sides of the outer
polygon generated by offset().

does anyone know if it is possible to get the vertices and the paths
genrated by the offset() function ?

thanks!
Andrea

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alas its not currently possible to get the vertices from any operation.

• Try to do your difference inside a loop might make it faster.
• preparing the outlines in a program like Inkscape (in mm) and then
  exporting using a script like:
  • http://www.thingiverse.com/thing:1065500
    might get you a simpler series of steps.

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many thanks for you message!

I ended up writing a matlab script to generate all the nodes then used
polygon to get the plate with the holes correctly.

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