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Help with DoubleOffset lisp - LeeMac Code

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PM:
I want ro ask you some thing else . Is it possible after the offset to fillet 0 all this lines in ROOF layer?

BIGAL:
It would be better to make all the joining lines to plines use pedit Join, then run the offset lisp it will auto fillet then.

PM:
Hi Bigal. I use this code to make roof. I did a combination with Tharwat code. My results is in the attach file. I want to trim -extend the offset lines to perimetric roof polylime  and fill with ANSI31 hatch like the attach file.

PM:
The ROOF dwg  updated in the previous post

BIGAL:
I think the ridge tops can be filleted by using a circle approach, and checking for a intersectwith, not sure can be automated, may look at making a circle on each end of red lines. The same with eave end it will be a trim or extend. Will have a think about it.

polygon
get co-ord
(setq ss (ssget "F" co-ord '((8 . "ROOF")(0 . "LINE"))))
need to do a distanceatpoint along the polygon via  intersectwith so can sort the line order into pairs then can fillet

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