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CAD tip CAD tip # 10269:

Question CAD 
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Q - question

How to restore erased hatch boundaries? (multiple)

A - answer You can use the AutoCAD command HATCHGENERATEBOUNDARY to batch-edit multiple hatches and restore their (previously deleted) boundary curves in one go. This command is available since version 2011.

For older versions or possible customizations of the boundary-restore procedure you can also use the following LISP utility defining the new custom command HGB (save it as .LSP):

(defun C:HGB ( / ss len n ename oosm ocmd)
 (setq ss (ssget '((0 . "HATCH"))))
 (setq len (sslength ss)  n 0)
 (setq oosm (getvar "osmode") ocmd getvar "cmdecho"))
 (setvar "osmode" 0) (setvar "cmdecho" 0)
 (while (< n len)
  (setq ename (ssname ss n))
  (command "_HATCHEDIT" ename "_B" "" "_Y")
  (setq n (1+ n))
 (setvar "osmode" oosm) (setvar "cmdecho" ocmd)
 (sssetfirst ss ss)
); end HGB
100% *  CAD 
2.4.2015    8068×  
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applies to: AutoCAD ·

See also:
Tip 13590:How to set the hatch background color?
Tip 13150:How to hatch selected objects including overlays and islands?
Tip 12966:TrimArr - trim a dynamic array to a boundary curve.
Tip 12766:Lines with a single grip, incorrect osnaps, intersections, offsets, hatches - CheckLarge
Tip 12287:AutoCAD hatch flood-fill does not honor all boundaries.

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