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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):

;like HATCHGENERATEBOUNDARY (<2011)
(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)
 (princ)
); end HGB
ACAD
100% *  CAD 
2.4.2015    3533x  
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applies to: AutoCAD ·

See also:
Tip 8396:Ray hatch patterns in AutoCAD.
Tip 8177:How to convert an existing hatch to associative?
Tip 7916:Searching for hatches with missing Area property.
Tip 7648:Area not displayed for some boundaries or hatches.
Tip 6334:How to draw hatches always to back (below other objects)?


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