Forums >> Revit Building >> Technical Support >> extracting hatch pattern from autocad file

dgtmantis

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Joined: Tue, Jun 1, 2010
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I need to change the scale of a pattern in revit that was imported from a .pat file.  The problem is I have lost the .pat file! 

I have exported the revit file to a dwg and have used the lisp routines PATOUT and GETPAT.  I loaded both of them into autocad and selected the hatches and both of them said they were exracted. 

The problem is that I can't find them anywhere. I assumed they would be in the C: Documents and Settings: User Name: Application Data: Autodesk: AutoCAD 2011: R18.2: enu: Support...but they are not there.  I even checked the default acad.pat file thinking they may have been added to that file but no.

Anyone used these lisps?  Where are the extracted patterns located?

-dgt

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WWHub

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Joined: Tue, May 16, 2006
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Did you try changing the scale in cad, then importing that view into a cleanup revit file to get the pattern at the right scale?

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dgtmantis

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Yup...tried that before I decided to attempt to extract the hatch.  AutoCAD shows the hatch but since there is no definition in .pat format, it cannot change the scale.

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dgtmantis

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OK...Well, I found a workaround.  I downloaded "HatchMaker" and recreated the hatch I had in the autoCAD file.  Not nearly as good as the original hatch that I had lost the .pst file for but I have to take what I can get!

Just in case anyone else has this problem, here is the link to hatchmaker:

http://cadtips.cadalyst.com/patterns/hatch-maker

Thanks!

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itsmyalterego

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Joined: Thu, May 28, 2009
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You can also get the free "hatch22" plugin for revit, which allows you to draw any hatch pattern you desire.  Model hatches, to scale.  I find it incredibly useful, particularly for wood grain, which has always looked exceptionally hokey in all .pat libraries in the history of CAD.

I reccomend keeping a separate project on your network titled 'hatch library/playground" or such.  Draw and test your hatches in there, and then copy/paste a filled region into your actual project. 

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