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Removing extra vertices in OpenStudio

asked 2015-03-26 13:49:17 -0600

updated 2015-03-26 13:52:00 -0600

In a classic case where a surface that can be completely defined by x vertices is actually defined with x+1 vertices, EnergyPlus throws a warning and drops the extra vertex:

   ** Warning ** GetVertices: Distance between two vertices < .01, possibly coincident. for Surface=7A4912D16DF6446A9238, in Zone=1-LEFT-CORRIDOR
   **   ~~~   ** Vertex [2]=(45.27,140.25,0.00)
   **   ~~~   ** Vertex [1]=(45.28,140.25,0.00)
   **   ~~~   ** Dropping Vertex [2].

These warnings clutter my error file and distract me from the real stuff.

So, is there any script out there to just strip them out of the OSM file? If there's one for pure IDF format I'll take it too!

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answered 2015-03-26 13:55:00 -0600

updated 2015-03-26 13:55:21 -0600

You might try using something like this in a measure:

surface.setVertices(OpenStudio::removeCollinear(surface.vertices))

Here is declaration of OpenStudio::removeCollinear

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Is there a way to call that directly from Sketchup?

Julien Marrec gravatar image Julien Marrec  ( 2015-03-26 14:05:57 -0600 )edit

@macumber, slow your roll!

__AmirRoth__ gravatar image __AmirRoth__  ( 2015-03-26 14:13:19 -0600 )edit

You can open the Ruby console and type this bad boy:

OpenStudio::Plugin.model_manager.model_interface.openstudio_model.getSurfaces.each {|s| s.setVertices(OpenStudio::removeCollinear(s.vertices))}

Hopefully that will not crash SketchUp :-) And to be clear it would be much better to do that in a measure ;-)

macumber gravatar image macumber  ( 2015-03-26 14:54:07 -0600 )edit

Thanks! Could you explain briefly would it be so much better in a measure? I'm new to OS, so my natural instinct would be to remove mistakes once and for all and not have to do it each time (though I'm starting to think that those types of problems just arise out of nowhere)

Julien Marrec gravatar image Julien Marrec  ( 2015-03-26 15:27:20 -0600 )edit

If you use the Apply Measures Now function in the OpenStudio Application it will remove the errors once and for all. Putting your code in a measure requires a bit more overhead (just dealing with all the boiler plate stuff) but it will make it easier to run using the application, PAT, Analysis Spreadsheet on any model you want. Plus running code directly in the Ruby console is likely to crash the plug-in, I don't generally recommend it, measures are more repeatable and running in the application won't cause bad interactions with SketchUp.

macumber gravatar image macumber  ( 2015-03-26 16:52:29 -0600 )edit

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Asked: 2015-03-26 13:49:17 -0600

Seen: 292 times

Last updated: Mar 26 '15