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OpenStudio adding random diagonal lines from windows on building

asked 2022-09-21 18:06:44 -0500

Charlotte123's avatar


I have a created a model of a residential building in OpenStudio. The building has several windows of varying sizes. For some reason, after creating the windows on the model, OpenStudio has added random diagonal lines coming off the corner of a few of the windows. I have tried removing and then readding those specific windows and it looked like it had solved the issue but when I reopened the model a few days later, the diagonal lines had reappeared.

I cannot seem to upload an image of the lines on the model for some reason sorry. The diagonal line starts in the corner of a window and then extends to reach the edge of the surface it is on.

Could I please have some help with removing these diagonal lines?


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answered 2022-10-01 07:54:53 -0500

I believe these are simply ThreeJS artefacts - annoying, yet benign. This would not (or should not) add additional vertices to the OSM. Are you seeing them pop up with other renderers (e.g. SketchUp plugin)? Below are OpenStudio App vs SketchUp plugin views of the US DOE SmallOffice Benchmark.


Are you otherwise noticing related warnings/errors in eplusout.err?

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Thanks for your help, I haven't been using SketchUp so unsure if they show up there but if they are just benign artefacts then that should be fine. I haven't noticed any related warnings in eplusout.err either.

Charlotte123's avatar Charlotte123  ( 2022-10-01 17:21:44 -0500 )edit

I don't know if this contributes to the understanding of this issue, but did you notice that separate surfaces/subsurfaces were created as a result of those artifacts? I notice that when I create a space adjacent to another in FloorspaceJS and then delete one of those space, that the adjacent space inherits surface separation artifacts aligned with where the deleted space wall stopped. This little bug added surfaces to my model but did not effect the simulation in any other way.

IanVG's avatar IanVG  ( 2022-10-05 08:40:07 -0500 )edit

There are differences when comparing v3.4 copies of an original (e.g. SmallOffice) .osm file (a first copy saved from within the App, then a second copy saved from within the SU Plugin): e.g. LOTs of differences in rendering colours/groups, a few items like an added default weather file, ... yet I see no differences when it comes to sub/surface objects (i.e. same number of objects, same handles, same number of vertices ... although SU may generate negligible rounding errors for some vertex coordinates). Maybe the differences you're noting are (strictly?) linked to FloorspaceJS.

Denis Bourgeois's avatar Denis Bourgeois  ( 2022-10-05 13:28:52 -0500 )edit

Yes, I think the difference I am noticing is due to the inherent jankiness of FloorespaceJS, although it tends to work fairly well.

IanVG's avatar IanVG  ( 2022-10-06 08:16:35 -0500 )edit

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Asked: 2022-09-21 18:06:44 -0500

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Last updated: Oct 01 '22