Armory: Faces Not Triangulated on Export

[taholmes160]

(drag & drop zipped .blend file here)
I am working on an arch viz project, and when I cut a hole in the roof of the structure, it does not show in the armory player. The hole was cut with a boolean --- the cutter is hovering above the model in the .blend file
Roof After Boolean.zip

This is the workspace view

This is a quick EEVEE render of it

Finally is a screenshot of the Armory Player

The exact same thing happens when the hole is cut with a set of loops.

I'd be glad to submit anything else that is needed as well -- please let me know

Tim

[Bugsbane]

As mentioned on this forum post this was just an issue with Armory not liking Ngons being used. When the mesh was triangulated, it works fine.

That said, if Blender can handle ngons and Armory can't, then we should really automatically apply a triangulate modifier to all ngons in a scene before compiling to fix these kinds of bugs.

[zicklag]

I'm pretty sure that Armory is supposed to triangulate the faces automatically on export, so I think this still counts as a bug, but we should rename the issue something like "Faces not triangulated on export".

[taholmes160]

Is that something the system will handle, or do I need to rename it?

Tim

On Mon, Mar 11, 2019 at 12:28 PM Zicklag [e-mail] wrote:

I'm pretty sure that Armory is supposed to triangulate the faces
automatically on export, so I think this still counts as a bug, but we
should rename the issue something like "Faces not triangulated on export".

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[zicklag]

@taholmes160 You'll need to rename it.

[taholmes160]

Done

[BlackGoku36]

@luboslenco Where is this automatic triangulate on export code? I would like to check it out and see if i can fix it

[luboslenco]

@BlackGoku36 sounds good, the export code is located at:
https://github.com/armory3d/armory/blob/master/blender/arm/exporter.py#L952

Maybe helpful related issues:
https://github.com/armory3d/armory/issues/1148 https://github.com/armory3d/armory/issues/855

[XQDD]

Well

same after triangulate

main.zip

[luboslenco]

Your issue appears to be caused by inconsistent normals. You can enable backface culling in Blender to get the same result (or disable it for Armory in Armory Render Path but that will introduce performance hit).

[XQDD]

I think there should be a FAQ to explain some common mistakes...

[zicklag]

@XQDD Maybe you should start the doc. :smiley: I think that it isn't a bad idea. This is definitely something I would have liked to known about. Either an FAQ or a Tips & Tricks type document.

The docs repo is here if you are interested.

[XQDD]

No problem, and when I'm free I will do this

[luboslenco]

Fixed via https://github.com/armory3d/armory/pull/1401.