Triangulation of USD Mesh faces fails in Omniverse Create

Omniverse Developer Tools & Resources Samples & Examples
1

Hi, my name is ft-lab.
This is my first post.

When importing USD in Omniverse Create(2021.1.0), the triangulation of polygons would sometimes not split correctly.
It seems to fail sometimes in the case of concave polygon.

A sample file is attached (divPolygons.usda).
divPolygons.usda (3.5 KB)

In this file, “Concave2” is fails.

Original :
org_mesh_faces

2

In Omniverse Create(2021.1.0), it looks like this:

omniverse_mesh_faces
omniverse_mesh_faces700×976 98.1 KB

3

I’ve verified that usdview with 21.05 has the same behavior.

divpolys_usd_21.05
divpolys_usd_21.051147×1015 79.1 KB

Can you report this to Pixar at Issues · PixarAnimationStudios/USD · GitHub ? Thanks!

4

Yes, I have already confirmed that the same is displayed in usdview.
It was the same display in AR Quick Look in iOS/iPadOS.

In usd, the structure is as follows.

divPolygon_20210416
divPolygon_202104161200×460 89.3 KB

In the DCC tool, I often want to treat them as polygons.

Can you report this to Pixar at Issues · PixarAnimationStudios/USD · GitHub ?

Oh, I will report it on GitHub and then report it again!

5

I reported this in the USD Issues on GitHub.

https://github.com/PixarAnimationStudios/USD/issues/1494

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