OBJ: new 3.2 importer in some cases ("o" after vertex data) fails to import faces correctly #99532

New Issue

Aras Pranckevicius · 2022-07-07T20:47:11+02:00

2022-07-07 20:47:11 +02:00

Short description of error

If an .obj file contains vertex data ("v", "vn", etc.) and only after those contains the "o" tag, then that object fails to import correctly.

This bug report was originally reported privately with a giant NDA file; made a tiny repro myself here.

Exact steps for others to reproduce the error

Using the new (3.2+) OBJ importer, import the attached specially crafted .obj file: cube_vertex_groups.obj cube.mtl

The old one imports it correctly (objects: ActualCube, SparseTri):

But the new one imports only the vertices, and names the objects wrong (cube_o_after_verts, SparseTri):

**Short description of error** If an .obj file contains vertex data ("v", "vn", etc.) and only after those contains the "o" tag, then that object fails to import correctly. This bug report was originally reported privately with a giant NDA file; made a tiny repro myself here. **Exact steps for others to reproduce the error** Using the new (3.2+) OBJ importer, import the attached specially crafted .obj file: [cube_vertex_groups.obj](https://archive.blender.org/developer/F13266010/cube_vertex_groups.obj) [cube.mtl](https://archive.blender.org/developer/F13266011/cube.mtl) The old one imports it correctly (objects: ActualCube, SparseTri): ![obj-old.png](https://archive.blender.org/developer/F13266005/obj-old.png) But the new one imports only the vertices, and names the objects wrong (cube_o_after_verts, SparseTri): ![obj-new.png](https://archive.blender.org/developer/F13266007/obj-new.png)

Aras Pranckevicius commented

2022-07-07 20:47:11 +02:00

Added subscriber: @aras_p

Aras Pranckevicius self-assigned this 2022-07-07 20:48:14 +02:00

Aras Pranckevicius commented

2022-07-07 20:48:14 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'