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Normal index 12868 is out of bounds #243

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congtong opened this issue Jul 15, 2020 · 5 comments
Open

Normal index 12868 is out of bounds #243

congtong opened this issue Jul 15, 2020 · 5 comments

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@congtong
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When I execute this command node obj2gltf/bin/obj2gltf.js -i model.obj -o box.gltf

An error like this occurs： Normal index 12868 is out of bounds
@lilleyse
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@congtong can you upload the obj model so we can help debug?

@congtong
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@lilleyse thanks!

model.zip

@lilleyse
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lilleyse commented Aug 6, 2020

@congtong there's a few nan's in the obj which is causing the parser to skip those lines

vn 0 -0.00000023035368 1
vn nan nan nan
vn -0.17363405227661 0 -0.98481023311615
vn -0.63710129261017 -0.63440746068954 0.43775460124016
vn -0.34200474619865 0 -0.93969821929932
vn nan nan nan
vn -0.5000251531601 0 -0.86601090431213
vn -0.50270861387253 -0.61126267910004 0.61126267910004
vn -0.64278835058212 0 -0.76604384183884
vn -1 -0.00000000000086 0
vn -0.76603543758392 0 -0.6427983045578
vn nan nan nan
vn -0.00016898373724 -0.70710676908493 0.70710676908493
vn -0.86602908372879 0 -0.49999359250069

Are you using Vectorworks? I saw a similar bug report in assimp: assimp/assimp#2428

@bennlich
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It looks like assimp decided to coerce NaNs to 0s: assimp/assimp#2429

@uc-asa
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uc-asa commented Jun 21, 2023

I'm also facing the same with but with a bit different message 'Normal index 47 is out of bounds'

edsu added a commit to sul-dlss-labs/3d-eval that referenced this issue Nov 7, 2023
@edsu
Correct invalid .obj files
1b15028 
There were a few obj files that contained some instructions which
obj2gtfl was not able to recognize, which then through off the vertex
indexing and caused the conversion to fail with an error:
"Normal index ___ is out of bound"

- hs903fr5133
- kn073qt9437
- pr756nc2659
- vr966cz0421
- vx600rw8369
- yg363gd9984

I found some information about it at CesiumGS/obj2gltf#243

To remediate the converter first creates a copy of the original .obj
file, and edits "nan" values to "0.0" in the copy. This copy is then
used to run the obj2gltf program.
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4 participants
@bennlich @lilleyse @congtong @uc-asa