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USD: export to a single root prim by default #113187

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Michael B Johnson wants to merge 8 commits from wave/blender_wave_Apple:single_root_io into main
pull from: wave/blender_wave_Apple:single_root_io
merge into: blender:main

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Conversation 6 Commits 8 Files Changed 7 +84 -13
Michael B Johnson commented 2023-10-03 06:22:42 +02:00
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This PR adds the following changes:

  • A single root is always set as default. After talking to Wave and Spiff, we settled on root being the best default. Users who don't want a single root prim inserted, can choose to clear the field
  • The root prim no longer requires the user to prefix the field with /. It will implicitly insert that for them.
  • On export, the root_prim hierarchy is now defined all as Xform instead of just the final prim in the path. Each prim also has custom metadata added to show that it was generated by Blender. This follows convention in other DCCs as well.
  • On import, the code now finds the hierarchy of generated prims using that metadata. It then skips importing them. This means that you can roundtrip hierarchies even with an inserted root.
This PR adds the following changes: - A single root is always set as default. After talking to Wave and Spiff, we settled on root being the best default. Users who don't want a single root prim inserted, can choose to clear the field - The root prim no longer requires the user to prefix the field with /. It will implicitly insert that for them. - On export, the root_prim hierarchy is now defined all as Xform instead of just the final prim in the path. Each prim also has custom metadata added to show that it was generated by Blender. This follows convention in other DCCs as well. - On import, the code now finds the hierarchy of generated prims using that metadata. It then skips importing them. This means that you can roundtrip hierarchies even with an inserted root.
Michael B Johnson added 6 commits 2023-10-03 06:22:53 +02:00
6a2aab8054 Define root_prim as xform hierarchy, instead of just final prim 
Mark autogenerated root prims as such so that they can be elided on roundtripping
Matt McLin added this to the USD project 2023-10-05 02:06:33 +02:00
Matt McLin changed title from single_root_io to USD: export to a single root prim by default 2023-10-05 02:07:27 +02:00
Michael Kowalski was assigned by Matt McLin 2023-10-05 02:07:43 +02:00
Matt McLin added the
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Matt McLin requested review from Michael Kowalski 2023-10-05 02:13:00 +02:00
Michael Kowalski was unassigned by Matt McLin 2023-10-05 02:13:04 +02:00
Michael Kowalski commented 2023-10-13 15:32:00 +02:00
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I'm currently reviewing this. Sorry for the delay.

I'm currently reviewing this. Sorry for the delay.
Michael Kowalski reviewed 2023-10-13 23:16:36 +02:00
source/blender/editors/io/io_usd.cc Outdated
@ -372,3 +379,3 @@
RNA_def_string(ot->srna,
"root_prim_path",
nullptr,
"root",
Michael Kowalski commented 2023-10-13 23:16:36 +02:00
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Maybe the default string should be "/root", so we don't have to prepend the leading slash each time?

Maybe the default string should be "/root", so we don't have to prepend the leading slash each time?
Dhruv Govil commented 2023-10-16 20:13:35 +02:00
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Changed! Thanks for that note

Changed! Thanks for that note
Michael Kowalski commented 2023-10-13 23:41:29 +02:00
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If you don't mind, can you please run 'make format' to fix the formatting, please?

Otherwise, apart from the minor comment regarding adding a leading slash to the default root path, this looks good!

If you don't mind, can you please run 'make format' to fix the formatting, please? Otherwise, apart from the minor comment regarding adding a leading slash to the default root path, this looks good!
Michael B Johnson added 1 commit 2023-10-16 20:10:15 +02:00
Michael B Johnson added 1 commit 2023-10-16 20:12:03 +02:00
buildbot/vexp-code-patch-coordinator Build done. Details
1423f77920 Address notes on default root prim value
Dhruv Govil commented 2023-10-16 20:14:20 +02:00
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If you don't mind, can you please run 'make format' to fix the formatting, please?

@makowalski Done. Thanks for catching that!

> If you don't mind, can you please run 'make format' to fix the formatting, please? @makowalski Done. Thanks for catching that!
Michael Kowalski commented 2023-10-19 16:29:32 +02:00
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@blender-bot build

@blender-bot build
Michael Kowalski approved these changes 2023-10-19 16:47:40 +02:00
Michael Kowalski left a comment
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Thanks for the updates! The changes look good!

Thanks for the updates! The changes look good!
Michael Kowalski commented 2023-10-20 17:00:12 +02:00
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I merged this manually in order to fix a conflict and am closing this PR.

I merged this manually in order to fix a conflict and am closing this PR.
Michael Kowalski closed this pull request 2023-10-20 17:00:14 +02:00
Campbell Barton commented 2023-11-02 06:29:37 +01:00
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Reminder to use BLI_snprintf which ensures null termination instead of snprintf, committed fix to main.

Reminder to use `BLI_snprintf` which ensures null termination instead of `snprintf`, committed fix to `main`.
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Bastien Montagne removed this from the USD project 2023-11-02 16:14:21 +01:00
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