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USD: Add an option to only export Deform Bones for Armatures #114800

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Michael Kowalski merged 4 commits from CharlesWardlaw/blender:feature/usdskel_only_deform into universal-scene-description 2023-11-26 22:07:50 +01:00
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Charles Wardlaw commented 2023-11-13 15:55:09 +01:00
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This patch adds an Only Deform Bones flag to the exporter so that when exporting UsdSkel assets, non-deforming helper bones are skipped. If deform bones live as leaf bones along a chain of non-deforming bones, their non-deforming parents are also exported in order to preserve hierarchy relationships and animation.

Finally, this patch reorders the joint weight binding orders for UsdGeomMesh exports to match the order and count of joints written on the UsdSkel side per clip.

This patch adds an Only Deform Bones flag to the exporter so that when exporting UsdSkel assets, non-deforming helper bones are skipped. If deform bones live as leaf bones along a chain of non-deforming bones, their non-deforming parents are also exported in order to preserve hierarchy relationships and animation. Finally, this patch reorders the joint weight binding orders for UsdGeomMesh exports to match the order and count of joints written on the UsdSkel side per clip.
Charles Wardlaw added 3 commits 2023-11-13 15:55:22 +01:00
Charles Wardlaw requested review from Michael Kowalski 2023-11-13 15:55:49 +01:00
Charles Wardlaw added 1 commit 2023-11-13 15:55:58 +01:00
Michael Kowalski reviewed 2023-11-26 21:56:19 +01:00
source/blender/io/usd/intern/usd_writer_armature.cc
@ -31,0 +35,4 @@
static inline bool is_deform_bone(const Bone *bone,
std::unordered_map<const char *, bool> &should_export)
{
Michael Kowalski commented 2023-11-26 21:56:19 +01:00
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The is_deform_bone() functions are not used.

The `is_deform_bone()` functions are not used.
Michael Kowalski reviewed 2023-11-26 21:59:00 +01:00
source/blender/io/usd/intern/usd_armature_utils.cc
@ -174,0 +201,4 @@
size_t num_bones = 0;
size_t num_deform_bones = 0;
size_t num_deform_parent_bones = 0;
Michael Kowalski commented 2023-11-26 21:59:00 +01:00
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The num_bones, num_deform_bones and num_deform_parent_bones counts don't appear to be used anywhere.

The `num_bones`, `num_deform_bones` and `num_deform_parent_bones` counts don't appear to be used anywhere.
Michael Kowalski approved these changes 2023-11-26 22:01:58 +01:00
Michael Kowalski left a comment
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This commit looks good and works well in my tests. Thank you for implementing this.

As per my comments, there are some unused functions and local variables, but I will remove these myself in a separate commit.

This commit looks good and works well in my tests. Thank you for implementing this. As per my comments, there are some unused functions and local variables, but I will remove these myself in a separate commit.
Michael Kowalski merged commit 4b0bffbdd3 into universal-scene-description 2023-11-26 22:07:50 +01:00
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