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Fix #120400: Remove cyclic dependency of pbvh type when building bmesh pbvh #120445

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Hans Goudey merged 1 commits from Sean-Kim/blender:120400-dyntopo-crash into main 2024-04-10 02:57:44 +02:00
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Sean Kim commented 2024-04-10 00:08:56 +02:00
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This PR fixes a crash when enabling Dyntopo.

When the PBVH generation code for BMesh was changed in b3aca5b28f, a bug was introduced where dependent code to generate necessary layers for BMesh could no longer access the PBVH type, as it was not generated yet. As the type is known in the code at time of construction, I opted to add parameters specifying the PBVHType to necessary methods when accessing attributes.

Possible Alternate Solutions

  • Reverting the change to PBVH creation to first generate a empty object with just the type specific, then creating layers, then generating the rest of the object seemed to be a step backwards for the overall API
  • Moving the layer generation code inside the PBVH creation code or otherwise further untangling the BMesh PBVH generation code seemed like a more invasive change than this PR
This PR fixes a crash when enabling Dyntopo. When the PBVH generation code for BMesh was changed in b3aca5b28f, a bug was introduced where dependent code to generate necessary layers for BMesh could no longer access the PBVH type, as it was not generated yet. As the type is known in the code at time of construction, I opted to add parameters specifying the PBVHType to necessary methods when accessing attributes. ## Possible Alternate Solutions * Reverting the change to PBVH creation to first generate a empty object with just the type specific, then creating layers, then generating the rest of the object seemed to be a step backwards for the overall API * Moving the layer generation code inside the PBVH creation code or otherwise further untangling the BMesh PBVH generation code seemed like a more invasive change than this PR
Sean Kim added 1 commit 2024-04-10 00:09:06 +02:00
Fix #120400: Remove cyclic dependency of pbvh type when building bmesh pbvh
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Sean Kim requested review from Hans Goudey 2024-04-10 00:10:12 +02:00
Hans Goudey approved these changes 2024-04-10 02:19:37 +02:00
Hans Goudey commented 2024-04-10 02:19:45 +02:00
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@blender-bot build

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Hans Goudey commented 2024-04-10 02:20:25 +02:00
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Thanks! This seems like a reasonable approach. Removing the implicit requirement for a certain ordering of function calls is a good thing.

Thanks! This seems like a reasonable approach. Removing the implicit requirement for a certain ordering of function calls is a good thing.
Hans Goudey merged commit ea1cfdbf83 into main 2024-04-10 02:57:44 +02:00
Sean Kim deleted branch 120400-dyntopo-crash 2024-04-11 01:43:20 +02:00
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