2.8 KiB
Minutes from 104th OpenVDB TSC meeting, September 7th, 2021, (EDT)
Attendees: Jeff L., Andre P, Nick A., Dan B,
Additional Attendees: JT Nelson (Blender), Bruce Cherniak (Intel), Richard Jones (DNeg), Edward Lam (SideFX)
Regrets: Ken M
Agenda:
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Confirm Quorum
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Secretary
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Forum/Issues
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Outstanding PRs
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Explicit Template Instantiation
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Next meeting
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Confirm Quorum
Quorum is present.
- Secretary
Secretary is Nick Avramoussis
- Forum/Issues
Nothing of note.
- Outstanding PRs
#1106 Extrapolation direction Jeff, would be good to get this in for a 8.2 release. When is this happening? #1164 VDB namespace Jeff, don't mind about how the namespace is customized. Nick, will change to a suffix. #1110 String Grids Nick, it's impossible to deprecate the NodeUnion specialization for StringGrids whilst string grids are instantiated by the library as it dumps a tonne of deprecation warnings. We could potentially just remove StringGrids support in one go - this would manifest in users having to define the alias themselves if they were using them and potentially breaking serialization (although we believe serialization is already broken). Nick, there's nothing being blocked by the code persisting so perhaps no rush. To discuss next TSC with Ken. #1008 Point Stats Type promotion for result is in but signatures fail to compile unless users deduce this themselves. Jeff, result should just be returned at the precision of the attribute type. Nick to change. Jeff, we should undefine the behaviour for P as it's weird. Nick to change or add an exception. #1109 AX Colour Functions Merged
- Explicit Template Instantiation
Dan, presented findings which have been added to the google doc and summarized on the ASWF message board. Discovered that inlining essentially disables explicit template instantiation and, as we inline everything, it turns out it's not a huge benefit for the VDB classes. The biggest benefit is in the tools, as templated freestanding member functions are generated at instantiation so ODR doesn't apply. Dan, it might not be worth inlining IO methods due to their overhead. Discussion about how different compilers treat templates specific to inline on different Platforms. Edward, need to be careful with MSVC, it might not be possible to remove inline. Dan, main thing to get consensus on is CMake configuration. Nick, can these files not be generated and committed along with the repo? Dan, see no reason to not always build them during CMake configure. Discussion around symbol visibility. Dan, the EXR project have moved to a hidden-by-default behaviour in EXR 3 and we need to be careful that extern templates do not change default visibility. As an aside, it would be good to have tests/CI for VDB building with hidden visibility and look into this more.
- Next meeting
Next meeting is September 14th, 2021. 12pm-1pm EST (GMT-5).