Added TSC notes

Signed-off-by: Nick Avramoussis <[email protected]>

Author: Idclip

tsc/meetings/2021-06-22.md

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+Minutes from 96th OpenVDB TSC meeting, June 22nd, 2021, (EDT)
+
+Attendees: *Nick* A., *Jeff* L., *Dan* B., *Andre* P.
+
+Additional Attendees: JT Nelson (Blender), Richard Jones (DNeg),
+Johannes Meng (Intel), Bruce Chernia (Intel)
+
+Regrets: *Ken* M.
+
+Agenda:
+
+1) Confirm Quorum
+2) Secretary
+3) PyBind11
+4) OpenPRs
+5) VDB Visualize SOP
+
+
+1) Confirm Quorum
+
+Quorum is present.
+
+2) Secretary
+
+Secretary is Nick Avramoussis.
+
+3) PyBind11
+
+Nick has sent an email outlining the proposed work. All agree with Dan that the
+work can be incrementally completed. A feature/pybind11 branch exists for the
+target of this work. Nick to post as a Github Issue. The feature branch is to
+be kept in sync on subsequent releases of OpenVDB.
+
+4) Open PRs
+
+Deprecating StringGrids: All approve but should wait for Kens approval too.
+
+TBB 2021: Nick, incomplete CI. Majority agree that this should not hold up this
+work. Jeff, already downstreamed some of it into Houdini. Nick to merge. We
+can release a new (minor) version of VDB with this support. This needs approval
+from Ken and we should discussing the versioning required.
+
+EXR 3 (no PR, related to a proposed TBB release): How we bump VDB with the TBB
+2021 changes is sort of related to how we would release a new version with 
+EXR 3 support. All agree that the path of least resistance is to make EXR 
+support in the command line tool optional, then add support for EXR 3. There's
+still a question about the VFX platform's 2022 versioning if we don't support
+it before EOY.
+
+hsvtorgb: AX PR adding color conversion methods. Rich, tested against VEX's 
+implementation which seems to clamp inputs going from hsv to rgb. Jeff, hue is
+most likely wrapped and saturation is clamped. Nick to make these changes.
+
+Counting Tools: Dan, ran into some issues with g++ AX builds exceeding memory
+limits. Fixed by forcing the CI to build on one thread. PR needs approval.
+
+CMake variable for Houdini DSOs: Dan, needs approval. There were issues with
+proposed alternatives (building individual targets with makefiles) so Nick 
+agrees this proposal is fine. One outstanding point was the fact that there
+are two CMake variables which are attempting to achieve the same thing. The
+first is documented at the top of the Houdini CMakeLists.txt file and turns
+off nodes. Dan's new system turns nodes on. Ideally we would have a single 
+variable which supported both. Nick, a regex string would be good. 
+Introducing this new system is not ideal as it stands but can be improved
+in the future.
+
+Grain size dynamic node manager: Still no clear path forward here.
+
+5) VDB Visualize SOP
+
+Dan has parallelized some of the geometry construction from the VDB visualize
+SOP. Points from voxels is now much faster. Sold + wireframe generation is not
+parallelized. As part of this, Dan has removed lots of old compile time logic
+specific to SESI/DWA. Dan, also trying to add slicing support, a common feature
+done as a post processes to visualize a slice of a VDB. Jeff, this can be a
+pain due to relative bounds moving or absolute index coordinates changing over
+a frame range. Nick, solves this by clipping the input geometry though this
+isn't the exact same solution as it needs a bounds to define the slice. Dan to
+experiment with some solutions.