Blender Git Commits

Volumes: cycles rendering support of volume object as dense grids

This does not yet use OpenVDB grid transforms properly, in particular
it is assumed all grids have the same transform and do not contain
rotation or shear.

The conversion is also not optimized. Grid bounds are being computed
multiple times, and for the bounding mesh we should be using the VDB
tree directly.

Volumes: work on completing the grid access API

Volumes: more work towards on-demand loading

Objects: initial viewport draw of hair, point cloud and volumes

* Hair works in workbench and Eevee, by generating batch caches compatible with
particle hair. Selection does not work, and there is no code yet for
attributes like variable radius or UVs.

* Volumes are rendered by workbench and Eevee. But they only used the density
grid, ignore OpenVDB transforms and the code here is generally incomplete.

* Point clouds are only drawn as part of the overlay engine, just a quick hack
to show something and not properly integrated as part of workbench and Eevee.

Merge branch 'master' into new-object-types

Volumes: show error message in panel when volume failed to load

Objects: use separate location and radius arrays for hair and point cloud

Objects: use evaluated data runtime storage for hair, point clouds and volumes

Objects: make evaluated data runtime storage usable for types other than mesh

Volume: basic on-demand reading of grid tree

Volumes: more elegant C <-> C++ integration for grids, without casting

Objects: add initial structures for hair, point cloud and volume datablocks

This is a starting point for developers, these don't do anything useful
yet and have no drawing or rendering code.

Ref T68981, T73201.

Cleanup: remove unused partial visibility code

Memory: add OBJECT_GUARDED_SAFE_DELETE like MEM_SAFE_FREE

And fix an issue when using namespace.