The constness of the `ImplicitSharingPtr` does not imply the constness of the
referenced data, because that is determined by the user count. Therefore,
`ImplicitSharingPtr` should never give a non-const pointer to the underlying data.
Instead, one always has to check the user count, before one can do a `const_cast`.
Pull Request: https://projects.blender.org/blender/blender/pulls/115652
Avoid reusing the custom data type enum with additional values. Instead
use std::variant and type names to properly distinguish between custom
and generic attribute requests. Use a Vector to hold the requests.
Also attempt to simplify the string key building process for requests
and groups of requests in batches. Previously for every PBVH node it
would rebuild the key 3 times, now it only does it once. It's hard to
measure, but that process did show up in profiles, so performance is
probably slightly improved when many nodes are handled at once.
Pointers to hide status layers and custom data are removed,
since they can be accessed from the mesh as necessary.
Usage of other arrays has been reduced, so the pointers
can eventually be removed.
The reasoning is the same as some other commits in this area:
the goal is less duplication of state, and a more focused design
of the responsibilities of the PBVH class.
Some of the changes are fairly noisy, since we need to add
arguments to functions in a few places. On the nicer side of
things, some functions for syncing the state can be removed.
Not retrieving hide layers with write access also has performance
implications in some cases, since it means the original arrays can
be reused without a copy when they're shared.
This improves the early out in the mesh case so that it isn't
repeated for every node. Also simplifies using more local
variables that are specific to a certain PBVH type (in this
case, switching to the C++ attribute API and retrieving the
vertex visibility status that way).
- Pass Span by value. It is a small struct, and passed by reference
it acts as a pointer to a pointer.
- Remove unnecessary `= {}`. Vector has a default constructor.
- Use initializer list Span constructor to avoid temporary array.
Pull Request: https://projects.blender.org/blender/blender/pulls/115635
These are just duplicates of the pointers in `SubdivCCG`, which are
already quickly accessible. Keeping track of the state is too complex
and bloats the responsibilities of the PBVH too much.
Our `EnumerableThreadSpecific` wrapper doesn't accept an
example argument, only an initialization function. And some
removed variables were still used in asserts.
Caused by 383a145a19
Since above commit, normals were in a SharedCache, they need to be tagged dirty
for recalculation.
Instead of tagging the normals caches dirty explicitly, simply use
`BKE_mesh_tag_positions_changed` [which includes all this and also tags
positions dirty - which sounds also needed for updating other things]
Pull Request: https://projects.blender.org/blender/blender/pulls/115580
These updates are used to recalculate normals and average values between
grid boundaries during multires sculpting. In main the affected faces
are passed as an array of pointers. Using an `IndexMask` instead reduces
memory usage by 4x per affected face (8 byte pointer to 2 byte integer),
simplifies iteration and threading, and can also improve performance.
Finding which faces are affected is now multithreaded, with its runtime
changing from 0.63 ms to 0.12 ms in a simple test sculpting on a portion
of a 1 million face grid.
Also switch to VectorSet instead of GHash for finding affected adjacent
elements. That's a friendlier data structure that probably has better
performance as well.
The new grid socket (#115270) will make these nodes obsolete and
provide more elegant ways of implementing the features. Removing
these nodes now to clean up and make future changes simpler.
Pull Request: https://projects.blender.org/blender/blender/pulls/115567
Because reading memfile undo steps doesn't send the mesh through the
versioning code that converts legacy layers back to the new generic
format, we can't write the old format in undo steps. This same check
existed during the mesh struct of array refactor.
Inlining the functions is simpler nowadays, since there are utility
functions to copy spans and tag the mesh caches dirty. Also use an
array instead of a raw pointer for multires.
Resolves#103789
The issue was that bone colors are only specified with 3 channels (RGB),
but they're stored as 4 channels for some reason. So the fourth bogus
channel gets initialized to zero by default, which was then being
interpreted as zero alpha in some drawing modes.
This fixes the issue by ensuring that the fourth unused channel always
gets initialized to 255, and therefore can be validly interpreted as an
alpha channel.
Pull Request: https://projects.blender.org/blender/blender/pulls/115477
