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This is complex situation. Tagged ID deletion (used to delete several
data-blocks at once) removes IDs to be deleted from Main.
But when we remove deleted IDs' usages of other IDs (using
`BKE_libblock_relink_ex`), some specific post-process is required on
some types, like Collections. Those post-processes would in some cases
rely on data actually being in Main.
That failing condition would lead in existing code on missing processing
the very ID (collection) we were working on, leading to missing removing
some child collection pointers, leading to the crash (later on in
LayerCollection resync process).
For now we go with an optimization & fix that avoids processing all
collections in Main when we actually know which one we are working one
(case of `BKE_libblock_relink_ex`, but not of
`BKE_libblock_remap_locked`).
This is however yet another demonstration of the need to rework that
whole collection/layer resync process, since it is not only extremely
inneficient currently, but it also requires valid Main/ID state way too
deep into the remapping code.
NOTE: This fix may very well not catch/address all possible fail cases
here, dealing with the double parent/child relationships of collections
is challenging...
Issue reported by @eyecandy from the studio, thanks.
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In some cases (advanced, low-level), we also want to remap pointers like
`ID.newid` or `ID.orig_id`.
Only known case currently is `id_delete`, to avoid leaving potential access to freed memory. See next commit and T86501.
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Keep the pointer location from the initial window-manager
between file load operations.
This is needed as the Python API may hold references to keymaps for e.g.
which are transferred to the newly loaded window manager,
without their `PointerRNA.owner_id` fields being updated.
Since there is only ever one window manager, keep the memory at the same location so the Python ID pointers stay valid.
Reviewed By: mont29
Ref D10690
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Remove DNA headers, using forward declarations where possible.
Also removed duplicate header, header including it's self
and unnecessary inclusion of libc system headers from BKE header.
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The parameter type was incorrectly changed in rB6be56c13e96048cbc494ba5473a8deaf2cf5a6f8 by me.
This can be any id and does not have to be a node tree.
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This is the initial merge from the geometry-nodes branch.
Nodes:
* Attribute Math
* Boolean
* Edge Split
* Float Compare
* Object Info
* Point Distribute
* Point Instance
* Random Attribute
* Random Float
* Subdivision Surface
* Transform
* Triangulate
It includes the initial evaluation of geometry node groups in the Geometry Nodes modifier.
Notes on the Generic attribute access API
The API adds an indirection for attribute access. That has the following benefits:
* Most code does not have to care about how an attribute is stored internally.
This is mainly necessary, because we have to deal with "legacy" attributes
such as vertex weights and attributes that are embedded into other structs
such as vertex positions.
* When reading from an attribute, we generally don't care what domain the
attribute is stored on. So we want to abstract away the interpolation that
that adapts attributes from one domain to another domain (this is not
actually implemented yet).
Other possible improvements for later iterations include:
* Actually implement interpolation between domains.
* Don't use inheritance for the different attribute types. A single class for read
access and one for write access might be enough, because we know all the ways
in which attributes are stored internally. We don't want more different internal
structures in the future. On the contrary, ideally we can consolidate the different
storage formats in the future to reduce the need for this indirection.
* Remove the need for heap allocations when creating attribute accessors.
It includes commits from:
* Dalai Felinto
* Hans Goudey
* Jacques Lucke
* Léo Depoix
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Issue was with our dear posebones again... when applying overrides we
keep the same address/pointer for the IDs themselves, (which avoids us
the need to remap their usages), but their inner data is often
re-allocated.
Therefore, we need once again to go over armature objects and invalidate
their posebone pointers.
This should also be back-ported to Blender LTS 2.83.
Maniphest Tasks: T80078
Differential Revision: https://developer.blender.org/D8734
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Existing code would not follow as expected into new sub-IDs if they were
only encoutered once in usages by parent IDs...
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Only the volume object is exposed in the user interface. It is based on OpenVDB
internally. Drawing and rendering code will follow in another commit.
https://wiki.blender.org/wiki/Source/Objects/Volume
https://wiki.blender.org/wiki/Reference/Release_Notes/2.83/Volumes
Hair and PointCloud object types are hidden behind a WITH_NEW_OBJECT_TYPES
build option. These are unfinished, and included only to make it easier to
cooperate on development in the future and avoid tricky merges.
https://wiki.blender.org/wiki/Source/Objects/New_Object_Types
Ref T73201, T68981
Differential Revision: https://developer.blender.org/D6945
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'Private' can be a rather confusing term, especially when considering
its meaning in programming languages.
So now root node trees and master collections are 'embedded' IDs
instead.
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The former is always a real, in-Main data-block, while the later, when
different, should be one of those embedded 'private' IDs (like root node
ree or master collection).
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Getting rid of one static 'registered' callback in BKE, yeah!
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Using a struct here allows to change given parameters to the callbacks
without having to edit all callbacks functions, which is always noisy
and time consuming.
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Having functions defined in `BKE_lib_id.h` implemented into
`lib_remap.c` was confusing at best.
Besides trivial code splitting and header includes cleanup, had to add a
new `lib_intern.h` header for callbacks used by both remapping and
deletion code.
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Note that `BKE_library.h`/`library.c` were renamed to
`BKE_lib_id.h`/`lib_id.c` to avoid having a too generic name here.
Part of T72604.
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