Transform evaluation does depend on that matrix, but relation was never
in dependency graph. It was not even in the old dependency graph, which
makes me wonder how this thing worked reliably to begin with.
Should fix flickering issue in the render farm.
Transform evaluation doesn't not depend on objects which are being duplicated,
so should not be any regressions here.
The whole relation should probably be gone as it's kind of rooting back to
legacy times, but that would need more clear research and investigation and
regression testing.
Note this is now separate from H key hiding, and meant for more persistent
ways to define which objects are relevant to the viewport or render.
This avoids some cases where you'd have to create collection specifically
to hide objects for viewport/render.
Currently done for mesh batch cache update, and for base flags sync.
Those components do not need anything from original object, and hence
can skip CoW tag and have faster update after them used.
Completely ignore animation for legacy zero update tag.
If one needs animation to be evaluated, tag with proper update tag, stop relying
on direct assignment of adt->>recalc with zero update tag for DEG.
This commit might cause missing updates when needed, those needs to be looked
into once they happen.
This makes evaluated objects to point to a non-evaluated collection,
which is already really bad. What is even more worse, objects in those
collections are not evaluated either.
Proper solution would be to implement visibility flag for nodes, which
will be set to 0 for transform/geometry components, but which will be
1 for copy-on-write components.
This way we will guarantee consistency of dependency graph.
For now this change is good enough and unlocks production.
Fixes T55375: Crash when changing visibility of instanced collection
Fixes T55357: Particle geometry crash
This is a beginning of series of commits which will clearly separate
building IDs which are used as object data from object building.
The goal is to be able to always build whatever ID. Required to make
driver targets to work reliably with copy-on-write concept.
DATA datablock must evaluation must never depend on object it is
used for. If there is something what depends on an object, it must
be done on object level.
At least the actual callback was empty.
Make it more reliable and predictable way of getting pointer to
an original mesh which came from copy-on-write engine.
Related change: made it (hopefully) more clear name for flags.
This includes:
- Skip OB_RECALC_TIME tag from object duplicate operator
not sure why it is needed: even if original object was
animated, duplicating it will copy evaluated values.
- Don't tag whole ID for update when updating it after
relations rebuilt. Use the same trickery to detect
whether animation is to be re-evaluated or not as is
done for update flag=0.
- Don't tag datablocks which are expanded for update
of copy-on-write.
- Avoid flush along relation from copy-on-write
operation in action. This will not invalidate any
pointers in the copied datablock since we don't
reference anything in the action.
