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.
After discussion with Sergey and Dalai, we have decided to remove
this option completely. We're getting to the point where it is almost
impossible to really use 2.8 without COW, and keeping the old option
running ends up diverting dev resources away towards tracking down
and fixing problems with a parallel system that will be going away.
This introduces a new depsgraph API for getting updated datablocks,
rather than getting it from bpy.data.
* depsgraph.ids_updated gives a list of all datablocks in the depsgraph
which have been updated.
* depsgraph.id_type_updated('TYPE') is true if any datablock of the given
type has been added, removed or modified.
More API updates are coming to properly handle multiple depsgraphs and
finer update granularity, but this should make Cycles work again.
This is a first step to have correspondence of legacy derivedDeform
within a new formulation. Only base ground for now to support file
reading, copy-on-write remapping and such.
After copying animation data we need to re-map action, otherwise
our original DNA values will go out of symc, causing flickering
when tweaking values on animated node tree.
There are various values which depends on context in there, for example
current driver value and original DNA value f-curve is applied for.
This partially fixes issue with not being able to tweak keyed values
when material preview is open.
The material preview is not being currently updated against non-keyed
changes since every tweak of material property does full preview scene
depsgraph evaluation.
Previously it could have happened on every request to evaluated scene
or view layer.
This commit also removes expansion of view layer and scene from iterator.
Iterator is not to be used before depsgraph is evaluated.
Was caused by two things from the past:
- Tagging would set id->recalc to COW update flag.
This one is to be ignored.
- Particle tagging will use psys recalc flags on id->recalc,
but we only need to use flags from particles. Otherwise
it will be some collisions in bit masks.
The depsgraph was always created within a fixed evaluation context. Passing
both risks the depsgraph and evaluation context not matching, and it
complicates the Python API where we'd have to expose both which is not so
easy to understand.
This also removes the global evaluation context in main, which assumed there
to be a single active scene and view layer.
Differential Revision: https://developer.blender.org/D3152
Unless there is an external action from an user, there should not
be need in re-copying original datablock to a copied one.
This brings performance up from 5fps to 11fps with Spring runcycle
(performance in master is 14fps).
Quite straightforward implementation, allows us to remove all the cherry-picking
update of specified scene/view layer/collection fields. Makes it possible to use
generic function to update scene.
The tricky part is that we need to know view layer pointer before the whole
evaluation starts. So we actually expand scene at initialization of evaluation.
context. This is still a bit of an exceptional case, but at least we still avoid
dangerous cherry-picking update.
