When allocating new `CustomData` layers, often we do redundant
initialization of arrays. For example, it's common that values are
allocated, set to their default value, and then set to some other
value. This is wasteful, and it negates the benefits of optimizations
to the allocator like D15082. There are two reasons for this. The
first is array-of-structs storage that makes it annoying to initialize
values manually, and the second is confusing options in the Custom Data
API. This patch addresses the latter.
The `CustomData` "alloc type" options are rearranged. Now, besides
the options that use existing layers, there are two remaining:
* `CD_SET_DEFAULT` sets the default value.
* Usually zeroes, but for colors this is white (how it was before).
* Should be used when you add the layer but don't set all values.
* `CD_CONSTRUCT` refers to the "default construct" C++ term.
* Only necessary or defined for non-trivial types like vertex groups.
* Doesn't do anything for trivial types like `int` or `float3`.
* Should be used every other time, when all values will be set.
The attribute API's `AttributeInit` types are updated as well.
To update code, replace `CD_CALLOC` with `CD_SET_DEFAULT` and
`CD_DEFAULT` with `CD_CONSTRUCT`. This doesn't cause any functional
changes yet. Follow-up commits will change to avoid initializing
new layers where the correctness is clear.
Differential Revision: https://developer.blender.org/D15617
Using the same `GeometryComponentFieldContext` for all situations,
even when only one geometry type is supported is misleading, and mixes
too many different abstraction levels into code that could be simpler.
With the attribute API moved out of geometry components recently,
the "component" system is just getting in the way here.
This commit adds specific field contexts for geometry types: meshes,
curves, point clouds, and instances. There are also separate field input
helper classes, to help reduce boilerplate for fields that only support
specific geometry types.
Another benefit of this change is that it separates geometry components
from fields, which makes it easier to see the purpose of the two concepts,
and how they relate.
Because we want to be able to evaluate a field on just `CurvesGeometry`
rather than the full `Curves` data-block, the generic "geometry context"
had to be changed to avoid using `GeometryComponent`, since there is
no corresponding geometry component type. The resulting void pointer
is ugly, but only turns up in three places in practice. When Apple clang
supports `std::variant`, that could be used instead.
Differential Revision: https://developer.blender.org/D15519
Before 8c25889bb6, subsurf face center tags were stored in each
vertex, so they were always copied to duplicate meshes. Now they are
stored in runtime data though, so they need to be copied explicitly.
The function name "reset_on_copy" is a bit awkward here, so the
tags are copied by the caller.
Actually, when you increase the thickness of the stroke in the outline conversion, the shape of the stroke changes and becomes thicker.
This commit includes a new algorithm to correct this problem. A new `Keep Shape` parameter allows you to disable it because, for artist reasons, it may be good to keep the old algorithm and change the shape.
If these layers didn't exist on the original mesh, they would be created
from scratch and transferred anyway. That is inefficient because all the
work is pointless, and because creating these layers could slow down
subsequent sculpt operations.
It's possible for misbehaving scripts written before 3.3 to reach
this state and crash Blender. With this change, the error is reduced
to a Python exception.
Differential Revision: https://developer.blender.org/D15724
OpenVDB crashes when the determinant of the grid transformation is
too small. The solution is too detect when the determinant is too small
and to replace the grid with an empty one. If possible the translation
and rotation of the grid remains unchanged.
Differential Revision: https://developer.blender.org/D15806
Translate:
- new group socket names
- default names Input and Output
- on connecting a link from another node
- new geometry nodes input and output socket names
Reviewed By: mont29
Differential Revision: https://developer.blender.org/D15763
Weight and Vertex paint don't change coordinates and thus don't need
crazyspace data, which allows using coordinates from normal evaluated
meshes.
Since painting uses original topology, the deform only mesh is used,
but if the fully evaluated mesh has the same topology, it is preferred.
This is useful because not only Geometry Nodes, but even simple weight
computation modifiers are excluded from the deform only mesh evaluation.
Differential Revision: https://developer.blender.org/D15501
This new option converts the stroke to outline perimeter as soon as is drawn.
If no alternative material is set, the actual material is used.
The algorithm is similar to the new operator in D15664
Reviewed By: pepeland
Differential Revision: https://developer.blender.org/D15738
When the curve type attribute doesn't exist, there is no reason to
create an array for it only to fill the default value, which will add
overhead to subsequent "add" operations. I added a "get_if_single"
method to virtual array to simplify this check. Also use the existing
functions for filling curve types.
Differential Revision: https://developer.blender.org/D15560
The function does modify the object since it changes the name of a layer
it owns. Ideally this wouldn't be possible, but raw pointers don't have
ownership semantics so this is a common problem with CustomData.
Those collections were so far mainly just tagged as fake user (even
though a few places in code already incremented usercount on them).
Since we now clear the fakeuser flag when linking/appending data, ensure
that these collections are preserved by making these usages regular ID
refcounting ones.
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D15783
Commit is not working as expected in some cases, as revealed by
liboverride testcase entering infinite loop.
Code needs some more thinking.
This reverts commit ee7bd79b54.
Usually, when overriding collections, the linked reference ones are
removed from the ViewLayer, and the overrides replace them.
This change to `layer_collection_sync` code makes it so that in case
there is a free viewlayer hierarchy matching the linked collection, it
gets re-used for the override one, instead of re-creating everything
from scratch.
To achieve this, resync process is split into two steps, first regular
collections are processed, then the override ones. This should ensure
an override does not steal the layers of its reference if the later is
still instantiated in the view layer.
