Due to a recent change, empty strings are unhandled. This results
in Blender crashing.
This patch fixes the crash but a discrepancy still exists...
Prior to the regression, the empty string would be replaced by the
name of the data type. This patch uses "Attribute" for the default
name regardless of type. Restoring the previous behavior would
require making and/or modifying API methods.
Regression introduced in: rBeae36be372a6
Reviewed By: Joseph Eagar & Campbell Barton
Differential Revision: https://developer.blender.org/D14734
Ref D14734
This fixes two issues:
* There was a crash when the new attribute name was empty.
* The attribute name was incremented (e.g. "Attribute.001") when
the old and new name were the same.
Use the C++ API to implement more of the existing C functions.
This corrects the cases where one tries to add a builtin attribute
with the wrong domain or type on curves, though a better warning
message would be helpful in the future, and also reduces duplication
of the internal logic. Not much more is possible without changing
the interface.
Use the new attribute API to implement the attribute remove function
used by RNA, except for BMesh attributes. Currently, removing curve
attributes from the panel in the property editor does not mark the
relevant caches dirty (for example, the cache of curve type counts),
because that behavior is implemented with the new attribute API.
Also, eventually we want to merge the two APIs, and removing an
attribute is the first function that can be partially implemented
with the new API.
Differential Revision: https://developer.blender.org/D15495
Currently, there are two attribute API. The first, defined in `BKE_attribute.h` is
accessible from RNA and C code. The second is implemented with `GeometryComponent`
and is only accessible in C++ code. The second is widely used, but only being
accessible through the `GeometrySet` API makes it awkward to use, and even impossible
for types that don't correspond directly to a geometry component like `CurvesGeometry`.
This patch adds a new attribute API, designed to replace the `GeometryComponent`
attribute API now, and to eventually replace or be the basis of the other one.
The basic idea is that there is an `AttributeAccessor` class that allows code to
interact with a set of attributes owned by some geometry. The accessor itself has
no ownership. `AttributeAccessor` is a simple type that can be passed around by
value. That makes it easy to return it from functions and to store it in containers.
For const-correctness, there is also a `MutableAttributeAccessor` that allows
changing individual and can add or remove attributes.
Currently, `AttributeAccessor` is composed of two pointers. The first is a pointer
to the owner of the attribute data. The second is a pointer to a struct with
function pointers, that is similar to a virtual function table. The functions
know how to access attributes on the owner.
The actual attribute access for geometries is still implemented with the `AttributeProvider`
pattern, which makes it easy to support different sources of attributes on a
geometry and simplifies dealing with built-in attributes.
There are different ways to get an attribute accessor for a geometry:
* `GeometryComponent.attributes()`
* `CurvesGeometry.attributes()`
* `bke::mesh_attributes(const Mesh &)`
* `bke::pointcloud_attributes(const PointCloud &)`
All of these also have a `_for_write` variant that returns a `MutabelAttributeAccessor`.
Differential Revision: https://developer.blender.org/D15280
Use a name argument, for the same reasons as 6eea5f70e3.
Also reuse the layer and unique name creation in `BKE_id_attribute_new`
instead of reimplementing it. Also include a few miscellaneous cleanups
like using const variables and `std::string`.
Fixes T97706
Adds operator to duplicate the active color attribute layer.
Adds `"Color Attribute Specials"` menu to color attribute ui to access the `"geometry.color_attribute_duplicate"` operator.
Internally adds a function that duplicates a referenced CustomDataLayer
- `BKE_id_attribute_duplicate` mostly copies the existing `BKE_id_attribute_new`
- but gets the type and domain from the referenced layer
- and copies the data from the old layer into the new layer
Reviewed By: Joseph Eagar & Hans Goudey & Julien Kaspar
Differential Revision: https://developer.blender.org/D14823
Ref D14823
This mirrors the C++ attribute API better, separates the implementation
of attributes from CustomData slightly, and makes functions simpler,
clearer, and safer.
Also fix an issue with removing an attribute caused by 97712b018d
meant the first attribute with the given type was removed instead of
the attribute with the given name.
If a geometry does not have CustomData for a certain domain,
it may still have CustomData on other domains. In that case
we need to continue to the other domains instead of returning.
This worked for meshes because the domains are all at the
start of the `info` array. It didn't work for curves.
This function only checked for uniqueness in the current domain,
while attribute names should be unique among all domains within
a geometry.
Differential Revision: https://developer.blender.org/D15144
This commit hides "UI attributes" described in T97452 from the UI lists
in mesh, curve, and point cloud properties, and disallow accessing them
in geometry nodes.
Internal UI attributes like selection and hiding values should use the
attribute system for simplicity and performance, but we don't want to
expose those attributes in the attribute panel, which is meant for
regular user interaction. Procedural access may be misleading or cause
problems, as described in the design task above.
These attributes are added by two upcoming patches: D14934, D14685
Differential Revision: https://developer.blender.org/D15069
