With the ultimate goal of simplifying drawing and evaluation,
this patch makes the following changes and removes code:
- Use `Mesh` instead of `DispList` for evaluated basis metaballs.
- Remove all `DispList` drawing code, which is now unused.
- Simplify code that converts evaluated metaballs to meshes.
- Store the evaluated mesh in the evaluated geometry set.
This has the following indirect benefits:
- Evaluated meshes from metaball objects can be used in geometry nodes.
- Renderers can ignore evaluated metaball objects completely
- Cycles rendering no longer has to convert to mesh from `DispList`.
- We get closer to removing `DispList` completely.
- Optimizations to mesh rendering will also apply to metaball objects.
The vertex normals on the evaluated mesh are technically invalid;
the regular calculation wouldn't reproduce them. Metaball objects
don't support modifiers though, so it shouldn't be a problem.
Eventually we can support per-vertex custom normals (T93551).
Differential Revision: https://developer.blender.org/D14593
When dragging assets into the 3D View while in any other mode than
object mode, dropping would be disabled and the cursor would indicate
that. However there was supposed to be an "Only supported in object
mode" message, that similar operators showed, but got forgotten when
this one was introduced.
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
Curves that are attached to a surface can now follow the surface when
it is modified using shape keys or modifiers (but not when the original
surface is deformed in edit or sculpt mode).
The surface is allowed to be changed in any way that keeps uv maps
intact. So deformation is allowed, but also some topology changes like
subdivision.
The following features are added:
* A new `Deform Curves on Surface` node, which deforms curves with
attachment information based on the surface object and uv map set
in the properties panel.
* A new `Add Rest Position` checkbox in the shape keys panel. When checked,
a new `rest_position` vector attribute is added to the mesh before shape
keys and modifiers are applied. This is necessary to support proper
deformation of the curves, but can also be used for other purposes.
* The `Add > Curve > Empty Hair` operator now sets up a simple geometry
nodes setup that deforms the hair. It also makes sure that the rest
position attribute is added to the surface.
* A new `Object (Attach Curves to Surface)` operator in the `Set Parent To`
(ctrl+P) menu, which attaches existing curves to the surface and sets the
surface object as parent.
Limitations:
* Sculpting the procedurally deformed curves will be implemented separately.
* The `Deform Curves on Surface` node is not generic and can only be used
for one specific purpose currently. We plan to generalize this more in the
future by adding support by exposing more inputs and/or by turning it into
a node group.
Differential Revision: https://developer.blender.org/D14864
This patch adds (selected/active) outline around a curve object in object mode.
{F13270680}
In the past the draw bounds option was enabled for any curve objects. With this
patch it isn't needed and will be disabled.
In the future the curve outline could also be enabled to improve GPU selection.
Reviewed By: dfelinto, HooglyBoogly, fclem
Maniphest Tasks: T95933
Differential Revision: https://developer.blender.org/D15308
Previous code was doing N collection syncs when duplicating N objects.
New code avoids all the intermediate syncs by using
BKE_layer_collection_resync_forbid and
BKE_layer_collection_resync_allow, and then does one
BKE_main_collection_sync + BKE_main_collection_sync_remap for the
whole operation. There is some complexity involved where the Base
things of newly duplicated objects can't be found yet, without the
sync, so some work on them (marking them selected, active, ...) has
to be deferred until after the sync.
Timings: scene with 10k cubes, each with unique mesh (Windows, VS2022
Release build, AMD Ryzen 5950X):
- Shift+D duplicate: 13.6s -> 9.2s
- Alt+D duplicate: 4.76s -> 1.53s
Reviewed By: Bastien Montagne
Differential Revision: https://developer.blender.org/D14150
Removes the following macros for scene/render frame values:
- `CFRA`
- `SUBFRA`
- `SFRA`
- `EFRA`
These macros don't add much, other than saving a few characters when typing.
It's not immediately clear what they refer to, they just hide what they
actually access. Just be explicit and clear about that.
Plus these macros gave read and write access to the variables, so eyesores like
this would be done (eyesore because it looks like assigning to a constant):
```
CFRA = some_frame_nbr;
```
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D15311
This implements the new way to attach curves to a mesh surface using
a uv map (based on the recent discussion in T95776).
The curves data block now not only stores a reference to the surface object
but also a name of a uv map on that object. Having a uv map is optional
for most operations, but it will be required later for animation (when the
curves are supposed to be deformed based on deformation of the surface).
The "Empty Hair" operator in the Add menu sets the uv map name automatically
if possible. It's possible to start working without a uv map and to attach the
curves to a uv map later on. It's also possible to reattach the curves to a new
uv map using the "Curves > Snap to Nearest Surface" operator in curves sculpt
mode.
Note, the implementation to do the reverse lookup from uv to a position on the
surface is trivial and inefficient now. A more efficient data structure will be
implemented separately soon.
Differential Revision: https://developer.blender.org/D15125
Crash happened because code could not find a valid base in current scene
after adding the object, added some checks for that.
Root of the issue was wrong assumptions in `BKE_object_add` logic, which
would pick the first valid ancestor collection in case initially
selected collection was not editable. In some case, this could pick a
collection not instanced in the current scene's view layer, leading to
not getting a valid base for the newly added object.
Addressed this by adding a new variant of `BKE_collection_object_add`,
`BKE_collection_viewlayer_object_add`, which ensures final collection is
in given viewlayer.
Dropping would pass the name of the ID to drop to the properties of the
drop operator. This would then lookup the ID by name. With linking
and/or library overrides, multiple IDs of the same name and type may
exist, which is why the session UUID should be used instead. All
operators used for dropping support this now and the drop code passes
the session UUID instead of the name.
Also see 917c096be6 and 8f79fa9c67.
Some drop operators were already using the session UUIDs. This converts
the remaining ones. The "name" property is kept working as before, since
some scripts use this.
Side-effect: The "Name" property won't show up in the Adjust Last
Operation anymore, which was the case for some of these operators, and
its value won't be remembered over multiple executions of the operator.
Both were not at all useful from what I can tell, and I doubt this was
done intentionally.
There are now some generalized helpers for passing IDs from drag & drop
to operators via operator properties, mostly introduced in 917c096be6
and 8f79fa9c67. These can be used in a bunch of places to reduce
duplicated code and explicitly share a common solution.
Side-effect: The "Name" property won't show up in the Adjust Last
Operation anymore, and its value won't be remembered over multiple
executions of the operator. Both were not at all useful from what I can
tell, and I doubt this was done intentionally.
More and more of the drop operations are being switched to use the ID's
session UUID rather than the name, but the cleanup after a drop operator
was cancelled assumed they would set the name. They will now first
attempt to use the session UUID and fallback to the name if needed.
The operators to handle object drag and drop (from the asset browser,
outliner, etc.) used the object name to find the object to add and
place. This is problematic with linking and/or library overrides, since
this may lead to multiple objects with the same name. So the wrong
object would be used by the drop operators.
Partially fixes T97320. T95706 probably needs the same fix but for
materials.
As a side-effect, the "Name" button won't show up in the Adjust Last
Operation panel anymore. This isn't really useful, and I doubt this was
ever intentionally exposed in the UI.
The operators to handle object drag and drop (from the asset browser,
outliner, etc.) used the object name to find the object to add and
place. This is problematic with linking and/or library overrides, since
this may lead to multiple objects with the same name. So the wrong
object would be used by the drop operators.
Partially fixes T97320. T95706 probably needs the same fix but for
materials.
As a side-effect, the "Name" button won't show up in the Adjust Last
Operation panel anymore. This isn't really useful, and I doubt this was
ever intentionally exposed in the UI.
This extends the existing object type conversion operator.
Currently, it is limited to converting to curves when the evaluated
source mesh actually has curves. This might not be the case when
it is converted to a mesh by some modifier during evaluation.
Differential Revision: https://developer.blender.org/D14872
Support merging UV's that share the same vertex and are very close when
applying modifiers.
This is needed to prevent UV's becoming "detached" which can happen when
applying the subdivision surface modifier.
This regression was caused by [0] which removed selection threshold for
nearby coordinates. While restoring the UV selection threshold could be
done - some selection operations that walk around connected UV fans
wouldn't behave in a deterministic way (such as select shortest path).
There are also other cases where UV's may be compared without a
threshold such as tangent calculation and exporters which have their own
logic to handling UV's.
Also resolves T86896, T89903.
[0]: b88dd3b8e7
Reviewed By: sergey
Ref D14841
The goal is to make the Add menu more convenient for the new curves object.
The following changes are done:
* Add `curves` submenu.
* Add an `Empty Hair` operator that also sets the surface object.
* Rename the old operator to `Random`. It's mostly for testing at this point.
Differential Revision: https://developer.blender.org/D14556
Makes it possible to toggle instancing via the "Adjust Last Operation"
panel after dropping a collection asset into the viewport.
A design task that puts this into more context is pending still, but
this is a useful option to have either way.
Differential Revision: https://developer.blender.org/D14507
Reviewed by: Bastien Montagne
Add new `BKE_id_is_editable` helper in `BKE_lib_id.h`, that supercedes
previous check (simple `ID_IS_LINKED()` macro) for many editing cases.
This allows to also take into account 'system override' (aka
non-editable override) case.
Ref: {T95707}.
Currently, any time a Curves data-block is created, the `curves_random`
function runs, filling it with 500 random curves, also adding a radius
attribute. This is just left over from the prototype in the initial
commit that added the type.
This commit moves the code that creates the random data to the curve
editors module, like the other primitives are organized.
Differential Revision: https://developer.blender.org/D14211
