Fundamental issue is that the attribute api returns none, because
the custom data api returns null for a layer when the size of 0.
This should be improved separately.
To avoid Cycles not showing any hair by default, and to avoid very slow render
due to many overlaps with the previous 1 meter default in the node.
Fixes T97584, T99319
Differential Revision: https://developer.blender.org/D15405
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
Extends current functionality which was only filling in
the active movie clip. Now we also pre-fill tracking object
name, as well as (plane)track name.
The tooltips added for shader nodes in D15309 are very helpful already.
This commit makes a few tweaks to make them more consistent, concise,
and includes some fixes. Note that this might move some descriptions
further away from the wording in the manual.
* Make wording more concise
* Start fewer new sentences
* Use "For Example" slightly less
* Avoid repeating the node's name unnecessarily
* Spelling/grammar fixes
* Don't capitalize some words
* Use consistent verb conjugation
* Use ASCII characters/more common quote symbols
* Corrections to information
* Plural/singular corrections
* "smoke domains" -> "volume grids"
* Fix tooltip for separate and combine color nodes
* Refer to color sockets as colors rather than "images"
* Avoid "advice" in a few places, which should be left for the manual
* Remove information for sockets and could be in their tooltips
* Avoid referring to the locations of a property in the UI
* Avoid manual newlines (mostly reserve for "Note:")
* Leave UI code in control of wrapping, which is more consistent
* Add some information
* That the UV map and color attribute nodes use a default
* That Voronoi is "based on the distance to random points"
* Add "(Deprecated)" to old color combine and separate nodes
Differential Revision: https://developer.blender.org/D15381
Pre-fills movie clip from the scene to the following nodes:
- Keying Screen
- Plane Track Deform
- Track Position
The rest of tracking related nodes were already doing so.
Differential Revision: https://developer.blender.org/D15377
This commit moves the subdivide curve node implementation to the
geometry module, changes it to work on the new curves data-block,
and adds support for Catmull Rom curves. Internally I also added
support for a curve domain selection. That isn't used, but it's
nice to have the option anyway.
Users should notice better performance as well, since we can avoid
many small allocations, and there is no conversion to and from the
old curve type.
The code uses a similar structure to the resample node (60a6fbf5b5)
and the set type node (9e393fc2f1). The resample curves node can be
restructured to be more similar to this soon though.
Differential Revision: https://developer.blender.org/D15334
If you remove the default font from the project, the node will not
have the selected font. In this case, there is no check that the font
does not exist. This suggestion adds an error message if the font
is not specified.
Differential Revision: https://developer.blender.org/D15337
This is the start of a geometry node to do edge, vertex, and face
bevels.
It doesn't yet do anything but analyze the "Vertex cap" around
selected vertices for vertex bevel.
The number of points in the source curve was needed, but the offset
(just zero) was passed instead. It's unclear how this worked before.
A mistake in the recent commit 9e393fc2f1.
Also use a common utility for retrieving the sizes of curves
in ranges instead of reimplementing it for this file.
This is clearer about what is actually happening (VArray is small
enough to be a by-value type and is constructed on demand, while
only the generic virtual array is stored).
The node had incorrect handling of instance attributes. For the instance
component, instead of using the instance domain over the point domain,
it just looked through instances recursively when retrieving attributes.
We never want to do that, since we only work on one geometry at a time.
Instead, just switch out the instance domain for the point domain like
the set position node.
In "size" voxel resolution mode, calculating the bounds of the mesh to
volume node's input mesh isn't necessary. For high poly this can take
a few milliseconds, so this commit skips the calculation unless we need
it for the "Amount" mode.
Differential Revision: https://developer.blender.org/D15324
This commit adds new Unwrap and Pack Islands nodes, with equivalent
functionality to the existing Unwrap and Pack Islands operators. The
Unwrap node uses generic boolean attributes to determine seams instead
of looking at the seam flags in the mesh geometry.
Unlike the Unwrap operator, the Unwrap node doesn't perform aspect
ratio correction, because this is trivial for the user to implement
with a Vector Math node if it is desired.
The Unwrap node implicitly performs a Pack Islands operation upon
completion, because the results may not be generally useful otherwise.
This matches the behaviour of the Unwrap operator.
The nodes use the existing Vector socket type, and do not introduce a
new 2D Vector type (see T92765).
Differential Revision: https://developer.blender.org/D14389
This adds a Mesh To Volume Node T86838 based on the existing modifier.
The mesh to volume conversion is implemented in the geometry module,
and shared between the node and the modifier.
Currently the node outputs a grid with the name "density". This may
change in the future depending on the decisions made in T91668.
The original patch was by Kris (@Metricity), further implementation
by Geramy Loveless (@GeramyLoveless), then finished by Erik Abrahamsson
(@erik85).
Differential Revision: https://developer.blender.org/D10895
Using Light output is supported in Cycles. This patch adds support for it
and remove the crash in `ntree_shader_weight_tree_invert()` by treating
it as any other outputs.
Candidate for 3.2.1 corrective release.
As described in T98943, this commit adds a node that can
evaluate a field on a separate domain in a larger field context.
This is potentially useful in many cases, to avoid relying on
a separate capture attribute node, which can make it easier
to build reusable fields that don't need geometry inputs.
Internally, the node just evaluates the input field in the larger
field context and then uses the generic domain interpolation,
so the code is simple. One future optimization might be using
the input selection to only evaluate part of the input field, but
then the selection has to be interpolated as well, and that might
not always be worth it.
Differential Revision: https://developer.blender.org/D15289
This node takes a point count,a vector field, and float field and creates
a pointcloud with n points at the positions indicated in the vector
field with the radii specified in the float field.The node is placed in
the "Point" menu.
Differential Revision: https://developer.blender.org/D13920
Maniphest Task: https://developer.blender.org/T93044
In the cases where length is zero, we simply equally distribute the
value based on the control point/curve index.
Differential Revision: https://developer.blender.org/D15285
This applies the same optimization as b8bd304bd4 to the separate
color node. I observed about a 50% improvement with 10 million values
when only extracting one channel-- from about 17ms to 11ms.
We store various lazily calculated caches on meshes, some of which
depend on the vertex positions staying the same. The current API to
invalidate these caches is a bit confusing. With an explicit set of
functions modeled after the functions in `BKE_node_tree_update.h`,
it becomes clear which function to call. This may become more
important if more lazy caches are added in the future.
Differential Revision: https://developer.blender.org/D14760
One case of copying image formats was not properly using BKE_image_format_copy.
To fix this for existing .blend file we need to do versioning, ensuring the curve
mapping is properly copied.
Eevee rendered an empty image for aov nodes that weren't linked to
any other nodes. When connected the result was OK. The root cause was
that the AOV nodes were not marked as output node and pruned when not
connected to any other nodes. The pruning process is there to reduce
the complexity of the GLSL and improve compilation time and
execution time.
This speeds up the node ~20% in common cases, e.g. when only the
X axis is used. The main optimization comes from not writing to memory
that's not used afterwards anymore anyway.
The "optimal code" for just extracting the x axis in a separate loop was
not faster for me. That indicates that the node is bottlenecked by
memory bandwidth, which seems reasonable.
This commit adds a Volume Cube primitive node. It outputs a volume that
contains a single "density" float grid. The density per voxel can be
controlled with a field that depends on the voxel position (using the
existing Position node). Other field inputs are not supported.
The density field is evaluated on every voxel.
Possible future improvements are listed in D15198.
Differential Revision: https://developer.blender.org/D15198
This patch adds a 'Intersecting Edges' output with a boolean selection
that only gives you the new edges on intersections.
Will work on a couple of examples next, this should make some
interesting effects possible (including getting us closer to the "bevel-
after-boolean-usecase")
To achieve this, a Vector is passed to `direct_mesh_boolean` when the
iMesh is still available (and intersecting edges appended), then from
those edge indices a selection will be stored as attribute.
Differential Revision: https://developer.blender.org/D15151
The comparison between dot products of each point of the poly were
not taking into consideration negative values. FLT_MIN was used rather
than -FLT_MAX due to a misunderstanding of the FLT_MIN definition.
Maniphest Tasks: T98718
Differential Revision: https://developer.blender.org/D15161
