Caused by b08301c865. This also contains an optimization
compared to the previous version to avoid recalculating normals when
the entire mesh has moved by the same offset.
Reported by Demeter in chat.
This adds a new mirror image extension type for shaders and
geometry nodes (next to the existing repeat, extend and clip
options).
See D16432 for a more detailed explanation of `wrap_mirror`.
This also adds a new sampler flag `GPU_SAMPLER_MIRROR_REPEAT`.
It acts as a modifier to `GPU_SAMPLER_REPEAT`, so any `REPEAT`
flag must be set for the `MIRROR` flag to have an effect.
Differential Revision: https://developer.blender.org/D16432
This is essentially a left-over from the initial transition to fields where this was
forgotten. The mesh primitive nodes used to create a named uv map attribute
with a hard-coded name. The standard way to deal with that in geometry nodes
now is to output the attribute as a socket instead. The user can then decide
to store it as a named attribute or not.
The benefits of not always storing the named attribute in the node are:
* Improved performance and lower memory usage when the uv map is not
used.
* It's more obvious that there actually is a uv map.
* The hard-coded name was inconsistent.
The versioning code inserts a new Store Named Attribute node that
stores the uv map immediatly. In many cases, users can probably just
remove this node without affecting their final result, but we can't
detect that.
There is one behavior change which is that the stored uv map will be
a 3d vector instead of a 2d vector which is what the nodes originally created.
We could store the uv map as 2d vector inthe Store Named Attribute node,
but that has the problem that older Blender versions don't support this
and would crash immediately. Users can just change this to 2d vector
manually if they don't care about forward compatibility.
There is a plan to support 2d vectors more natively in geometry nodes: T92765.
This change breaks forward compatibility in the case when the uv map
was used.
Differential Revision: https://developer.blender.org/D16637
This allows choosing the 2d vector type in the Store Named Attribute
node. Similar to byte-colors, there is not a special socket type for this
(currently). In geometry nodes itself, vectors are all still 3d.
Recently a new geometry node for splitting edges was added in D16399.
However, there was already a similar implementation in mesh.cc that was
mainly used to fake auto smooth support in Cycles by splitting sharp
edges and edges around sharp faces.
While there are still possibilities for optimization in the new code,
the implementation is safer and simpler, multi-threaded, and aligns
better with development plans for caching topology on Mesh and other
recent developments with attributes.
This patch removes the old code and moves the node implementation to
the geometry module so it can be used in editors and RNA. The "free
loop normals" argument is deprecated now, since it was only an internal
optimization exposed for Cycles.
The new mesh `editors` function creates an `IndexMask` of edges to
split by reusing some of the code from the corner normal calculation.
This change will help to simplify the changes in D16530 and T102858.
Differential Revision: https://developer.blender.org/D16732
Adds an early return if Position/Offset inputs won't lead
to any changes in the Geometry.
It now also compares with the read-only Position attribute instead of
getting it for write only, to work correctly with Copy-on-Write.
Before, the `is_same`-check only worked for geometry created
in the node tree.
Differential Revision: https://developer.blender.org/D16738
Improve a few messages, but mostly fix typos in many areas of the UI.
See inline comments in the differential revisiion for the rationale
behind the various changes.
Differential Revision: https://developer.blender.org/D16716
Add preferred domain based on the "Value" input field. Most often,
the domain must match the original domain for the value.
Differential Revision: https://developer.blender.org/D16730
This allows using the "On Cage" feature in edit mode to interact with
original mesh elements via the newly created geometry. The original
indices are only set for new elements that copy attribute values
from original elements directly, so it can also be a helpful way
to visualize attribute propagation.
The change was simplified by refactoring the individual mode slightly
to create separate index maps for the new edges and vertices. That
simplified attribute copying a bit too.
This is partially a bug fix, since the original index layer wasn't
handled at all before, and could be left initialized. That was caused
by my recent change to modify a mesh in place rather than create a
new one. Also copy over any orco data, which was another unhandled
layer type.
It's also a new feature though, since it allows using the "On Cage"
feature of edit mode to adjust original mesh elements by selecting
the new ones. This brings the functionality inline with the Edge Split
modifier.
OpenVDB likes to crash even in release builds when volumes become too small.
To fix this I used the same function that we use in other places already to
determine if the resulting volume will be too small.
The Blur Attribute node mixes values of neighboring elements in meshes and curves.
Currently it supports points, edges and faces on meshes and points on curves.
In theory, support for face corners could be added, but useful semantics are not
obvious yet.
The node calculates a weighted average of each element with its neighbors (based
on curve/mesh topology). The weight of the element itself is always 1, and the weight
of the neighbor elements is controlled by the weight input socket. In the future,
more options for how different elements are weight can be added (e.g. smoothing
groups and selection).
The node can perform multiple blurring iterations to achieve a blurrier result.
Generally, it is better to do multiple iterations in one node instead of using
multiple blur nodes because it has better performance in the current implementation.
We use the term "Blur" (instead of "Smooth") because smoothing is generally more
related to removing roughness from surfaces. When viewing the result of the
Blur Attribute node in the viewport, it looks like an image is blurred. While the
node can also be used to smooth surfaces, other/better algorithms exists for that
purpose (which e.g. don't reduce the volume of the mesh to zero with too many
iterations).
Differential Revision: https://developer.blender.org/D13952
Avoid using an incremented "loop index" variable which makes the whole
data-filling necessarily sequential. No functional changes expected,
this just simplifies some refactors to face corner storage.
The existing `DisjointSet` data structure only supports single
threaded access, which limits performance severely in some cases.
This patch implements `AtomicDisjointSet` based on
"Wait-free Parallel Algorithms for the Union-Find Problem"
by Richard J. Anderson and Heather Woll.
The Mesh Island node also got updated to make use of the new data
structure. In my tests it got 2-5 times faster. More details are in 16653.
Differential Revision: https://developer.blender.org/D16653
Before rBa8a454287a27, edge creases were copied to the result mesh as
part of `MEdge`. Now they are stored in a separate `CD_CREASE` layer,
which I mistakenly disabled for interpolation. However, to maintain
the geometry node uses a field input, remove the interpolated attribute
there.
**Empty Slot Fix**
Currently the boolean modifier transfers the default material from
meshes with no materials and empty material slots to the faces on the
base mesh. I added this in a2d59b2dac9e for the sake of consistency,
but the behavior is actually not useful at all. The default empty
material isn't chosen by users, it just signifies "nothing," so when
it replaces a material chosen by users, it feels like a bug.
This commit corrects that behavior by only transferring materials from
non-empty material slots. The implementation is now consistent between
exact mode of the boolean modifier and the geometry node.
**Index-Based Option**
"Index-based" is the new default material method for the boolean
modifier, to access the old behavior from before the breaking commit.
a2d59b2dac9e actually broke some Boolean workflows fundamentally, since
it was important to set up matching slot indices on each operand. That
isn't the cleanest workflow, and it breaks when materials change
procedurally, but historically that hasn't been a problem. The
"transfer" behavior transfers all materials except for empty slots,
but the fundamental problem is that there isn't a good way to specify
the result materials besides using the slot indices.
Even then, the transfer option is a bit more intuitive and useful for
some simpler situations, and it allows accessing the behavior that has
been in 3.2 and 3.3 for a long time, so it's also left in as an option.
The geometry node doesn't get this new option, in the hope that we'll
find a better solution in the future.
Differential Revision: https://developer.blender.org/D16187
**Empty Slot Fix**
Currently the boolean modifier transfers the default material from
meshes with no materials and empty material slots to the faces on the
base mesh. I added this in a2d59b2dac9e for the sake of consistency,
but the behavior is actually not useful at all. The default empty
material isn't chosen by users, it just signifies "nothing," so when
it replaces a material chosen by users, it feels like a bug.
This commit corrects that behavior by only transferring materials from
non-empty material slots. The implementation is now consistent between
exact mode of the boolean modifier and the geometry node.
**Index-Based Option**
"Index-based" is the new default material method for the boolean
modifier, to access the old behavior from before the breaking commit.
a2d59b2dac9e actually broke some Boolean workflows fundamentally, since
it was important to set up matching slot indices on each operand. That
isn't the cleanest workflow, and it breaks when materials change
procedurally, but historically that hasn't been a problem. The
"transfer" behavior transfers all materials except for empty slots,
but the fundamental problem is that there isn't a good way to specify
the result materials besides using the slot indices.
Even then, the transfer option is a bit more intuitive and useful for
some simpler situations, and it allows accessing the behavior that has
been in 3.2 and 3.3 for a long time, so it's also left in as an option.
The geometry node doesn't get this new option, in the hope that we'll
find a better solution in the future.
Differential Revision: https://developer.blender.org/D16187
The node transferred position once as a generic attribute, and then set
the values again manually. This wastes processing during the attribute
transfer step. On a 1 million face grid, I observed roughly an 8%
improvement, from 231.5 to 217.1 ms average and 225.4 to 209.6 ms min.
It's helpful to have these topology maps standardized and organized
a bit better so they can be optimized and considered for future caching
together. Also use a more standard name for the map for that purpose.
As described in T101948, this commit changes socket name to be more
consistent with other nodes that generate instances output.
Differential Revision: https://developer.blender.org/D16394
Change name to make navigation easier for beginner users. This should
more clearly hint at the use of this node to change the full geometry,
and not work with fields, and makes the name more consistent.
Differential Revision: https://developer.blender.org/D16396
While implementing T102289, I noticed that this node has
several solutions that are different from other, newer nodes.
- Explicitly set default values
- Use references
- Reduce the size of the node settings structure
Differential Revision: https://developer.blender.org/D16548
Instead of creating a new mesh from scratch, modify an existing mesh.
This allows us to keep derived caches for triangulation and bounds
alive more easily, and allows keeping materials and non-generic
attributes like vertex groups alive on the mesh.
It also has other performance benefits, since face and face corner
attributes aren't affected at all, and because of reduced overhead
from not allocating a new mesh.
Updating edge attributes is a bit more complicated now, since we
have to completely replace the arrays but keep the existing attribute
IDs around. The new mesh update tag is also slightly too specific IMO.
But I think both of those things will improve in the future because
of existing plans for further refactoring these areas:
- New attribute storage that gives pointer stability
- Further use and granularity of mesh update tagging that will
make the correct API more clear
Fixes T102711
Differential Revision: https://developer.blender.org/D16615
The main goal here is to move towards more self contained node
definitions. Previously, one would have to change `blenkernel` to
add a new node which is not necessary anymore. There is no need
for all these register functions to "leak out" of the nodes module.
Differential Revision: https://developer.blender.org/D16612
`GeometrySet::has()` can return an empty component. It's more convenient
if it doesn't, since other code rarely wants to access an empty component.
The alternative would be adding an `is_empty()` check in the lazy function
for the viewer node, that would work fine too, for this case.
Differential Revision: https://developer.blender.org/D16584
