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This implements the initial core framework for fields and anonymous
attributes (also see T91274).
The new functionality is hidden behind the "Geometry Nodes Fields"
feature flag. When enabled in the user preferences, the following
new nodes become available: `Position`, `Index`, `Normal`,
`Set Position` and `Attribute Capture`.
Socket inspection has not been updated to work with fields yet.
Besides these changes at the user level, this patch contains the
ground work for:
* building and evaluating fields at run-time (`FN_fields.hh`) and
* creating and accessing anonymous attributes on geometry
(`BKE_anonymous_attribute.h`).
For evaluating fields we use a new so called multi-function procedure
(`FN_multi_function_procedure.hh`). It allows composing multi-functions
in arbitrary ways and supports efficient evaluation as is required by
fields. See `FN_multi_function_procedure.hh` for more details on how
this evaluation mechanism can be used.
A new `AttributeIDRef` has been added which allows handling named
and anonymous attributes in the same way in many places.
Hans and I worked on this patch together.
Differential Revision: https://developer.blender.org/D12414
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The posterize node limits the number of colors per channel.
This is useful to generate masks or to generate stylized images
Both the tiled and full-frame implementation are included in this patch
{F10314012}
Reviewed By: manzanilla, jbakker
Differential Revision: https://developer.blender.org/D12304
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Previously, built-in nodes had to implement "socket templates"
(`bNodeSocketTemplate`) to tell Blender which sockets they have.
It was nice that this was declarative, but this approach was way
too rigid and was cumbersome to use in many cases.
This commit starts to move us away from this rigid structure
by letting nodes implement a function that declares the sockets
the node has. Right now this is used as a direct replacement
of the "socket template" approach to keep the refactor smaller.
It's just a bit easier to read and write.
In the future we want to support more complex features like
dynamic numbers of sockets and type inferencing. Those features
will be easier to build on this new approach.
This new approach can live side by side with `bNodeSocketTemplate`
for a while. That makes it easier to update nodes one by one.
Note: In `bNodeSocketTemplate` socket identifiers were made
unique automatically. In this new approach, one has to specify
unique identifiers manually (unless the name is unique already).
Differential Revision: https://developer.blender.org/D12335
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This node takes a curve geometry input and creates a filled mesh at Z=0
using a constrained Delaunay triangulation algorithm. Because of the
choice of algorithm, the results should be higher quality than the
filling for 2D curve objects.
This commit adds an initial fairly simple version of the node, but more
features may be added in the future, like transferring attributes when
necessary, or an index attribute input to break up the calculations
into smaller chunks to improve performance.
Differential Revision: https://developer.blender.org/D11846
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The multi-function network system was able to compose multiple
multi-functions into a new one and to evaluate that efficiently.
This functionality was heavily used by the particle nodes prototype
a year ago. However, since then we only used multi-functions
without the need to compose them in geometry nodes.
The upcoming "fields" in geometry nodes will need a way to
compose multi-functions again. Unfortunately, the code removed
in this commit was not ideal for this different kind of function
composition. I've been working on an alternative that will be added
separately when it becomes needed.
I've had to update all the function nodes, because their interface
depended on the multi-function network data structure a bit.
The actual multi-function implementations are still the same though.
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Just like the "Select by Material" node, this node outputs a
boolean attribute for control points that have a matching handle
type. By default left and right handles are considered, but it's
possible to only check one side with the toggle in the node.
Differential Revision: https://developer.blender.org/D12135
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This node sets the selected (or all) splines in curve to a chosen target
spline type. Poly, Bezier, and NURB splines can be converted to any of
the other types. This is meant to be a building block node, useful in
many procedural situations.
In the future the node could be optimized with multi-threading, or by
avoiding copying in many cases, either by retrieving the curve for write
access or by passing the raw vectors to the new splines where possible.
With edits from Hans Goudey (@HooglyBoogly)
Differential Revision: https://developer.blender.org/D12013
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This node takes a curve and a point selection and allows you to set the
specified (or all) points left/right or both handles to a given type.
Differential Revision: https://developer.blender.org/D11992
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This node implements shortening each spline in the curve based on
either a length from the start of each spline, or a factor of the
total length of each spline, similar to the "Start & End Mapping"
panel of curve properties.
For Bezier curves, the first and last control points are adjusted
to maintain the shape of the curve, but NURB splines are currently
implicitly converted to poly splines.
The node is implemented to avoid copying where possible, so it outputs
a changed version of the input curve rather than a new one.
Differential Revision: https://developer.blender.org/D11901
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This commit adds a curve primitive node for creating squares,
rectangles, trapezoids, kites, and parallelograms. It also includes
a mode where the four points are just vector inputs.
Differential Revision: https://developer.blender.org/D11665
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TBB includes in windows.h which will by
default define min/max macro's by default,
which collide with stl's min/mac functions.
this change instructs windows.h not to
add the offending macros
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Many ui features for geometry nodes need access to information generated
during evaluation:
* Node warnings.
* Attribute search.
* Viewer node.
* Socket inspection (not in master yet).
The way we logged the required information before had some disadvantages:
* Viewer node used a completely separate system from node warnings and
attribute search.
* Most of the context of logged information is lost when e.g. the same node
group is used multiple times.
* A global lock was needed every time something is logged.
This new implementation solves these problems:
* All four mentioned ui features use the same underlying logging system.
* All context information for logged values is kept intact.
* Every thread has its own local logger. The logged informatiton is combined
in the end.
Differential Revision: https://developer.blender.org/D11785
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Rename the mesh circle to "Mesh Circle", mesh line to "Mesh Line",
and mesh subdivide to "Mesh Subdivide". Previously they looked exactly
the same in the search menu, and the nodes themselves had the same
label. This is a "deep" rename that also renames internal defines and
function names to match the UI.
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This node is quite similar to the curve to points node, but creates
points for only the start and end of each spline. This is a separate
node because the sampling from the curve to points node don't apply,
and just for ease of use.
All attributes from the curves are copied, including the data for
instancing: tangents, normals, and the derived rotations. One simple
use case is to make round caps on curves by instancinghalves of a
sphere on each end of the splines.
Differential Revision: https://developer.blender.org/D11719
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This node creates a poly spline line in one of 2 modes:
- Line between two points
- Start Point, Direction, and Length
Both modes create splines with only start and endpoints.
A resample node can be used afterward to increase the point count.
Differential Revision: https://developer.blender.org/D11769
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This patch adds a very simple node that explicitly converts a float to
an int. While this may seem redundant, it would offer 2 benefits to the
current requirement to use implicit float conversions:
1. It makes the node tree's intent more clear and self-documenting
(especially if changes in the future require integer inputs).
2. It eliminates undefined behavior in current/future nodes from float
inputs by guaranteeing that the input is an integer.
The node offers a variety of rounding techniques to make it more flexible.
Differential Revision: https://developer.blender.org/D11700
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This adds a viewer node similar to the one in the compositor.
The icon in the headers of nodes is removed because it served
the same purpose and is not necessary anymore.
Node outputs can be connected to the active viewer using
ctrl+shift+LMB, just like in the compositor. Right now this collides
with the shortcut used in the node wrangler addon, which will
be changed separately.
As of now, the viewed geometry is only visible in the spreadsheet.
Viewport visualization will be added separately.
There are a couple of benefits of using a viewer node compared
to the old approach with the icon in the node header:
* Better support for nodes that have more than one geometry output.
* It's more consistent with the compositor.
* If attributes become decoupled from geometry in the future,
the viewer can have a separate input for the attribute to visualize.
* The viewer node could potentially have visualization settings.
* Allows to keep "visualization points" around by having multiple
viewer nodes.
* Less visual clutter in node headers.
Differential Revision: https://developer.blender.org/D11470
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This node has two modes: the first mode computes a circle from three
locations and a resolution. The second takes radius and resolution.
The first mode also outputs the center of the computed circle as
a vector.
Differential Revision: https://developer.blender.org/D11650
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Creates a Curve with 1 Bezier Spline from four positions (start,
start handle, end handle, end) and a resolution. The handles are
aligned and mirrored automatically. An "Offset" mode is also included
to allow specifying the handles relative to the control points.
The default settings recreate the existing default Bezier Curve in the
3D viewport add menu.
Differential Revision: https://developer.blender.org/D11648
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This patch is for a node that creates a poly spline from a
3 point quadratic Bezier. Resolution is also specified.
Curve primitives design task: T89220
Differential Revision: https://developer.blender.org/D11649
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This node creates a curve spline and gives control for the number of
rotations, the number of points per rotation, start and end radius,
height, and direction. The "Reverse" input produces a visual change,
it doesn't just change the order of the control points.
Differential Revision: https://developer.blender.org/D11609
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This patch adds a Curve Primitives menu in Geometry nodes with an
initial entry of a star primitive.
The node is a basic star pattern node that outputs a poly spline.
Options control the inner and outer radius, the number of points,
and the twist of the valleys.
Differential Revision: https://developer.blender.org/D11653
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The //Raycast// node intersects rays from one geometry onto another.
It computes hit points on the target mesh and returns normals, distances
and any surface attribute specified by the user.
A ray starts on each point of the input //Geometry//. Rays continue
in the //Ray Direction// until they either hit the //Target Geometry//
or reach the //Ray Length// limit. If the target is hit, the value of the
//Is Hit// attribute in the output mesh will be true. //Hit Position//,
//Hit Normal//, //Hit Distance// and //Hit Index// are the properties of the
target mesh at the intersection point. In addition, a //Target Attribute//
can be specified that is interpolated at the hit point and the result
stored in //Hit Attribute//.
Docs: D11620
Reviewed By: HooglyBoogly
Differential Revision: https://developer.blender.org/D11619
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This node creates splines with more control points in between the
existing control points. The point is to give the splines more
definition for further tweaking like randomization with white noise,
instead of deforming a resampled poly spline with a noise texture.
For poly splines and NURBS, the node simply interpolates new values
between the existing control points. However, for Bezier splines,
the result follows the existing evaluated shape of the curve, changing
the handle positions and handle types to make that possible.
The number of "cuts" can be controlled by an integer input, or an
attribute can be used. Both spline and point domain attributes are
supported, so the number of cuts can vary using the value from the
point at the start of each segment.
Dynamic curve attributes are interpolated to the result with linear
interpolation.
Differential Revision: https://developer.blender.org/D11421
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Implementation of T86970. This node takes a geometry input with
multiple components and outputs them by component type. Meshes,
Curves, and Point Clouds support combining multiple input instances,
while volumes will only output the first volume component input until
suitable instance realization for multiple volumes is finished.
When direct geometry instancing is implemented it will be possible to
avoid realizing instances in this node.
Differential Revision: https://developer.blender.org/D11577
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This is an implementation of T88722. It accepts a curve object and
for each spline, reverses the order of the points and all attributes.
This is more of a foundational node to support other nodes in the
future (like curve deform)
Selection takes spline domain attributes to determine which splines
are selected. If no selection is present all splines are reversed.
Differential Revision: https://developer.blender.org/D11538
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This node implements the second option of T87429, creating points
along the input splines with the necessary evaluated information
for instancing: `tangent`, `normal`, and `rotation` attributes.
All generic curve point and spline attributes are copied to the
result points as well.
The "Count" and "Length" methods are just like the current options
in the resample node, but the output is points instead of a curve.
The "Evaluated" method uses the points you see on the curve directly,
and therefore should be the fastest.
The rotation data is retrieved from a transform matrix built with the
same method that the curve to mesh node uses. The radius attribute is
divided by 10 so the points don't look absurdly huge in the viewport.
In the future that could be an option.
For the implementation, one thing that could use an improvement
is the amount of temporary allocations while resampling to evaluated
points before the final points. I expect that reusing a buffer for
each thread would give a nice improvement.
Differential Revision: https://developer.blender.org/D11539
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Prepare node for conversion to Geometry Nodes.
There should be no functional changes.
Reviewed By: HooglyBoogly
Differential Revision: https://developer.blender.org/D11506
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This commit adds a node to output the convex hull of any input geometry
as a mesh, which is an enclosing geometry around a set of points.
All geometry types are supported, besides volumes.
The code supports operating on instances to avoid copying all input
geometry before the operation. The implementation uses the same backend
as the operation in edit mode, but uses Mesh directly instead of BMesh.
Attribute transfer is not supported currently, but would be a point of
improvement for the future if it can work in a predictable way on
different geometry input types.
Differential Revision: https://developer.blender.org/D10925
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This node creates a boolean face attribute that is "true" for
every face that has the given material.
Differential Revision: https://developer.blender.org/D11324
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This commit adds a node that outputs the total length of all
evalauted curve splines in a geometry set as a float value.
Differential Revision: https://developer.blender.org/D11459
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This node is similar to the mask modifier, but it deletes the elements
of the geometry corresponding to the selection, which is retrieved as
a boolean attribute. The node currently supports both mesh and point
cloud data. For meshes, which elements are deleted depends on the
domain of the input selection attribute, just like how behavior depends
on the selection mode in mesh edit mode.
In the future this node will support curve data, and ideally volume
data in some way.
Differential Revision: https://developer.blender.org/D10748
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This node creates poly curve splines from mesh edges. A selection
attribute input allows only using some of the edges from the mesh.
The node builds cyclic splines from branchless groups of edges where
possible, but when there is a three-way intersection, the spline stops.
The node also transfers all attributes from the mesh to the resulting
control points. In the future we could add a way to limit that to a
subset of the attributes to improve performance.
The algorithm is from Animation Nodes, written by @OmarSquircleArt.
I added the ability to use a selection, attribute transferring, and
used different variable names, etc, but other than that the algorithm
is the same.
Differential Revision: https://developer.blender.org/D11265
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Prepare node for conversion to Geometry Nodes.
There should be no functional changes.
Reviewed By: JacquesLucke, LazyDodo
Differential Revision: https://developer.blender.org/D11226
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This node can change all faces that use a specific material to use a
different material. Using this node is significantly more efficient
than creating a selection from all faces with a specific material
index and then using the Material Assign node.
Ref T88055.
Differential Revision: https://developer.blender.org/D11325
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This node is similar to the Value and Vector node.
It just provides a way to use the same material in multiple nodes
without exposing it outside of a node group.
Differential Revision: https://developer.blender.org/D11305
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This adds a new Material Assign node. It can be used to change the
material used by an existing mesh or to assign a material to a mesh
that has been generated from scratch.
Differential Revision: https://developer.blender.org/D11155
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Port vector rotate node to geo attributes.
Request by @simonthommes
Reviewed By: simonthommes, HooglyBoogly
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This node generates a naturally parametarized (even length edge) poly
spline version of every spline in the input. There are two modes,
"Count", and "Length". These are similar to the same options for the
line primitive node in end points mode.
I implemented this instead of a "Sample Points" node, because for this
operation it's trivial to keep the result as a curve, which is nice
since it increases flexibility, and because it can make instancing
simpler, i.e. using the transforms of each evaluated point rather than
requiring the construction of a "rotation" attribute.
Differential Revision: https://developer.blender.org/D11173
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This node has the same functionality as the color and vector curve
mapping nodes in the shader editor. Here is works on every value for
the selected attribute, and it can also output a float value. Other
than that, the implementation is quite straightforward-- almost
completely boilerplate code.
Differential Revision: https://developer.blender.org/D10921
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This patch adds initial curve support to geometry nodes. Currently
there is only one node available, the "Curve to Mesh" node, T87428.
However, the aim of the changes here is larger than just supporting
curve data in nodes-- it also uses the opportunity to add better spline
data structures, intended to replace the existing curve evaluation code.
The curve code in Blender is quite old, and it's generally regarded as
some of the messiest, hardest-to-understand code as well. The classes
in `BKE_spline.hh` aim to be faster, more extensible, and much more
easily understandable. Further explanation can be found in comments in
that file.
Initial builtin spline attributes are supported-- reading and writing
from the `cyclic` and `resolution` attributes works with any of the
attribute nodes. Also, only Z-up normal calculation is implemented
at the moment, and tilts do not apply yet.
**Limitations**
- For now, you must bring curves into the node tree with an "Object
Info" node. Changes to the curve modifier stack will come later.
- Converting to a mesh is necessary to visualize the curve data.
Further progress can be tracked in: T87245
Higher level design document: https://wiki.blender.org/wiki/Modules/Physics_Nodes/Projects/EverythingNodes/CurveNodes
Differential Revision: https://developer.blender.org/D11091
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This is a first version of an Attribute Transfer node. It only supports two
modes for mapping attributes from one geometry to another for now.
More options are planned for the future.
Ref T87421.
Differential Revision: https://developer.blender.org/D11037
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This is a first iteration of a switch node. It can only switch between
two inputs values based on a boolean. A more sophisticated switch
node that has an integer selector will probably come later.
Currently, the geometry nodes evaluator does not support lazy evaluation
of individual inputs. Therefore, all inputs will be computed currently.
An improvement to the evaluator will be worked on separately.
Ref: T85374
Differential Revision: https://developer.blender.org/D10460
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rB8d9fd0427dd6 added the `WITH_GMP` definition but did not append the
include paths.
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This commit adds a simple node to output the min and max of an
axis-aligned bounding box for the input geometry, as well a rectangular
prism mesh created from these values for convenience.
The initial use case for this node is a "bounding box boolean", where
doing the boolean with just a bounding box could be signigicantly
faster, for cases like cutting a hole in a wall for a window. But it's
easy to imagine other cases where it could be useful.
This node supports mesh and point cloud data right now, volume support
will come as a separate patch. Also note that there is plenty of room
to improve the performance of this node through parallelization.
Differential Revision: https://developer.blender.org/D10420
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Doing this, because it might make it easier to replace the implementation
of `bNodeInstanceHash`.
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This is an implementation of Enhanced Subpixel Morphological Antialiasing (SMAA)
The algorithm was proposed by:
Jorge Jimenez, Jose I. Echevarria, Tiago Sousa, Diego Gutierrez
This node provides only SMAA 1x mode, so the operation will be done with no spatial
multisampling nor temporal supersampling. See Patch for comparisons.
The existing AA operation seems to be used only for binary images by some other nodes.
Using SMAA for binary images needs no important parameter such as "threshold", so we
perhaps can switch the operation to SMAA, though that changes existing behavior.
Notes:
1. The program code assumes the screen coordinates are DirectX style that the
vertical direction is upside-down, so "top" and "bottom" actually represent bottom
and top, respectively.
Thanks for Habib Gahbiche (zazizizou) to polish and finalize this patch.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D2411
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