The issue was that the `offset` in `dst_span[offset]` was out of bounds
when the domain size is 0. The fix is to simply skip copying attributes
in that case.
Use transform matrices instead of loc, rot, scale variables to store instance transforms.
Reviewed By: JacquesLucke
Differential Revision: http://developer.blender.org/D10211
Hans noticed that these dirty flags are only used for normals currently
and that the edge flag is not used at all. This patch still applies the
"entire" fix with all four flags.
Differential Revision: https://developer.blender.org/D10193
By design the modified object transformations should still work and
affect the geometry nodes results. The current behaviour, however, would
make the geometry from the object info to not be affected by the
modified object transformations. This patch changes that by default.
In a similar fashion the Location, Rotation and Scale sockets outputs
should be aware of whether the output should be in the global space or in the
space of the nodetree.
To solve this, the patch introduces a new transformation space "enum"
where users can pick "Original" or "Relative" space.
Original
--------
Output the geometry relative to the input object transform, and the
location, rotation and scale relative to the world origin.
Relative
--------
Bring the input object geometry, location, rotation and scale into the
modified object maintaining the relative position between the two objects in
the scene.
Relative space violates a bit the design of the nodetree. The geometry in this
case is transformed so that moving the modified object doesn't interfere with
the geometry. This is particularly useful for the boolean node for instance.
"Original" is the default space, but old files are set to "Relative" for
backwards compatibility.
Differential Revision: https://developer.blender.org/D10124
This implements the node tree update function, which is needed so that the
reroutes get updated to the correct type. It is based on the same code in
the shader and compositor node trees.
Differential Revision: https://developer.blender.org/D10123
This commit adds the ability to provide a default value to
`attribute_try_get_for_output` and uses it for the `Point Scale` node,
which is important because the node uses multiplication.
The idea is to keep "name-specific" functionality in nodes rather than in
the attribute API, otherwise the complexity will be hard to keep track of.
So this fix doesn't apply to the Attribute Vector Math node, but hopfully
that is okay since that's now a lower level node for this purpose anyway.
Differential Revision: https://developer.blender.org/D10115
This fixes the behavior of some nodes when the same attribute
name is used for input and output. If both attributes have a
different type, they can't exist at the same time. Therefore,
the input attribute has to be removed in order to create the
output attribute.
Previously, the input attribute was remove before it was used
in any computations. Now, the output is written to a temporary
buffer and only later saved in the geometry component. This
allows both attributes to coexist within the node.
The temporary attribute is only create when necessary. The
normal case without name collisions still works the same
as before.
Differential Revision: https://developer.blender.org/D10109
Ref T83793.
The other output types did not work currently anyway.
There is not a significant benefit in somehow deducing the output
attribute type from the existing attribute types.
The translate node moves every point in the geometry, and the scale
node multiplies the "scale" attribute of the input geometry by its input.
While these operations are already possible with the "Attribute" nodes,
these new nodes fit nicely with the nodes specifically for changing the
"rotation" attribute that already exist, and they provide a simpler way
to do the same thing.
Differential Revision: https://developer.blender.org/D10100
This greatly simplifies the Point Distribute node. For a poisson disk
distribution, it now uses a simpler dart throwing variant. This results
in a slightly lower quality poisson disk distribution, but it still
fulfills our requirements: have a max density, minimum distance input
and stability while painting the density attribute.
This new implementation has a number of benefits over the old one:
* Much less and more readable code.
* Easier to extend with other distribution algorithms.
* Easier to transfer more attributes to the generated points later on.
* More predictable output when changing the max density and min distance.
* Works in 3d, so no projection on the xy plane is necessary.
This is related to T84640.
Differential Revision: https://developer.blender.org/D10104
In order to avoid losing information, it sometimes makes sense for the
output attribute type to depend on the types of the input attributes.
Such a function already exists, `attribute_data_type_highest_complexity`,
it just needs to be used in a few more places. The change for the attribute
compare node is just so the code there uses the same code style as in the
attribute mix node.
Addresses part of T83793
Differential Revision: https://developer.blender.org/D10099
This adds a new Align Rotation to Vector node based on the mockup
in T83669.
Reviewers: HooglyBoogly, simonthommes
Differential Revision: https://developer.blender.org/D10081
Previously, the span returned by `WriteAttribute`s might not contain the
current value of the attribute for performance reasons. To avoid some
bugs, the span now always contains the old values (they might have to
be copied over from the internal storage, dependending on how the
attribute is stored).
The old behavior is still available with the `get_span_for_write_only`
method. The span that it returns might not contain the current
attribute values. Therefore, it should only be used when you want
to overwrite an attribute without looking at the old values.
This patch implements the same operations and interface as the regular
vector math node, but it runs for every element of the attribute. This
should expand what's possible with geometry nodes quite a bit.
Differential Revision: https://developer.blender.org/D9914
This patch makes the point distribute node write to the "rotation"
attribute with the normal of each face at each distributed point.
The "normal" attribute is also created with the triangle normal
at each point.
The conversion from the triangle normal to an Euler rotation is somewhat
arbitrary, since we only have one direction vector. For a more flexible
rotation for each point, the "Align Rotation to Vector" node can be used
in the future.
Differential Revision: https://developer.blender.org/D9965
Instances are created with an "index" parameter used for persistence over
time through animation. Currently the geometry nodes instancer passes
the index in the array for this value, but the arrays created by the
"Point Distribution" node aren't necessarily stable in this way when
the input mesh is deformed. In D9832 we already mostly solved this
problem with an `id` attribute. The solution here is to create instances
with this attribute as well.
It's important to note that deforming the instanced points *after*
distribution will usually be a better solution for this problem. This
solution is likely still important though.
Differential Revision: https://developer.blender.org/D10024
This bug exposes some ugliness in the implementation in poisson disk
distribution implementation with likely incorrect resizing of vectors and
some other assumptions. However, a simple quick fix is to return early
when the input mesh has no faces. This makes sense anyway because
there is no surface to scatter on.
This node updates the "rotation" attribute on points.
Multiple ways to specify the rotation are supported.
Differential Revision: https://developer.blender.org/D9883
Ref T83668.
T83989 observes that the Attribute Math node always adds its
operands regardless of its operator setting. This was caused
by an oversight committed in rB23233fcf056e42, which overlooked
adjusting the exec function to use the new storage location.
Differential Revision: https://developer.blender.org/D9909
This uses the "id" attribute to randomly pick instances from a collection
for each point.
There is one issue. When the collection is updated (e.g. when an object is
added to it), the nodes modifier is not automatically updated. It seems
like we don't have the infrastructure to support this dependency yet.
The same issue exists in the Boolean modifier and with collision collections.
This should be solved separately soonish.
When "Whole Collection" is disabled, one direct child of the input collection
is instanced at each point. A direct child can be an object or a collection.
Currently, all objects are picked approximately equally often. In the future,
we will provide more control over which point gets which instance.
Differential Revision: https://developer.blender.org/D9884
Ref T82372.
Since creating the attribute node, a helper function has been added to
automatically get the input attribute or a constant value, depending on
the "input type" values for the node. This commit replaces the specific
implementation of that behavior with the new helper function.
The versioning is necessary since the node now has a "storage" struct.
This patch adds two related nodes, a node for separating points
and mesh vertices based on a boolean attribute input, and a node
for creating boolean attributes with comparisons.
See the differential for an example file and video.
Point Separate (T83059)
The output in both geometries is just point data, contained in the mesh
and point cloud components, depending which components had data in the
input geometry. Any points with the mask attribute set to true will be
moved from the first geometry output to the second. This means that
for meshes, all edge and face data will be removed. Any point domain
attributes are moved to the correct output geometry as well.
Attribute Compare (T83057)
The attribute compare does the "Equal" and "Not Equal" operations by
comparing vectors and colors based on their distance from each other.
For other operations, the comparison is between the lengths of the
vector inputs. In general, the highest complexity data type is used
for the operation, and a new function to determine that is added.
Differential Revision: https://developer.blender.org/D9876
Currently, the random attribute node doesn't work well for most
workflows because for any change in the input data it outputs
completely different results.
This patch adds an implicit seed attribute input to the node, referred
to by "id". The attribute is hashed for each element using the CPPType
system's hash method, meaning the attribute can have any data type.
Supporting any data type is also important so any attribute can be
copied into the "id" attribute and used as a seed.
The "id" attribute is an example of a "reserved name" attribute,
meaning attributes with this name can be used implicitly by nodes like
the random attribute node. Although it makes it a bit more difficult
to dig deeper, using the name implicitly rather than exposing it as an
input should make the system more accessible and predictable.
Differential Revision: https://developer.blender.org/D9832
The size of the nodes is not enough to give enough context to users what
the sockets are about.
Minimum Distance -> Distance Min
Maximum Density -> Distance Min
Note this does not handle doversion. That means users will have to
manually.
This adds a boolean attribute and custom data type, to be used in the
point separate node. It also adds it as supported data types in the
random attribute and attribute fill nodes.
There are more clever ways of storing a boolean attribute that make
more sense in certain situations-- sets, bitfields, and others, this
commit keeps it simple, saving those changes for when there is a proper
use case for them. In any case, we will still probably always want the
idea of a boolean attribute.
Differential Revision: https://developer.blender.org/D9818
This patch does two things:
* Introduce a Seed to the random distribution method
* Bring in a new distribution method for the point scattering node
Patch Review: https://developer.blender.org/D9787
Note: This commit doesn't not handle doversion. Which means that users
need to manually update their files that were using the Point Distribute
node and reconnect inputs to the "Maximum Density" socket.
Original patch by Sebastian Parborg, with changes to not rely on the cy
libraries and overall cleanup.
Patch review by Jacques Lucke, besides help with the new "heap" system
that was required for this algorithm.
Based on Cem Yuksel. 2015. Sample Elimination for Generating Poisson Disk
Sample. Sets. Computer Graphics Forum 34, 2 (May 2015), 25-32
http://www.cemyuksel.com/research/sampleelimination/
Remove DNA headers, using forward declarations where possible.
Also removed duplicate header, header including it's self
and unnecessary inclusion of libc system headers from BKE header.
The Point Instance node can instance entire collections now.
Before, only individual collections were supported.
Randomly selecting objects from the collection on a per point basis
is not support, yet.
Last part of D9739.
Ref T82372.
This node can be used to mix two attributes in various ways.
The blend modes are the same as in the MixRGB shader node.
Differential Revision: https://developer.blender.org/D9737
Ref T82374.
This commit adds a node that fills every element of an attribute
with the same value. Currently it supports float, vector, and color
attributes. An immediate use case is for "billboard" scattering.
Currently people are using the same input to a Random Attribute node's
min and max input to fill every element of a vector with the same value,
which is an unintuitive way to accomplish the same thing.
Differential Revision: https://developer.blender.org/D9790
This is a non-functional change. The functionality introduced in this commit
is not used in master yet. It is used by nodes that are being developed in
other branches though.
This just makes sure that the mesh coming out of the subdivision
surface node has correct normals. Ideally, we would lazily compute
derived data like normals in more cases, but that can be solved later.
Correctness is more important right now.
In order to solve this better, it would be nice if functions like
`BKE_mesh_ensure_normals` would take a `const Mesh *`.
The mesh could be considered to be logically const, because
normals are derived data that is only cached for the current
state of the mesh.
