This node outputs true when geometry nodes is currently evaluated
for the viewport and false for final renders.
Ref T85277.
Differential Revision: https://developer.blender.org/D10302
Implements a node to get collection objects.
These objects are then passed along as instances in the node tree.
Follow up tasks:
Multiple nodes does not support instancing yet: T85159
Changing collection offset does not trigger a refresh: T85274
Reviewed By: Jacques, Dalai, Hans
Differential Revision: http://developer.blender.org/D10151
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.
This adds the ability to use all the math operations in the regular
utility "Math" node. The code is quite similar to the attribute vector
math node, with the simplification that the result is always a float.
Differential Revision: https://developer.blender.org/D10199
Use transform matrices instead of loc, rot, scale variables to store instance transforms.
Reviewed By: JacquesLucke
Differential Revision: http://developer.blender.org/D10211
This implements a new geometry node based on T84606.
It is the first node that generates a `VolumeComponent`.
Differential Revision: https://developer.blender.org/D10169
This just implements a todo with a utility function that didn't exist
at the time. For example, if one geometry has a "scale" attribute with
a float type and another has a "scale" attribute with a vector type,
the vector type will be used for the resulting geometry.
Differential Revision: https://developer.blender.org/D10206
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
We will need to expand this node soon to add weight/count for different
elements inside the collection. For that it is better to have the node
to use its own DNA.
This node allows sampling a texture for every vertex based on some
mapping attribute. Typical attribute names are the name of a uv map
(e.g. "UVMap") and "position". However, every attribute that can be
converted to a vector implicitly is supported.
It should be noted that as of right now, uv map attributes can only be
accessed after a Point Distribute node.
Ref T82584.
Differential Revision: https://developer.blender.org/D10121
For the most part, this just adds boilerplate code for volume support in geometry nodes:
* Add `VolumeComponent` next to `MeshComponent`, etc.
* Support `VolumeComponent` in depsgraph object iterator.
Furthermore, I added initial volume support in a few nodes:
* The Object Info node outputs an object instance when the input is a volume object
(that will be the same for mesh objects soonish, to avoid copies).
* Support transforming a `VolumeComponent` in the Transform node.
* Support the `VolumeComponent` in Join Geometry nodes, but only when just one of the
inputs has a volume component for now.
Right now, there is no way to create a `VolumeComponent`, because the Object Info node
outputs an object instance. The `VolumeComponent` will be necessary for upcoming nodes,
which will generate volumes on the fly.
Viewport selection does not work correctly with `VolumeComponent`s currently. I don't
know why that is. That can be figured out a bit later, once we can actually create
new volumes in geometry nodes.
Ref T84604.
Differential Revision: https://developer.blender.org/D10147
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
If the mesh has any corner or point attributes (e.g. vertex weights or
uv maps), those attributes will now be available on the generated points
as well.
Other domains can be supported as well. I just did not implement those yet,
because we don't have a use case for them.
Differential Revision: https://developer.blender.org/D10114
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
