The crash happened when the density in the Point Distribute node was
above zero but so small, that no point was generated. In this case, there
was a point cloud component, but the point cloud was empty, making some
attributes unavailable.
One could also make more attributes available in this case, but that can
be done separately if necessary.
I made an incorrect comment in patch review that "Location"
should be used instead of position. "Position" is more appropriate
here since it refers to generic data rather than an object origin.
"Position" is also the name we chose for the attribute for this reason.
Reflection
Anisotropic is not really supported in Eevee, but since code looks like
it is just intended to make it behave like glossy, it should function
like it too.
Seems like the internal calling from `node_bsdf_glossy` from
`node_bsdf_anisotropic` has swapped arguments.
Also: ssr_id is available for SH_NODE_BSDF_ANISOTROPIC as well (see
`ntree_tag_bsdf_cb`), so why not use it?
Maniphest Tasks: T84658
Differential Revision: https://developer.blender.org/D10547
This patch adds an output field to the Attribute Proximity node and
renames the existing string socket from "Result" to "Distance".
- The "Distance" output contains distance to the closest position
on the Target geometry.
- The new "Location" output contains the coordinates of the closest
position on the Target geometry.
A basic use case for this data is a simple shrinkwrap operation.
Differential Revision: https://developer.blender.org/D10415
An error doesn't make sense in these situations because we don't expect
to find attributes on empty geometry, and an empty geometry set is a
valid situation.
Note that we can't use `component.is_empty` here, because often the
component is visually "empty" but still has a point cloud with no
points or a mesh with no vertices.
This adds an approximation of inverted AO by reversing the max horizon
search (becoming a min horizon). The horizons are correctly clamped in
the reverse direction to the shading and geometric normals.
The arc integration is untouched as it seems to be symetrical.
The limitation of this technique is that since it is still screen-space
AO you don't get other hidden surfaces occlusion. This is more
problematic in the case of inverted AO than for normal AO but it's
better than no support AO.
Support of distance parameter was easy thanks to recent AO refactor.
This commit adds a simple string input node, intended for use in the
attribute workflow to make using the same attribute name in multiple
places easier. The node is function node similar to the existing vector
input node.
Ref T84971
Differential Revision: https://developer.blender.org/D10316
This makes the nodes look more consistent with the rest of the UI
by using the same split with right aligned labels as the property editor
and elsewhere. Additionally, for consistency, the "Type" part of some
dropdowns is removed. It already wasn't displayed everywhere, and
it gets redundant quite quickly.
Add the Simple subdivision option to Geometry nodes, as a new node
instead of part of the existing subdivision node because of future
backend changes to the Simple option. (See T85584)
https://developer.blender.org/D10409
If the axes are aligned in auto pivot mode then the rotation axis would be (0,0,0).
We now fall back to the x axis in this case. If that fails, we fall back to the y axis.
Differential Revision: https://developer.blender.org/D10466
Previously, the density was set per point. That implies that when a
point has a non-zero weight, points might be distributed in all
connected polygons. By specifying the density per corner, this
limitation is removed. Note, per-point density maps (such as vertex
groups) can still be used. They will be adapted to the corner domain
without loss of information.
Differential Revision: https://developer.blender.org/D10461
The integer mode still needs a random value in a 0 to 1 range, just like
floats. So slightly refactor to let the integer randomization use the
float implementation and then round to an int afterwards.
The `material_index` attribute can adjust which material in the list
will be applied to each face of the mesh. There are two new things
about this attribute that haven't been exposed by the attribute API yet.
Each comes with limitations:
1. Integer data type: Most attribute nodes are currently written to use
float data types. This means that they can't write to this attribute
because they can't change the type of a built-in attribute.
2. Polygon domain: This is our first attribute using the polygon domain,
meaning until some of the interpolations are implemented, some
operations may not work as expected.
Currently the two nodes that work with this attribute are Attribute Fill
and Attribute Randomize.
Differential Revision: https://developer.blender.org/D10444
This patch adds icons to the right side of nodes when they encounter a
a problem. When hovered, a tooltip displays describing the encountered
while evaluating the node.
Some examples are: attribute doesn't exist, mesh has no faces,
incorrect attribute type, etc. Exposing more messages to the system
will be an ongoing process. Multiple warnings per node are supported.
The system is implemented somewhat generically so that the basic
structure can also be used to store more information from evaluation
for the interface, like a list of available attributes.
Currently the messages are just button tooltips. They could be styled
differently in the future. Another limitation is that every instance of
a node group in a parent node tree will have the same error messages,
the "evaluation context" used to decide when to display the tooltips
must be extended to support node tree paths.
Differential Revision: https://developer.blender.org/D10290
Since the derived node tree is already build for the evaluation system,
it's simpler to pass a derived node to the params struct. This will also
allow context lookups in nested node groups for node error messages,
since the derived node has that information readily accessible.
The vertex weights were actually interpolated correctly. The issue was that
vertex group names were removed from the output geometry set. We have
to keep track of these names separately from the mesh, for legacy reasons.
Vertex group names are not stored on meshes but objects instead.
In an upcoming commit I'll also move the make-instances-real functionality
to this file. This code is not essential to working with geometry sets in general,
so it makes sense to move it to a separate header.
Getting an "ouput" attribute is equivalent to creating an attribute and
then getting a write attribute. Replace the latter with the former for
consistency with other code, and to decrease the used surface area
of the attribute API to hopefully facilitate future cleanup.
This refactor was needed for some reasons:
- closure_lit_lib.glsl was unreadable and could not be easily extended to use new features.
- It was generating ~5K LOC for any shader. Slowing down compilation.
- Some calculations were incorrect and BSDF/Closure code had lots of workaround/hacks.
What this refactor does:
- Add some macros to define the light object loops / eval.
- Clear separation between each closures which now have separate files. Each closure implements the eval functions.
- Make principled BSDF a bit more correct in some cases (specular coloring, mix between glass and opaque).
- The BSDF term are applied outside of the eval function and on the whole lighting (was separated for lights before).
- Make light iteration last to avoid carrying more data than needed.
- Makes sure that all inputs are within correct ranges before evaluating the closures (use `safe_normalize` on normals).
- Making each BSDF isolated means that we might carry duplicated data (normals for instance) but this should be optimized by compilers.
- Makes Translucent BSDF its own closure type to avoid having to disable raytraced shadows using hacks.
- Separate transmission roughness is now working on Principled BSDF.
- Makes principled shader variations using constants. Removing a lot of duplicated code. This needed `const` keyword detection in `gpu_material_library.c`.
- SSR/SSS masking and data loading is a bit more consistent and defined outside of closure eval. The loading functions will act as accumulator if the lighting is not to be separated.
- SSR pass now do a full deferred lighting evaluation, including lights, in order to avoid interference with the closure eval code. However, it seems that the cost of having a global SSR toggle uniform is making the surface shader more expensive (which is already the case, by the way).
- Principle fully black specular tint now returns black instead of white.
- This fixed some artifact issue on my AMD computer on normal surfaces (which might have been some uninitialized variables).
- This touched the Ambient Occlusion because it needs to be evaluated for each closure. But to avoid the cost of this, we use another approach to just pass the result of the occlusion on interpolated normals and modify it using the bent normal for each Closure. This tends to reduce shadowing. I'm still looking into improving this but this is out of the scope of this patch.
- Performance might be a bit worse with this patch since it is more oriented towards code modularity. But not by a lot.
Render tests needs to be updated after this.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D10390
# Conflicts:
# source/blender/draw/engines/eevee/eevee_shaders.c
# source/blender/draw/engines/eevee/shaders/common_utiltex_lib.glsl
# source/blender/draw/intern/shaders/common_math_lib.glsl
This commit adds a drop-down to the attribute randomize node to support
a few operations on the values of existing attributes: "Replace/Create"
(the existing behavior), "Add", "Subtract", and "Multiply".
At this point, the operations are limited by what is simple to implement.
More could be added in the future, but there isn't a strong use case
for more complex operations anyway, and a second math node can be used.
Differential Revision: https://developer.blender.org/D10269
Currently every attribute node assumes that the attribute exists on the
"points" domain, so it generally isn't possible to work with attributes
on other domains like edges, polygons, and corners.
This commit adds a heuristic to each attribute node to determine the
correct domain for the result attribute. In general, it works like this:
- If the output attribute already exists, use that domain.
- Otherwise, use the highest priority domain of the input attributes.
- If none of the inputs are attributes, use the default domain (points).
For the implementation I abstracted the check a bit, but in each
node has a slightly different situation, so we end up with slightly
different `get_result_domain` functions in each node. I think this makes
sense, it keeps the code flexible and more easily understandable.
Note that we might eventually want to expose a domain drop-down to some
of the nodes. But that will be a separate discussion; this commit focuses
on making a more useful choice automatically.
Differential Revision: https://developer.blender.org/D10389
This commit makes the geometry output of the collection info usable.
The output is the geometry of a collection instance, but this commit
adds a utility to convert the instances to real geometry, used in the
background whenever it is needed, like copy on write.
The recursive nature of the "realize instances" code is essential,
because collection instances in the `InstancesComponent`, might have no
geometry sets of their own containing even more collection instances,
which might then contain object instances, etc.
Another consideration is that currently, every single instance contains
a reference to its data. This is inefficient since most of the time
there are many locations and only a few sets of unique data. So this
commit adds a `GeometryInstanceGroup` to support this future optimization.
The API for instances returns a vector of `GeometryInstanceGroup`.
This may be less efficient when there are many instances, but it makes
more complicated operations like point distribution that need to iterate
over input geometry multiple times much simpler.
Any code that needs to change data, like most of the attribute nodes,
can simply call `geometry_set_realize_instances(geometry_set)`,
which will move any geometry in the `InstancesComponent` to new "real"
geometry components.
Many nodes can support read-only access to instances in order to avoid
making them real, this will be addressed where needed in the near future.
Instances from the existing "dupli" system are not supported yet.
Differential Revision: https://developer.blender.org/D10327
This updates the join node to use the new multi-input socket from D10067.
The change just requires slightly changing the arguments of the exec
function, and changing the socket input list.
Note that this commit does not contain the UI changes, it only allows for
more input links, and combines the two sockets into one. The UI changes
will come next.
Reviewed By: Hans Goudey
Differential Revision: https://developer.blender.org/D10069
