See: https://projects.blender.org/blender/blender/issues/103343
Changes:
1. Added `BKE_node.hh` file. New file includes old one.
2. Functions moved to new file. Redundant `(void)`, `struct` are removed.
3. All cpp includes replaced from `.h` on `.hh`.
4. Everything in `BKE_node.hh` is on `blender::bke` namespace.
5. All implementation functions moved in namespace.
6. Function names (`BKE_node_*`) changed to `blender::bke::node_*`.
7. `eNodeSizePreset` now is a class, with renamed items.
Pull Request: https://projects.blender.org/blender/blender/pulls/107790
This adds support for building simulations with geometry nodes. A new
`Simulation Input` and `Simulation Output` node allow maintaining a
simulation state across multiple frames. Together these two nodes form
a `simulation zone` which contains all the nodes that update the simulation
state from one frame to the next.
A new simulation zone can be added via the menu
(`Simulation > Simulation Zone`) or with the node add search.
The simulation state contains a geometry by default. However, it is possible
to add multiple geometry sockets as well as other socket types. Currently,
field inputs are evaluated and stored for the preceding geometry socket in
the order that the sockets are shown. Simulation state items can be added
by linking one of the empty sockets to something else. In the sidebar, there
is a new panel that allows adding, removing and reordering these sockets.
The simulation nodes behave as follows:
* On the first frame, the inputs of the `Simulation Input` node are evaluated
to initialize the simulation state. In later frames these sockets are not
evaluated anymore. The `Delta Time` at the first frame is zero, but the
simulation zone is still evaluated.
* On every next frame, the `Simulation Input` node outputs the simulation
state of the previous frame. Nodes in the simulation zone can edit that
data in arbitrary ways, also taking into account the `Delta Time`. The new
simulation state has to be passed to the `Simulation Output` node where it
is cached and forwarded.
* On a frame that is already cached or baked, the nodes in the simulation
zone are not evaluated, because the `Simulation Output` node can return
the previously cached data directly.
It is not allowed to connect sockets from inside the simulation zone to the
outside without going through the `Simulation Output` node. This is a necessary
restriction to make caching and sub-frame interpolation work. Links can go into
the simulation zone without problems though.
Anonymous attributes are not propagated by the simulation nodes unless they
are explicitly stored in the simulation state. This is unfortunate, but
currently there is no practical and reliable alternative. The core problem
is detecting which anonymous attributes will be required for the simulation
and afterwards. While we can detect this for the current evaluation, we can't
look into the future in time to see what data will be necessary. We intend to
make it easier to explicitly pass data through a simulation in the future,
even if the simulation is in a nested node group.
There is a new `Simulation Nodes` panel in the physics tab in the properties
editor. It allows baking all simulation zones on the selected objects. The
baking options are intentially kept at a minimum for this MVP. More features
for simulation baking as well as baking in general can be expected to be added
separately.
All baked data is stored on disk in a folder next to the .blend file. #106937
describes how baking is implemented in more detail. Volumes can not be baked
yet and materials are lost during baking for now. Packing the baked data into
the .blend file is not yet supported.
The timeline indicates which frames are currently cached, baked or cached but
invalidated by user-changes.
Simulation input and output nodes are internally linked together by their
`bNode.identifier` which stays the same even if the node name changes. They
are generally added and removed together. However, there are still cases where
"dangling" simulation nodes can be created currently. Those generally don't
cause harm, but would be nice to avoid this in more cases in the future.
Co-authored-by: Hans Goudey <h.goudey@me.com>
Co-authored-by: Lukas Tönne <lukas@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/104924
Previously the only way to control the subtype was to remove the group
input or output and create it again. This commit adds a dropdown to
change an existing socket, for supported socket types.
Based on a patch by Angus Stanton: https://developer.blender.org/D15715
It was necessary to fix the UI code slightly; the layout's context
wasn't being used in calls to an operator's enum items callback.
Pull Request: https://projects.blender.org/blender/blender/pulls/105614
The goal is to solve confusion of the "All rights reserved" for licensing
code under an open-source license.
The phrase "All rights reserved" comes from a historical convention that
required this phrase for the copyright protection to apply. This convention
is no longer relevant.
However, even though the phrase has no meaning in establishing the copyright
it has not lost meaning in terms of licensing.
This change makes it so code under the Blender Foundation copyright does
not use "all rights reserved". This is also how the GPL license itself
states how to apply it to the source code:
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software ...
This change does not change copyright notice in cases when the copyright
is dual (BF and an author), or just an author of the code. It also does
mot change copyright which is inherited from NaN Holding BV as it needs
some further investigation about what is the proper way to handle it.
The crash is fixed by reverting 87fd798ae3 and
some follow up commits. While it would generally be nice to move to a more
SoA format for these things, we are not there yet and this is causing more
trouble than it's worth currently. The main difficulty is that the socket
indices are changed by many different operations which invalidates the array
too often and led to many follow up bugs.
Pull Request: https://projects.blender.org/blender/blender/pulls/105877
Nodes are sorted based on the selection. In some cases (even depending
on processor speed, nodes can be selected and reordered, and another
operation can run before the next redraw). That gives a window where
operators mapped to the same input as selection can run with invalid
socket locations (which aren't updated after the nodes are reordered,
since they are stored in a separate array).
To fix this, move the socket locations from the node editor runtime
data to the node tree, tag them as invalid when the nodes are
reordered, and check for that status in a few more places.
A better longer term solution is not reordering nodes based on
UI status and instead storing the UI drawing order separately.
Pull Request #104420
Add `contains_group` method in python api for `NodeTree` type, cleanup
`ntreeHasTree` function, reuse `ntreeHasTree` in more place in code.
The algorithm has been changed to not recheck trees by using set.
Performance gains from avoiding already checked node trees:
Based on tests, can say that for large files with a huge number
of trees, the response speed of opening the search menu in the
node editor increased by ~200 times (for really large projects
with 16 individual groups in 6 levels of nesting). Group insert
operations are also accelerated, but this is different in some cases.
Pull Request #104465
The reverse iteration added in e091291b5b didn't handle
the case where there are no nodes properly. Thanks to Iliya Katueshenock
for investigating this.
- Avoid calling node interface items "sockets"
- Use "active" instead of "current" to be more correct
- Avoid using the same word in description and name
- A couple grammar fixes
Socket locations are set while drawing the node tree in the editor.
They can always be recalculated this way based on the node position and
other factors. Storing them in the socket is misleading. Plus, ideally
sockets would be quite small to store, this helps us move in that
direction.
Now the socket locations are stored as runtime data of the node editor,
making use of the new node topology cache's `index_in_tree` function
to make a SoA layout possible.
Differential Revision: https://developer.blender.org/D15874
The main change is returning a socket pointer instead of using two
return arguments. Also use the topology cache instead of linked lists,
references over pointers, and slightly adjust whitespace.
- Move from blenkernel to the node editor, the only place it was used
- Use two vectors instead of ListBase
- Remove define for validating the clipboard, which shouldn't be skipped
- Comment formatting, other small cleanups to whitespace
Differential Revision: https://developer.blender.org/D16880
Use the map created for copying nodes more instead of iterating over all
nodes unnecessarily a few times. Use the map empty check instead of
a separate boolean variable. Use a utility function to retrieve a
separate buffer of selected nodes in case the nodes by id Vector
is reallocated (that part is technically a fix).
In a few places, nodes were added without updating the Identifiers and
vector. In other places nodes we removed without removing from and
rebuilding the vector. This is solved in a few ways. First I exposed
a function to rebuild the vector from scratch, and added unique ID
finding to a few places.
The changes to node group building and separating are more involved,
mostly because it was hard to see the correct behavior without some
refactoring. Now `VectorSet` is used to store nodes involved in the
operation. Some things are handled more simply with the topology
cache and by passing a span of nodes.
`done` was only used in one place, and `is_updating` was never read.
Generally we should avoid adding this sort of temporary data to longer
lived structs.
* This patch just moves runtime data to the runtime struct to cleanup
the dna struct. Arguably, some of this data should not even be there
because it's very use case specific. This can be cleaned up separately.
* `miniwidth` was removed completely, because it was not used anywhere.
The corresponding rna property `width_hidden` is kept to avoid
script breakage, but does not do anything (e.g. node wrangler sets it).
* Since rna is in C, some helper functions where added to access the
C++ runtime data from rna.
* This size of `bNode` decreases from 432 to 368 bytes.
This allows for optimizations because one does not have to iterate
over all nodes anymore to find all nodes within a frame.
Differential Revision: https://developer.blender.org/D16106
Ignore difference between source and target tree type. When copying
nodes from clipboard to target tree compatibility is checked. After
pasting nodes only the links between nodes that are existing in the
node tree are added.
See Task T95033.
Differential Revision: https://developer.blender.org/D16349
I18n: make a few messages translatable
* Missing Paths * in the Presets menu when no preset exists yet.
The White Noise entry in the Add Node menu is the only one lacking a "Texture" suffix, which doesn't seem justified since the node itself is already called "White Noise Texture". Rename the entry its name can be extracted and used for the node--and for consistency.
New object material node names (Principled BSDF, Material Output) come from a preset node tree. The nodes' names need to be translated after creation.
Extract the "Fallback Tool" pie menu title.
Translate grease pencil options in the viewport overlay menu.
Ref T102030.
Reviewed By: mont29
Differential Revision: https://developer.blender.org/D16345
When changing the texture paint slot index or activating a Texture Node, the texture displayed in the Image Editor changes accordingly.
This patch syncs the Image Editor when a new texture paint slot was added, which currently is not the case.
Also deduplicates some code.
This operator (Alt + D) allows users to explicitly create a linked copy
of a group node (same current behaviour for the Duplicate operator).
The duplicate operator (Shift + D) now takes the new User Preference
duplicate data option for Node Tree into account. It is by default
disabled, leading to no functional change for users.
Although we could make in the future make this option "on" by default,
to make it consistent with the rest of Blender we do not at the time.
Differential Revision: https://developer.blender.org/D16210
This is the conventional way of dealing with unused arguments in C++,
since it works on all compilers.
Regex find and replace: `UNUSED\((\w+)\)` -> `/*$1*/`
This adds support for showing geometry passed to the Viewer in the 3d
viewport (instead of just in the spreadsheet). The "viewer geometry"
bypasses the group output. So it is not necessary to change the final
output of the node group to be able to see the intermediate geometry.
**Activation and deactivation of a viewer node**
* A viewer node is activated by clicking on it.
* Ctrl+shift+click on any node/socket connects it to the viewer and
makes it active.
* Ctrl+shift+click in empty space deactivates the active viewer.
* When the active viewer is not visible anymore (e.g. another object
is selected, or the current node group is exit), it is deactivated.
* Clicking on the icon in the header of the Viewer node toggles whether
its active or not.
**Pinning**
* The spreadsheet still allows pinning the active viewer as before.
When pinned, the spreadsheet still references the viewer node even
when it becomes inactive.
* The viewport does not support pinning at the moment. It always shows
the active viewer.
**Attribute**
* When a field is linked to the second input of the viewer node it is
displayed as an overlay in the viewport.
* When possible the correct domain for the attribute is determined
automatically. This does not work in all cases. It falls back to the
face corner domain on meshes and the point domain on curves. When
necessary, the domain can be picked manually.
* The spreadsheet now only shows the "Viewer" column for the domain
that is selected in the Viewer node.
* Instance attributes are visualized as a constant color per instance.
**Viewport Options**
* The attribute overlay opacity can be controlled with the "Viewer Node"
setting in the overlays popover.
* A viewport can be configured not to show intermediate viewer-geometry
by disabling the "Viewer Node" option in the "View" menu.
**Implementation Details**
* The "spreadsheet context path" was generalized to a "viewer path" that
is used in more places now.
* The viewer node itself determines the attribute domain, evaluates the
field and stores the result in a `.viewer` attribute.
* A new "viewer attribute' overlay displays the data from the `.viewer`
attribute.
* The ground truth for the active viewer node is stored in the workspace
now. Node editors, spreadsheets and viewports retrieve the active
viewer from there unless they are pinned.
* The depsgraph object iterator has a new "viewer path" setting. When set,
the viewed geometry of the corresponding object is part of the iterator
instead of the final evaluated geometry.
* To support the instance attribute overlay `DupliObject` was extended
to contain the information necessary for drawing the overlay.
* The ctrl+shift+click operator has been refactored so that it can make
existing links to viewers active again.
* The auto-domain-detection in the Viewer node works by checking the
"preferred domain" for every field input. If there is not exactly one
preferred domain, the fallback is used.
Known limitations:
* Loose edges of meshes don't have the attribute overlay. This could be
added separately if necessary.
* Some attributes are hard to visualize as a color directly. For example,
the values might have to be normalized or some should be drawn as arrays.
For now, we encourage users to build node groups that generate appropriate
viewer-geometry. We might include some of that functionality in future versions.
Support for displaying attribute values as text in the viewport is planned as well.
* There seems to be an issue with the attribute overlay for pointclouds on
nvidia gpus, to be investigated.
Differential Revision: https://developer.blender.org/D15954
