The root of the problem goes to the fact that node tree copying
uses source tree and nodes for a temporary storage.
This makes it so multiple dependency graphs can not be reliably
evaluated from different threads if they are using same original
node tree.
Solved by doing the following:
- Commonly used tree copying function (which is used by library
manager) keeps source tree, nodes and sockets untouched.
- All the related areas (like node tree's callback) now have
const qualifier on the input.
- Areas which needs to have those temporary pointers assigned are
now using explicit function.
Would be really cool to get rid of those temporary pointers
completely, but this is a bit tricky due to hairy nature of the
code. Can happen any time now though: is easy enough to generalize
the new pointers mapping.
Note that this change is only intended to solve the crash.
The fact that icons shouldn't be updated on playback will be fixed
as a separate change.
Reviewers: brecht, fclem
Reviewed By: brecht, fclem
Subscribers: brecht, fclem
Differential Revision: https://developer.blender.org/D5002
On file read we need to update group nodes in case the group they refer to
has changed its inputs and outputs. This had O(n^2) time complexity and was
updating all datablocks even if they did not change.
User counting now happens before init() and after free() methods, so that
the ID users are in a valid state when Python might modify them. ID user
counting was moved into node.c and simplified.
Patch by Miguel with further refactoring by Brecht. Ref D4370.
Nuke away old nodeCopyNode(), much better to use new BKE_node_copy_ex(),
which behaves as expected for the various optional flags that can be passed.
This also removes the need to handle ID refcounting in calling code
(ugly!) and allows us to remove an even uglier name from our codebase! :D
Note that this fixes three related issues actually, that bug was also
affecting copy/paste of nodes, and 'Separate with copy' operator (the
latter being actually fully wrong, since it was not refcounting
anything, not even node->id pointer...).
BF-admins agree to remove header information that isn't useful,
to reduce noise.
- BEGIN/END license blocks
Developers should add non license comments as separate comment blocks.
No need for separator text.
- Contributors
This is often invalid, outdated or misleading
especially when splitting files.
It's more useful to git-blame to find out who has developed the code.
See P901 for script to perform these edits.
Replaced some STREQ(snode->tree_idname, ...) calls with ED_node_is_*() calls for improved readability, fixed one case where the STREQ was used the wrong way
This patch fixes the annoyance that when creating a node group where one of its nodes is connected
to several other nodes, a separate output will be created for each link, even though they're all
connected to the same socket in the group.
Now, before adding an output for an outgoing link, the existing outputs are checked to find whether
any output is already connected to the same socket. If such an output is found, it is reused instead of
creating a new one.
Reviewers: Severin
Subscribers: Blendify
Differential Revision: https://developer.blender.org/D1836
- Add blentranslation `BLT_*` module.
- moved & split `BLF_translation.h` into (`BLT_translation.h`, `BLT_lang.h`).
- moved `BLF_*_unifont` functions from `blf_translation.c` to new source file `blf_font_i18n.c`.
Make the UI API more consistent and reduce confusion with some naming.
mainly:
- API function calls
- enum values
some internal static functions have been left for now
Operators that trigger UI events (but nothing else)
were using 'CANCELLED' making it impossible to tell if an invoke
function failed, or opened a menu.
Previously this only worked for some datablocks relevant to rendering, now it
can be used to detect if any type of datablock was added or removed (but not
yet to detect if it was modified, we need many more depsgraph tags for that).
Most of the changes are some function parameter changes, the important parts
are the DAG_id_type_tag calls.
Reviewed By: sergey, brecht
Differential Revision: https://developer.blender.org/D195
Issue was caused by ntreeUpdateTree calling for a ntree
which is not in G.main.
This lead to issues in ntreeVerifyNodes (which is called
from ntreeUpdateTree).
Made is so ntreeUpdateTree now accepts main as an argument.
Will work for the release, later we could either solve the
TODO mentioned in ntreeUpdateTree which will eliminate need
in main there or make it so context's main is used from all
over where ntreeUpdateTree is called (currently there're
still some usages of G.main).
The original rationale for adding the node_type property was to allow node group operators work generically on any node group type automatically. The problem is that detecting the appropriate node group type and node tree type to use for a group depends on using a node base type. Due to the fact that RNA does not allow multiple inheritance (mixin classes) this is impossible to achieve if node types also have to use a base type such as ShaderNode, CompositingNode or TextureNode.
The idea is now to just "make it work" by limiting the node group operators to the standard tree types. For future pynodes we can implement these operators nicely in Python, which will allow pynodes to use mixin base classes or derive their own operator types and re-use the same keymapping.
PyNodes opens up the node system in Blender to scripters and adds a number of UI-level improvements.
=== Dynamic node type registration ===
Node types can now be added at runtime, using the RNA registration mechanism from python. This enables addons such as render engines to create a complete user interface with nodes.
Examples of how such nodes can be defined can be found in my personal wiki docs atm [1] and as a script template in release/scripts/templates_py/custom_nodes.py [2].
=== Node group improvements ===
Each node editor now has a tree history of edited node groups, which allows opening and editing nested node groups. The node editor also supports pinning now, so that different spaces can be used to edit different node groups simultaneously. For more ramblings and rationale see (really old) blog post on code.blender.org [3].
The interface of node groups has been overhauled. Sockets of a node group are no longer displayed in columns on either side, but instead special input/output nodes are used to mirror group sockets inside a node tree. This solves the problem of long node lines in groups and allows more adaptable node layout. Internal sockets can be exposed from a group by either connecting to the extension sockets in input/output nodes (shown as empty circle) or by adding sockets from the node property bar in the "Interface" panel. Further details such as the socket name can also be changed there.
[1] http://wiki.blender.org/index.php/User:Phonybone/Python_Nodes
[2] http://projects.blender.org/scm/viewvc.php/trunk/blender/release/scripts/templates_py/custom_nodes.py?view=markup&root=bf-blender
[3] http://code.blender.org/index.php/2012/01/improving-node-group-interface-editing/
