Blender Git Commit Log

Geometry Nodes: Enable Exposing object and collection sockets

This patch allows connecting wires for object and collection socket
types to the "Group Input" node, which exposes them to be adjusted
in the modifier.

Thanks a lot to @angavrilov for working on this. I was working on this
as well, but Alexander fixed a few more issues than I did, so his version
is here with some edits.

The patch is composed of a few different changes:
- Add code to create pointer properties in the modifier settings for
object and collection sockets, and also to draw them in the UI.
- Also search through the modifier's `IDProperty` settings to find IDs
used by the modifier.
- A bug fix in RNA_acces.c for setting pointer `IDProperty` values.
- Make pointer `IDProperty` values editable. Previously there was just
no need for this.

Differential Revision: https://developer.blender.org/D10056