The data flow to the VisualServer of current and previous transforms is essential for allowing correct interpolation. An optimization was present that disabled sending transforms when nodes were hidden, however this meant that when unhidden, nodes would interpolate incorrectly from the last transform received when hiding, rather than the up to date previous transform.
This PR disables the optimization and sends always sends transforms when a node is interpolated.
When switching emission on and off, processing was always being switched on and off using internal_process, which was incorrect for using physics interpolation (where physics_process is the relevant one).
This PR correctly updates the process mode according to whether physics interpolation is being used.
This allows for lower field of view (or higher zoom) in orthogonal
and frustum camera modes.
The property hint also allows setting the size with greater precision.
For this reason, this PR binds the mesh merging functionality.
It also slightly modifies the calling from RoomManager to use a Vector of Node *, in order to allow binding of the function. - lawnjelly - cf1b3fdd55
