This helps to tell when a pointer is expected to be null, and avoid
overly verbose code when dereferencing. This commit also includes
a few other cleanups in this area:
- Use const in a few places
- Use `float2` instead of `float[2]`
- Remove some unnecessary includes and old code
The change can be continued further in the future.
This commit adds warning messages to "legacy" nodes that will be
removed in the future. The warning is shown in the node header, but
it is not printed in the terminal or displayed in the modifier. It is
also not propogated to node groups, but that is a more general task.
If the modifier's node tree has executed a deprecated node, it will
display a warning and a "Search" button that will select the nodes and
pan to them in the node editor. This doesn't open child node trees and
select nodes in there, because I want to keep this operator simple and
avoid wasting a lot of time perfecting this behavior.
Differential Revision: https://developer.blender.org/D12454
This just moves a couple of files in `space_node` to C++ and fixes
related errors.
The goal is to be able to use C++ data structures to simplify the code.
Differential Revision: https://developer.blender.org/D11451
