Implementation of the transform action for grease pencil frames, which enables translating and scaling grease pencil frames in the dopesheet.
This patch adds the following in the grease pencil API :
- `move_frames` to move a set of frames given a map of key transformations (with overwrite), and
- the structure `LayerTransformData` that stores in the layer runtime some useful data for the frames transformation.
Co-authored-by: Falk David <falk@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/110743
The `TD_NOTCONNECTED` flag is not set in all cases.
In some cases, such as Meshes, the `FLT_MAX` value better determines
when the `TrasData` is not "connected".
Therefore, this commit removes the `TD_NOTCONNECTED` flag and adapts
the code to rely on the `FLT_MAX` value instead.
These TrasDatas shouldn't even be created in these cases.
