Multiframe copy paste operations were prohibited by a block of code.
While this is understandable as it prevents confusing actions, there is a good use case to allow multiframe copy pasting.
This patch does:
- remove restricting block of code
- adds outer loops for frames both in copy and paste actions.
In copy action it will create an array of selected strokes from all selected frames
In paste action it will create new from previous copy action merged to a single frame. It will paste to all selected frames and create new frame if autokey is on and time cursor is not on any of the keyframes.
The main usecase is for creating motion smears as in examples attached. The user still need to do some actions in order to achieve desired look, such as stroke ordering and deleting excessive strokes.
{F14069747}
{F14069743}
Reviewed By: antoniov, mendio
Differential Revision: https://developer.blender.org/D16805
a5d4c63e86