This was an issue previously not noticed. There were two bugs:
- When an out of range index was somehow detected, line art discards the
entire stroke after the point, which causes remaining point positions
to be invalid. In fact the index should never go out of range unless
total points in the scene exceeds `size_t`.
- Line art point index is global, not local to objects, previously the
"object starting index" was not subtracted from the final point index
when transferring weights, this will lead to incorrect weight being
transferred/discarded.
Now both problems have been properly taken care of.
Pull Request: https://projects.blender.org/blender/blender/pulls/136869
3522e2bd26