pub fn apply_delta(
world: &mut GameWorld,
delta: GizmoDelta,
starts: &[(EntityId, GizmoTransform)],
)Expand description
Writes a drag’s result back onto every entity it started with.
The delta is world-space and Transform is parent-relative, so a child of
a moved or rotated parent is manipulated in its parent’s frame rather than
the world’s. Correct for the root entities that make up almost every
selection; reparenting-aware manipulation is a separate piece of work.