The delta from Pointer<Drag> drifts away when dragging a Pickable #20372
Description
Bevy version
0.16
What you did
Dragged a Pickable.
What went wrong
The values of delta from Pointer<Drag> vs MouseMotion are different when a drag starts on Pickable.
The value via Pointer<Drag> drifts away in the direction of the drag by a constant multiplier of window.scale_factor()/3.0, i.e. the drift vanishes if the window.scale_factor is set to 3.
Additional information
I have a small demo for this, the code for which can be found here: https://github.com/yatinmaan/drag-test
Notice, in the top left, that the Diff (= drag_delta - mouse_motion) stays near zero when I drag outside the Pickable.
But when I start the drag on the Pickable the Diff accumulates error and the Scaled Diff (= drag_delta*window.scale_factor/3 - mouse motion) stays near zero.