Operating system: Linux
Graphics card: -
Broken: 2.79b, 2.80, 2.81 Alpha 2019-08-26
Short description of the bug
Apply Transforms > Rotation to Deltas, does ADD the current rotation values to the existing delta transforms
For Quaternions that should MULTIPLY with the current delta value. Due to the fact that it adds it,
it results in a different transform after that operation.
Also Rotation to Deltas does entirely fail for Axis Angle rotation representation.
Exact steps for others to reproduce the error
Start with the default startup file and rotate the cube randomly.
Set the rotation representation to Quaternion or Axis Angle.
Press Ctrl+A and select Rotation to Deltas.
The Cube now has a messed up non unit quaternion in the transform deltas
or nothing changed at all for the axis-angle case.