Apply drag on local axis

Questions & Answers
1

I need to apply drag on the Y and X local axis of a rigidbody.
Now I’m doing it this way:

rigidbody.velocity *= 0.985;

I know it applies drag on all axis, but if I do it this way:

rigidbody.velocity.x *= 0.985;

It will apply drag on the X axis in world coordinates.
¿How could I apply drag on local axis?

2

There is many ways to convert from local to world coordinates (you can for it). One of the ways is multiply with object rotation like “transform.rotation * new Vector3(1, 0, 0)”