Function copy

copy<T>(q, dst?): T
Copies a quaternion. (same as quat.clone) Also see quat.create and quat.set
Type Parameters
- T extends BaseArgType = number[]
Parameters
- q: BaseArgType
  The quaternion.
- Optional dst: T
  quaternion to hold result. If not passed in a new one is created.
Returns T
A quaternion that is a copy of q