quat_angle_between Function

public function quat_angle_between(p, q) result(angle)

Returns the angle between two unit quaternions

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=rp),	intent(in),		dimension(4)	::	p	Unit quaternion.
real(kind=rp),	intent(in),		dimension(4)	::	q	Unit quaternion.

Return Value real(kind=rp)

Angle in radian.