initFromQuaternion
Initializes a #graphene_euler_t using the given normalized quaternion.
If the #graphene_quaternion_t @q is null, the #graphene_euler_t will be initialized with all angles set to 0.
Return
the initialized #graphene_euler_t
Since
1.2
Parameters
q
a normalized #graphene_quaternion_t
order
the order used to apply the rotations