initFromVec3
Initializes a #graphene_euler_t using the angles contained in a #graphene_vec3_t.
If the #graphene_vec3_t @v 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
v
a #graphene_vec3_t containing the rotation angles in degrees
order
the order used to apply the rotations