// transformed = original * transform + postshift
vector AnglesTransform_Multiply_GetPostShift(vector sf0, vector st0, vector t1, vector st1);
vector AnglesTransform_PrePostShift_GetPostShift(vector sf, vector t, vector st);
// transformed = original * transform + postshift
vector AnglesTransform_Multiply_GetPostShift(vector sf0, vector st0, vector t1, vector st1);
vector AnglesTransform_PrePostShift_GetPostShift(vector sf, vector t, vector st);