For example , it is common for spacecraft attitude - control systems to be commanded in terms of quaternions .
For this reason , quaternions are used in computer graphics , control theory , signal processing , attitude control , physics , bioinformatics , and orbital mechanics .
It is common for spacecraft attitude - control systems to be commanded in terms of quaternions .
For this reason , quaternions are used in computer graphics , control theory , signal processing , attitude control , physics , bioinformatics , and orbital mechanics .