cough https://github.com/davidar/tensor https://github.com/davidar/tensor also https://matrix.org/docs/projects/client/quaternion https://matrix.org/docs/proje

cough https://github.com/davidar/tensor https://github.com/davidar/tensor also https://matrix.org/docs/projects/client/quaternion https://matrix.org/docs/projects/client/quaternion O:-)