“…In 2012, Kovács [41] gave a new derivation of the Euler-Rodrigues formula based on a matrix transformation of three continuous rotations. In the same year, Pujol [15,42] investigated the relation between the composition of rotations and the product of quaternions [43] and related the work to Cayley's early contribution [11,44] through Euler-Rodrigues parameters. Following various studies, the use of the Euler-Rodrigues formula and of the Euler-Rodrigues-parameters formulated unit-quaternion has been extended to a broad range of research topics including vector parameterization of rotations [33,40,45], rational motions [46][47][48][49], motion generation [50][51][52] and planning [53], kinematic mapping [54,55], orientation [56] and attitude estimation [57][58][59], mechanics [60], constraint analysis [61,62], reconfiguration [63,64], mechanism analysis [65][66][67] and synthesis [68,69], sensing [70] and computer graphics [71][72][73] and vision [74].…”