Quaternions for Computer Graphics

WheneventsdictatedthatIwouldpursueacareerincomputerprogramming—ratherthanelectricalengineering—Ihadnoneedforcomplexnumbers,untilMandlebrot’sworkonfractalsemerged.Butthatwasatemporaryphase,andIneverneededtoemploycomplexnumbersinanyofmycomputergraphicssoftware.Howeverin1986,whenIjo