  We obtain a construction of the total spherical perspective with ruler,
compass, and nail. This is a generalization of the spherical perspective of
Barre and Flocon to a 360 degree field of view. Since the 1960s, several
generalizations of this perspective have been proposed, but they were either
works of a computational nature, inadequate for drawing with simple
instruments, or lacked a general method for solving all vanishing points. We
establish a general setup for anamorphosis and central perspective, define the
total spherical perspective within this framework, study its topology, and show
how to solve it with simple instruments. We consider its uses both in freehand
drawing and in computer visualization, and its relation with the problem of
reflection on a sphere.
