It can perhaps now be appreciated that the warping
can be calculated irrespective of the geometry of the final
display surface, the only difference is the exact warping
mesh to which the cubic map textures are applied
This warping mesh can additionally be computed for any
mirror shape but there is the advantage of simplicity and
availability of spherically shaped mirrors. Indeed, once
software has been written to support one sort of warping
then it can be used in any projection geometry, the only
difference is the description of the warping required. This
description can be stored in a data file that is unique to
each installation.