__COORDSYS__
This routine defines a local coordinate system to be in effect
until another coordinate system is defined or the normal coordinate system
is reset. The new coordinate system is defined by specifying an origin,
a point on the new x-z plane and a point on the new z-axis. These points
are specified in the normal coordinate system. The options available in
iopt
are:
**define** define a new local coordinate
system

**normal** return to the normal coordinate system

**save** save the current coordinate system for
recall

**restore** recall the last saved coordinate
system

FORMAT:
**coordsys**/iopt/x0,y0,z0/xx,xy,xz/zx,zy,zz

where x0,y0,z0 is
the location of the new origin, xx,xy,xz
is a point on the new x-z plane and zx,zy,zz
is a point on the new z-axis. These points are defined with the normal
coordinate system, and used only with the **define**
option.