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 ioption are:
coordsys/ define /x0,y0,z0/xx,xy,xz/zx,zy,zz/ coordsys/ ioption
normal return to the normal coordinate system
save save the current coordinate system for recall
restore recall the last saved coordinate system
define define a new local coordinate system
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.