%N grlin2 %F $MIR/src/grlin2.f
%D Draw a normal line
%B
      SUBROUTINE GRLIN2 (X0,Y0,X1,Y1)

 GRPCKG : plot a visible line segment in absolute coords from
 (X0,Y0) to (X1,Y1).  The endpoints of the line segment are rounded
 to the nearest integer and passed to the appropriate device-specific
 routine. It is assumed that the entire line-segment lies within the
 view surface, and that the physical device coordinates are
 non-negative.
