rdr(3G)

NAME
     rdr, rdri, rdrs, rdr2, rdr2i, rdr2s - relative draw

FORTRAN 77 SPECIFICATION
     subroutine rdr(dx, dy, dz)
     real dx, dy, dz

     subroutine rdri(dx, dy, dz)
     integer*4 dx, dy, dz

     subroutine rdrs(dx, dy, dz)
     integer*2 dx, dy, dz

     subroutine rdr2(dx, dy)
     real dx, dy

     subroutine rdr2i(dx, dy)
     integer*4 dx, dy

     subroutine rdr2s(dx, dy)
     integer*2 dx, dy

     All of the above routines are functionally the same.  They differ only in
     the type declarations of their parameters and whether or not they assume
     a two- or three-dimensional space.

PARAMETERS
     dx   expects the distance from the x coordinate of the current graphics
          position to the x coordinate of the new point.

     dy   expects the distance from the y coordinate of the current graphics
          position to the y coordinate of the new point.

     dz   expects the distance from the z coordinate of the current graphics
          position to the z coordinate of the new point.
DESCRIPTION
     rdr is the relative version of draw.  It connects the current graphics
     position and a point, at the specified distance, with a line segment
     using the current linestyle, linewidth, color (if in depth-cue mode, the
     depth-cued color is used), and writemask.  The system updates the current
     graphics position to the new point.

     Do not place routines that invalidate the current graphics position
     within sequences of relative moves and draws.

SEE ALSO
     bgnlin, endlin, popmat, pushma, rmv, transl, v

NOTE
     rdr should not be used in new development.  Rather, lines should be drawn
     using the high-performance v commands, surrounded by calls to bgnlin and
     endlin.  Matrix commands pushma, transl, and popmat should be used to
     accomplish relative positioning.