rpdr(3G)

NAME
     rpdr, rpdri, rpdrs, rpdr2, rpdr2i, rpdr2s - relative polygon draw

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

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

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

     subroutine rpdr2(dx, dy)
     real dx, dy

     subroutine rpdr2i(dx, dy)
     integer*4 dx, dy

     subroutine rpdr2s(dx, dy)
     integer*2 dx, dy

     All of the above routines are functionally the same.  They differ only in
     the type declarations for their parameters and in whether 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 next corner of the polygon.

     dy   expects the distance from the y coordinate of the current graphics
          position to the y coordinate of the next corner of the polygon.

     dz   expects the distance from the z coordinate of the current graphics
          position to the z coordinate of the next corner of the polygon.

DESCRIPTION
     rpdr is the relative version of pdr.  It specifies the next point in a
     filled polygon, using the previous point (the current graphics position)
     as the origin.  rpdr updates the current graphics position. The next
     drawing routine will start drawing from that point.

SEE ALSO
     bgnpol, endpol, pclos, rpmv, v

NOTES
     rpdr should not be used in new development.  Rather, polygons should be
     drawn using the high-performance v commands, surrounded by calls to
     bgnpol and endpol.  Matrix commands pushma, transl, and popmat should be
     used to accomplish relative positioning.
     There can be no more than 256 vertices in a polygon.  Therefore, there
     can be no more than 255 rpdr calls between rpmv and pclos.