rpdr(3G)

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

C SPECIFICATION
     void rpdr(dx, dy, dz)
     Coord dx, dy, dz;

     void rpdri(dx, dy, dz)
     Icoord dx, dy, dz;

     void rpdrs(dx, dy, dz)
     Scoord dx, dy, dz;

     void rpdr2(dx, dy)
     Coord dx, dy;

     void rpdr2i(dx, dy)
     Icoord dx, dy;

     void rpdr2s(dx, dy)
     Scoord 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
     bgnpolygon, endpolygon, 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
     bgnpolygon and endpolygon.  Matrix commands pushmatrix, translate, and
     popmatrix 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.