xfpt(3G)

NAME
     xfpt, xfpti, xfpts, xfpt2, xfpt2i, xfpt2s, xfpt4, xfpt4i, xfpt4s -
     multiplies a point by the current matrix in feedback mode

FORTRAN SPECIFICATION
     subroutine xfpt(x, y, z)
     real x, y, z

     subroutine xfpti(x, y, z)
     integer*4 x, y, z

     subroutine xfpts(x, y, z)
     integer*2 x, y, z

     subroutine xfpt2(x, y)
     real x, y

     subroutine xfpt2i(x, y)
     integer*4 x, y

     subroutine xfpt2s(x, y)
     integer*2 x, y

     subroutine xfpt4(x, y, z, w)
     real x, y, z, w

     subroutine xfpt4i(x, y, z, w)
     integer*4 x, y, z, w

     subroutine xfpt4s(x, y, z, w)
     integer*2 x, y, z, w

PARAMETERS
     x   expects the x coordinate of a point.

     y   expects the y coordinate of a point.

     z   expects the z coordinate of a point.  Used only by the 3-D and 4-D
         versions of the routines; 0.0 is assumed by the others.

     w   expects the w coordinate of a point Used only by the 4-D version of
         the routines; 1.0 is assumed by the others.

DESCRIPTION
     xfpt multiplies the specified point (x, y, 0.0, 1.0), (x, y, z, 1.0), or
     (x, y, z, w) by the current matrix in the Geometry Pipeline.  The 4-D
     result is not clipped or scaled, and is placed in the feedback buffer.

SEE ALSO
     Graphics Library Programming Guide, Feedback Mode
NOTES
     This routine is available only in feedback mode; otherwise it is ignored.

     This routine functions only on IRIS-4D B and G models, and we advise
     against its use for new development.

     The processor can access full words only on full-word boundaries.  xfpt
     does not guarantee such alignment.  See the Graphics Library Programming
     Guide, Feedback Mode, for information on successful alignment.