NAME

passthrough − passes a single token through the Geometry Pipeline

SPECIFICATION

C
passthrough(token)
short token;

FORTRAN
subroutine passth(token)
integer*4 token

Pascal
procedure passthrough(token: longint);

DESCRIPTION

passthrough passes a single 16-bit integer through the Geometry Pipeline. Use it in feedback mode to parse the returned information. 

For example, if passthrough is used between every pair of points that is being transformed and clipped by the geometry engines, two passthrough routines appear in a row in the output buffer if a point is clipped out.  It is dangerous to use passthrough when not in feedback mode; it can send a random routine to the raster subsystem. 

SEE ALSO

IRIS Graphics Programming, Section 10.2, Feeback Mode

NOTE

This routine is available only in feedback mode. 

Version 2.5  —  April 22, 1987