passthrough(3G)						       passthrough(3G)

NAME    [Toc]    [Back]

     passthrough - passes a single token through the Geometry Pipeline

C SPECIFICATION    [Toc]    [Back]

     void passthrough(token)
     short token;

PARAMETERS    [Toc]    [Back]

     token   expects an	integer	which is used to mark specific sections	in
	     input data	so that	when it	is returned from the feedback buffer
	     the data is easier	to decipher.

DESCRIPTION    [Toc]    [Back]

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

     For example, you can use passthrough between every	pair of	points that is
     being transformed and clipped by the Geometry Engines. If a point is
     clipped out, two passthrough tokens appear	in a row in the	output buffer.

NOTE    [Toc]    [Back]

     This routine is available only in feedback	mode; otherwise	it is ignored.


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