glPassThrough man page on SunOS

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GLPASSTHROUGH(3gl)					    GLPASSTHROUGH(3gl)

NAME
       glPassThrough - place a marker in the feedback buffer

C SPECIFICATION
       void glPassThrough( GLfloat token )

PARAMETERS
       token  Specifies	 a  marker  value  to be placed in the feedback buffer
	      following a GL_PASS_THROUGH_TOKEN.

DESCRIPTION
       Feedback is a GL render mode.  The mode is selected by  calling	glRen‐
       derMode	with  GL_FEEDBACK.  When the GL is in feedback mode, no pixels
       are produced by rasterization.  Instead, information  about  primitives
       that  would  have  been rasterized is fed back to the application using
       the GL.	See the glFeedbackBuffer reference page for a  description  of
       the feedback buffer and the values in it.

       glPassThrough inserts a user-defined marker in the feedback buffer when
       it is executed in feedback mode.	 token is returned as  if  it  were  a
       primitive;  it  is  indicated  with  its	 own unique identifying value:
       GL_PASS_THROUGH_TOKEN.	The  order  of	glPassThrough  commands	  with
       respect to the specification of graphics primitives is maintained.

NOTES
       glPassThrough is ignored if the GL is not in feedback mode.

ERRORS
       GL_INVALID_OPERATION  is generated if glPassThrough is executed between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_RENDER_MODE

SEE ALSO
       glFeedbackBuffer, glRenderMode

				   15 Mar 97		    GLPASSTHROUGH(3gl)
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