glPassThrough

GLPASSTHROUGH(3G)					    GLPASSTHROUGH(3G)



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
       glRenderMode  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 applica-
       tion 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(3G), glRenderMode(3G)



							    GLPASSTHROUGH(3G)