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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
       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(3G), glRenderMode(3G)

								 March 1, 2011

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