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GLPASSTHROUGH(3G)			  OpenGL Manual 			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(), glRenderMode()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014				GLPASSTHROUGH(3G)
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