NAME    [Toc]    [Back]

       glPassThrough - place a marker in the feedback buffer

SYNOPSIS    [Toc]    [Back]

       void glPassThrough(
               GLfloat token );

PARAMETERS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

       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    [Toc]    [Back]

       glPassThrough() is ignored if the GL is  not  in  feedback
       mode.

ERRORS    [Toc]    [Back]

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

ASSOCIATED GETS    [Toc]    [Back]

       glGet() with argument GL_RENDER_MODE

SEE ALSO    [Toc]    [Back]

       glFeedbackBuffer(3), glRenderMode(3)



                                                glPassThrough(3G)