glPassThrough(3gl)

1GLPASSTHROUGH(3G)                                            GLPASSTHROUGH(3G)
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NAME

6       glPassThrough - place a marker in the feedback buffer
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C SPECIFICATION

10       void glPassThrough( GLfloat token )
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PARAMETERS

14       token  Specifies  a  marker  value  to be placed in the feedback buffer
15              following a GL_PASS_THROUGH_TOKEN.
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DESCRIPTION

18       Feedback is a  GL  render  mode.   The  mode  is  selected  by  calling
19       glRenderMode  with  GL_FEEDBACK.   When  the GL is in feedback mode, no
20       pixels are produced by rasterization.  Instead, information about prim‐
21       itives  that  would have been rasterized is fed back to the application
22       using the GL.  See the glFeedbackBuffer reference page for  a  descrip‐
23       tion of the feedback buffer and the values in it.
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25       glPassThrough inserts a user-defined marker in the feedback buffer when
26       it is executed in feedback mode.  token is returned as  if  it  were  a
27       primitive;  it  is  indicated  with  its  own unique identifying value:
28       GL_PASS_THROUGH_TOKEN.   The  order  of  glPassThrough  commands   with
29       respect to the specification of graphics primitives is maintained.
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NOTES

32       glPassThrough is ignored if the GL is not in feedback mode.
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ERRORS

35       GL_INVALID_OPERATION  is generated if glPassThrough is executed between
36       the execution of glBegin and the corresponding execution of glEnd.
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ASSOCIATED GETS

39       glGet with argument GL_RENDER_MODE
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