glPassThrough(3) glPassThrough(3)
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 prim-
itives that would have been rasterized is fed back to the application
using the GL. See the glFeedbackBuffer reference page for a descrip-
tion 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(3), glRenderMode(3)
glPassThrough(3)
Mac OS X 10.6 - Generated Thu Sep 17 20:20:26 CDT 2009