glPassThrough: place a marker in the feedback buffer.
C Specification |
Associated Gets |
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.
- Specifies a marker value to be placed in the feedback buffer following a
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
glPassThrough is ignored if the GL is not in feedback mode.
glGet with argument
- GL_INVALID_OPERATION is generated if glPassThrough is executed between
the execution of glBegin and the
corresponding execution of glEnd.