|
Table of Contents
glPassThrough - place a marker in the feedback buffer
void
glPassThrough( GLfloat token )
- token
- Specifies a marker value to be placed in the feedback
buffer following a GL_PASS_THROUGH_TOKEN.
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.
glPassThrough is ignored if the GL is not
in feedback mode.
GL_INVALID_OPERATION is generated if glPassThrough
is executed between the execution of glBegin and the corresponding execution
of glEnd.
glGet with argument GL_RENDER_MODE
glFeedbackBuffer(3G)
,
glRenderMode(3G)
Table of Contents
|
