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Manual Reference Pages  - GLPASSTHROUGH (3G)

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glPassThrough - place a marker in the feedback buffer

CONTENTS

C Specification
Parameters
Description
Notes
Errors
Associated Gets
See Also

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)

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