glutSwapBuffers  - swaps the buffers of the current window
if double buffered.

glutSwapBuffers
	glutSwapBuffers() -> None

void glutSwapBuffers(void);

Performs a buffer swap on the layer in use for the current
window.   Specifically,  glutSwapBuffers promotes the con-
tents of the back buffer of the layer in use of  the  cur-
rent  window  to  become the contents of the front buffer.
The contents of the back buffer then become undefined. The
update  typically  takes place during the vertical retrace
of the monitor, rather than  immediately  after  glutSwap-
Buffers is called.

An  implicit  glFlush is done by glutSwapBuffers before it
returns.  Subsequent OpenGL commands can be issued immedi-
ately  after calling glutSwapBuffers, but are not executed
until the buffer exchange is completed.

If the layer in use  is  not  double  buffered,  glutSwap-
Buffers has no effect.

glutPostRedisplay, glutDisplayFunc

Mark J. Kilgard (mjk@nvidia.com)