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CentOS 7.0 - man page for glutdisplayfunc (centos section 3)

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UNTITLED				      LOCAL					 UNTITLED

NAME
     glutDisplayFunc -- Sets the Display callback for the current window.

LIBRARY
     OpenGLUT - windowcallback

SYNOPSIS
     #include <openglut.h>

     void
     glutDisplayFunc(void( *callback )( void ));

PARAMETERS
      callback	   Client function for normal redisplay event.

DESCRIPTION
     Sets the display callback for the	current window	.  All windows, including subwindows,
     must   have a display callback registered.  OpenGLUT will call the  callback  function when-
     ever it thinks that the window may require updating.

     This callback is bound to the  current window  .

CAVEATS
     Unlike most callbacks, it is illegal to try to disable the display callback by setting it to
      NULL  .

     Multiple redisplays may be coalesced into a single event for invoking the	callback  only
     once.

SEE ALSO
     glutPostRedisplay(3) glutOverlayDisplayFunc(3)

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