glutOverlayDisplayFunc - Man Page

OpenGLUT - windowcallback

#include <openglut.h>

void
glutOverlayDisplayFunc(void( *callback )( void ));

Client hook for overlay redisplay.

is invoked by OpenGLUT to refresh an overlay, if OpenGLUT thinks that this is necessary. Generally, very similar to glutDisplayFunc(), save that:

- The redisplay is triggered differently.
- OpenGLUT sets the layer for you.
- You do not need to have, and can deregister, this callback.

This callback is bound to

the


current window
and the
layer
.

OpenGLUT does not implement layers at this time.

glutDisplayFunc(3) glutPostOverlayRedisplay(3) glutEstablishOverlay(3) glutUseLayer(3)

glutDisplayFunc(3), glutPostOverlayRedisplay(3), glutPostWindowOverlayRedisplay(3).