UNTITLED LOCAL UNTITLED
glutVisibilityFunc -- Sets the Visibility callback for the current window.
OpenGLUT - deprecated
glutVisibilityFunc(void( *callback )( int status ));
callback Client hook for visibility changes.
OpenGLUT may call this function when your window's visbility status has changed. status can take on two values: GLUT_NOT_VISIBLE or
GLUT_VISIBLE . If any pixel of your window (including descendants) is visible, your window is GLUT_VISIBLE .
The callback is bound to the current window .
This is not a polling mechanism. You are only informed of transitions that OpenGLUT observes while your callback is in place.
This function appears to be superceded by glutWindowStatusFunc().
This callback is mutually exclusive of glutWindowStatusFunc().
SEE ALSO glutWindowStatusFunc(3)
Check Out this Related Man Page
glutVisibilityFunc(3GLUT) GLUT glutVisibilityFunc(3GLUT)NAME
glutVisibilityFunc - sets the visibility callback for the current window.
void glutVisibilityFunc(void (*func)(int state));
func The new visibility callback function.
glutVisibilityFunc sets the visibility callback for the current window. The visibility callback for a window is called when the visibility
of a window changes. The state callback parameter is either GLUT_NOT_VISIBLE or GLUT_VISIBLE depending on the current visibility of the
window. GLUT_VISIBLE does not distinguish a window being totally versus partially visible. GLUT_NOT_VISIBLE means no part of the window is
visible, i.e., until the window's visibility changes, all further rendering to the window is discarded.
GLUT considers a window visible if any pixel of the window is visible or any pixel of any descendant window is visible on the screen.
Passing NULL to glutVisibilityFunc disables the generation of the visibility callback.
If the visibility callback for a window is disabled and later re-enabled, the visibility status of the window is undefined; any change in
window visibility will be reported, that is if you disable a visibility callback and re-enable the callback, you are guaranteed the next
visibility change will be reported.
Mark J. Kilgard (email@example.com)
GLUT 3.7 glutVisibilityFunc(3GLUT)
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