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glutVisibilityFunc(3GLUT) GLUT glutVisibilityFunc(3GLUT) NAME glutVisibilityFunc - sets the visibility callback for the current win- dow. SYNTAX void glutVisibilityFunc(void (*func)(int state)); ARGUMENTS func The new visibility callback function. DESCRIPTION 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 par- tially visible. GLUT_NOT_VISIBLE means no part of the window is visi- ble, 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 visi- bility callback. If the visibility callback for a window is disabled and later re-en- abled, 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 visi- bility change will be reported. SEE ALSO glutCreateWindow, glutPopWindow AUTHOR Mark J. Kilgard (mjk@nvidia.com) GLUT 3.7 glutVisibilityFunc(3GLUT)
NAME | SYNTAX | ARGUMENTS | DESCRIPTION | SEE ALSO | AUTHOR
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