glutMouseFunc  -  sets  the mouse callback for the current
       window.

SYNTAX

       void glutMouseFunc(void (*func)(int button, int state,
                          int x, int y));

ARGUMENTS

       func      The new mouse callback function.

DESCRIPTION

       glutMouseFunc sets the mouse callback for the current win-
       dow. When a user presses and releases mouse buttons in the
       window, each press and  each  release  generates  a  mouse
       callback. The button parameter is one of GLUT_LEFT_BUTTON,
       GLUT_MIDDLE_BUTTON, or GLUT_RIGHT_BUTTON. For systems with
       only two mouse buttons, it may not be possible to generate
       GLUT_MIDDLE_BUTTON callback. For  systems  with  a  single
       mouse  button,  it  may  be  possible  to  generate only a
       GLUT_LEFT_BUTTON callback. The state parameter  is  either
       GLUT_UP  or  GLUT_DOWN indicating whether the callback was
       due to a release or press respectively. The x and y  call-
       back  parameters  indicate the window relative coordinates
       when the mouse button state changed. If a GLUT_DOWN  call-
       back  for  a specific button is triggered, the program can
       assume a GLUT_UP callback for the same button will be gen-
       erated  (assuming  the  window  still has a mouse callback
       registered) when the mouse button is released even if  the
       mouse has moved outside the window.

       If  a  menu  is  attached  to a button for a window, mouse
       callbacks will not be generated for that button.

       During a mouse callback, glutGetModifiers may be called to
       determine  the state of modifier keys when the mouse event
       generating the callback occurred.

       Passing NULL to glutMouseFunc disables the  generation  of
       mouse callbacks.

SEE ALSO

       glutKeyboardFunc, glutMotionFunc, glutSpaceballButtonFunc,
       glutButtonBoxFunc, glutTabletButtonFunc, glutGetModifiers

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)