centos man page for glutspaceballbuttonfunc

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NAME
     glutSpaceballButtonFunc -- Sets a spaceball button callback.

LIBRARY
     OpenGLUT - input

SYNOPSIS
     #include <openglut.h>

     void
     glutSpaceballButtonFunc(void( *callback )( int button, int state ));

PARAMETERS
      callback	   Client spaceball button hook.

DESCRIPTION
     This function registers a callback for a spaceball to report buttons.  A spaceball has six axes of freedom (three of motion and three of ori-
     entation), plus buttons.  The spaceball has glutDeviceGet(  GLUT_NUM_SPACEBALL_BUTTONS)  and numbers them from 1.	Button state is either
     GLUT_UP  or  GLUT_DOWN.

     The callback is bound to the  current window  .

CAVEATS
     OpenGLUT does not implement spaceball support.

     In contrast, mouse buttons are numbered from 0 in the GLUT API.  This is a wrinkle.

SEE ALSO
     glutSpaceballRotateFunc(3) glutSpaceballMotiononFunc,(3)

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