centos man page for glutgetmodifiers

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NAME
     glutGetModifiers -- Returns the status of Alt, Shift, and Ctrl keys.

LIBRARY
     OpenGLUT - inputstate

SYNOPSIS
     #include <openglut.h>

     int
     glutGetModifiers(void);

DESCRIPTION
     According to which, if any, modifier keys are held, the return value is the logical  OR  combination of any of the following symbolic bit-
     masks:

      -  GLUT_ACTIVE_SHIFT
      -  GLUT_ACTIVE_CTRL
      -  GLUT_ACTIVE_ALT

     E.g., if the shift key is held, and no other modifier keys are held, this function will return  GLUT_ACTIVE_SHIFT.

BUGS
     Complains if not invoked by a client callback.

     Does not differentiate between the left and right forms of the modifiers.

SEE ALSO
     glutSetOption(3) glutGet(3) glutDeviceGet(3) glutLayerGet(3)

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