GLUTSPACEBALLBUTTONFUNC

Section: C Library Functions (3)
Updated: LOCAL
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NAME

glutSpaceballButtonFunc - Sets a spaceball button callback.

LIBRARY

OpenGLUT - input

SYNOPSIS

In openglut.h Ft void Fn glutSpaceballButtonFunc void( *callback )( int button int state )

PARAMETERS

Bf Em
callback Ef
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 orientation), plus buttons. The spaceball has glutDeviceGet( Bf Sy
GLUT_NUM_SPACEBALL_BUTTONS) Ef
and numbers them from 1. Button state is either Bf Sy
GLUT_UP Ef
or Bf Sy
GLUT_DOWN. Ef

The callback is bound to the Bf Li
current window Ef
.

CAVEATS

OpenGLUT does not implement spaceball support.

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