Next: 7.11 glutSpaceballRotateFunc Up: 7 Callback Registration Previous: 7.9 glutSpecialFunc

## 7.10 glutSpaceballMotionFunc

`glutSpaceballMotionFunc` sets the Spaceball motion callback for the current window.

Usage

    void glutSpaceballMotionFunc(void (*func)(int x, int y, int z));

`func`
  The new entry callback function.

Description

`glutSpaceballMotionFunc` sets the Spaceball motion callback for the current window. The Spaceball motion callback for a window is called when the window has Spaceball input focus (normally, when the mouse is in the window) and the user generates Spaceball translations. The `x`, `y`, and `z` callback parameters indicate the translations along the X, Y, and Z axes. The callback parameters are normalized to be within the range of -1000 to 1000 inclusive.

Registering a Spaceball motion callback when a Spaceball device is not available has no effect and is not an error. In this case, no Spaceball motion callbacks will be generated.

Passing `NULL` to `glutSpaceballMotionFunc` disables the generation of Spaceball motion callbacks. When a new window is created, no Spaceball motion callback is initially registered.

Next: 7.11 glutSpaceballRotateFunc Up: 7 Callback Registration Previous: 7.9 glutSpecialFunc