/// <summary>
/// Sets the dial and button box dials callback for the current window.
/// </summary>
/// <param name="func">
/// The new dials callback function. See <see cref="DialsCallback" />.
/// </param>
/// <remarks>
/// <para>
/// <b>glutDialsFunc</b> sets the dial and button box dials callback for the
/// current window. The dial and button box dials callback for a window is called
/// when the window has dial and button box input focus (normally, when the mouse
/// is in the window) and the user generates dial and button box dial changes.
/// The <i>dial</i> parameter will be the dial number (starting at one). The
/// number of available dial and button box dials can be determined with
/// <c>Glut.glutDeviceGet(Glut.GLUT_NUM_DIALS)</c>. The <i>val</i> measures the
/// absolute rotation in degrees. Dial values do not "roll over" with each
/// complete rotation but continue to accumulate degrees (until the <c>int</c>
/// dial value overflows).
/// </para>
/// <para>
/// Registering a dial and button box dials callback when a dial and button box
/// device is not available is ineffectual and not an error. In this case, no
/// dial and button box dials callbacks will be generated.
/// </para>
/// <para>
/// Passing <c>null</c> to <b>glutDialsFunc</b> disables the generation of dial
/// and button box dials callbacks. When a new window is created, no dial and
/// button box dials callback is initially registered.
/// </para>
/// </remarks>
/// <seealso cref="DialsCallback" />
/// <seealso cref="glutDeviceGet" />
// GLUTAPI void APIENTRY glutDialsFunc(void (GLUTCALLBACK *func)(int dial, int value));
public static void glutDialsFunc([In] DialsCallback func) {
dialsCallback = func;
__glutDialsFunc(dialsCallback);
}
private static extern void __glutDialsFunc(DialsCallback func);