//Create a linker with a key handler, enabling you to move the camera with the WASDEFZX keys.
//If you pass null, it will not link the keys.
public Linker(I_Observable<I_KeyListener> keyHandler,Viewport3D viewport)
: this(viewport)
{
if (keyHandler != null)
{
keyHandler.addListener(keyController);
keyHandler.addListener(platform); //let the view port listen to my key events
}
}
/// <summary>
/// Tell the camera which displays the robot to listen to a particular key handler. The camera will expect AWSDEFZX command
/// keys to control its movement at the time of writing (see the ViewPlatform class for details). This is only worth
/// doing if you provided a viewport initially.
/// </summary>
/// <param name="keyHandler">The key handler that the camera should listen to.</param>
public void setCameraToListenToKeys(I_Observable<I_KeyListener> keyHandler)
{
if (keyHandler == null) throw new ArgumentException("Unexpected null key handler.");
keyHandler.addListener(platform);
}