3D Navigation -- SpaceNavigator

turlif 投稿 "3Dconnexion introduced the SpaceNavigator, a 3D navigation device with powerful navigation control. The SpaceNavigator is a companion to a mouse, held in the other hand. It allows a user to simultaneously pan, zoom and rotate 3D objects, which is not possible with a mouse and keyboard alone. It is possible to fly through a 3D world without stopping to use the keyboard or mouse to change directions. SpaceNavigator is compatible with most 3D design application as well as Google Earth and Google SketchUp."