Is it possible to use Unity3D from within Eclipse? I've seen that I can import a Unity3D project into Eclipse, but I cannot seem to be able to access classes such as Terrain or Ray. I don't know if that's because I haven't imported the correct libraries or if that's a limitation and that data can only be accessed by methods within Unity3D. I am designing an Android game within Eclipse and would prefer to use Eclipse than Unity3D, even if that means my game will only be available for Android.
The only real reason I'm using Unity3d is for use of the 3D terrain and to hopefully help in getting the data, such as slope, terrain type, collisions, etc.