Floor navigation mode
From Solid Graphics Wiki
The floor navigation mode is setting of a Window3D class object which affects how object view's camera is moved in pan and rotate interaction modes.
In the floor navigation mode during interaction with view using the mouse - the view's camera moves in a plane parallel to defined floor plane during panning the camera, and during rotating the camera the up direction camera's vector is kept in direction of floor plane's normal vector.
When floor navigation mode is off during interaction with view using the mouse - the view's camera moves in a plane perpendicular to camera's looking direction during panning the camera, and during rotating the camera the up direction camera's vector can be tilted freely in all directions.
A Window3D class object can be set to the floor navigation mode by calling Window3D::SetFloorNavigationMode method and providing a "floor plane" definition to the method (for example the plane's normal vector and a point belonging to the plane). When the Window3D::SetFloorNavigationMode method is called with floor plane information set to NULL the floor navigation mode is turned off.
See Also
