Travel is a conceptual technique that consists in the movement of the viewpoint (virtual eye, virtual camera) from one ___location to another. This orientation is usually handled in immersive virtual environments by [[head tracking]].
ExistsThere exists five types of travel interaction techniquestechnique:
* '''Physical movement''': uses the user's body motion to move through the virtual environment. IsThis is an appropriate technique when isyou requiredneed an augmented perception of the feeling of being present, or when isthe user needs to requireddo physical effort formfor thea usersimulation.
* '''Manual viewpoint manipulation''': the user's hands movements determine the displacementaction onin the virtual environment. One example could be when the user moves their hands in a way that seems like isthey are grabbing a virtual rope, and pullsthen hispulls selfthemself up. This technique could be easy to learn and efficient, but can cause fatigue.
* '''Steering''': the user has to constantly indicate wherein what direction to move. IsThis is a common and efficient technique. One example of this areis the gaze-directed steering, where the head orientation determines the direction of travel.
* '''Target-based travel''': the user specifies a destination point, and the systemviewpoint effectuatesmoves to the displacementnew ___location. This travel can be executed by teleport, where the user is instantly moved to the destination point, or, the system can execute some stream of transition movementmovements to the destiny. These techniques are very simple from the user's point of view, because hethey only hashave to indicate the destination.
* '''Route planning''': the user specifies the path that should be taken through the environment, and the system executes the movement. The user may draw a path on a map of the virtual environment to plan a route. This technique allows users to control travel, while they have the ability to do other tasks during motion.
