Taxonomy

According the way we perform the change of system control, these techniques are divided in four categories.

• GUI based system - the most frequent solution to reach the change of system control. Using menu and others GUI instruments, we can invoke a change or to influence some settings, that we need at given time. This method is widely used in 2D desktop applications. In virtual environment we implemented 1D menu, 2D and 3D GUI. Each have advantages and also disadvantages.
• Voice command - system is driven by commands that result from voice recognition process.
• Gestural interaction - uses gesture recognition made i.e. for fingers position or hand motion.
• Tool - may be either physical or virtual. Physical tools take e.g. the form of pedal or wheel, logical tools mostly in graphical form, offer many different solutions (virtual avatars of physical tools or specific tools for motion, fly etc.)

Naturally, we can use any combination of these techniques to improve interaction with VE application, because , depending on concrete situation, each technique may be more useful then others.