Q. What is an important aspect of navigation in virtual reality systems?

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Q. How does the move from mice to 3D devices impact degrees of freedom?

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Q. What type of controls are often used in PC games and desktop virtual reality?

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Q. How do users manipulate virtual controls in PC games and desktop virtual reality?

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Q. What is a characteristic of users in PC games and desktop virtual reality systems?

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Q. What is a 3D mouse?

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Q. How many degrees of freedom does a 3D mouse have?

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Q. What are the methods used to track the position and orientation of a 3D mouse?

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Q. What potential issue can users experience when using a 3D mouse?

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Q. What is a dataglove?

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Q. What advantage does the dataglove offer as an input device?

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Q. What are the two purposes of helmets or goggles worn in some VR systems?

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Q. How is head tracking used in VR systems?

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Q. What is the analogy used to explain the relationship between head direction and movement in VR systems?

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Q. How do some VR systems track whole-body movement?

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Q. What is a potential advantage of using image-processing techniques for whole-body tracking?

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Q. What is the future of tracking techniques in VR systems?

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Q. What effects are used to create a 3D impression in desktop VR?

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Q. How can 3D images be viewed over the World Wide Web?

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Q. What is stereoscopic vision?

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