| System
Modification |
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| • | New
Input Devices Require New Events |
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| • | New
Hardware Requires New Device Drivers |
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| – | Examples:
Transparent HMD, more accurate |
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| positioning
device |
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| • | User
Interfaces |
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| – | May change with new technology requiring
and update |
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| in
the UI Manager |
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| • | Calibration |
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| – | May
become fully automated with newer technology |
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