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A metallic object has to be at least a foot or two away from the tracking area so it doesn't interfere. Metallic objects cause jitter and drift.
A metallic object has to be at least a foot or two away from the tracking area so it doesn't interfere. Metallic objects cause jitter and drift.
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==History==
==History==
Electromagnetic tracking was invented in about 1970 by [[Polhemus]]. Another company that has made electromagnetic tracking gadgets is [[Ascension Technologies]].
Electromagnetic tracking was invented in about 1970 by [[Polhemus]]. Another company that has made electromagnetic tracking gadgets is [[Ascension Technologies]].