Motion tracking
Main types
- Mechanical
- Usually a mechanical arm attached to the tracked object
- Very accurate, short lag, but restict movement
- Electromagnetic [ Image ]
- Measures strength of magentic fields in coils attached to objects
- Fast, short lag, but often prone to interference
- Limited range
- Optical
- Typically, pulsating LEDs monitored by a camera at a fixed position
- Fast, reasonably short lag, but often prone to interference caused by ambient lighting conditions
- Line of sight problems
- Acoustic
- Use ultrasound waves to measure position and orientation
- Slow and often imprecise
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