Free-form display
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A free form display is a display that can generate light from an arbitrary position that is going in an arbitrary direction.
It can generate rays of light with predetermined direction from each point in a set of points in an arbitrarily shaped structure.
It can be done using a fiber optic tip that is rotated.
It can be approximated using rasterization, where each point has a pinwheel spinny thing that sends out light on a spiral in a semisphere sequentially.
If at 100hz of frame input, it needs a fast optical switching mechanism.
Composition[edit]
A steerable beam or an effectual steerable beam is the primary component of a free-form display.