From: Michael M. Butler (butler@comp-lib.org)
Date: Sat May 11 2002 - 11:58:45 MDT
Ah, Grasshopper! Let us reason together.
If you have the budget, you might think of using a rotating laser "plane
level". They sell for much cash at hardware stores like Home Depot, but you
might be able to hack something up with a cheap laser, a bubble level and a
rotating first surface mirror.
Keep the eye dose down.
Lower tech, you might be able to use a thrift store slide projector and a
custom slide image shining in your eyes--e.g. green light when you're in the
zone, white outside.
There will be obvious beam divergence limitations. And it is probably going to
be even more distracting than a laser beam.
Higher tech still... might involve using pupil tracking (there are some really
nifty cheap hacks out there that use a cheap monochrome camera and two
concentric arrays of synchronized IR LEDs). Computationally intensive but the
cool thing is that in principle you could also check for head tilt.
Fantasy tricky idea: stratified air, a kind of "fog layer rice paper".
Probably impractical.
Another silly idea: make a stereotactic halo and bolt it to your head,
connected to a surplus wheelchair.
What has worked best for me tcure "bobboing", no lie, is practicing while
negatively bouyant with weights in a swimming pool. Slow slow practice.
"Perfect practice makes perfect".
Seriously: Is this for solo practice or in a crowd?
Chop chop,
MMB
Brian Phillips wrote:
> I need a way to detect vertical (up and down
> motion or bobbing) on a human body that is moving
> horizontally.
--
butler a t comp - lib . o r g
I am not here to have an argument. I am here as part of a civilization.
Sometimes I forget.
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