Re: [lojban] Re: Direction of Rotation

[Robin Lee Powell <rlpowell@digitalkingdom.org>]

On Fri, Aug 24, 2012 at 01:25:56PM +0200, selpa'i wrote:
[snip]
> Thus, since all we need to define the direction is an axis ML,
> which has an inherent orientation as mentioned above, and a point
> B *relative* to our starting orientation towards AL', {carna},
> which has both these as x2 and x3 respectively is plenty to
> express clockwise and counter-clockwise motion. carna2 will not
> need to be specified for bodies that overlap almost completely
> with the axis ML, like for instance a standing human being, and
> for objects like a disk that's lying flat on the plane, we only
> need to choose the polarity of vector ML.

The problem is that you've ignored the hard part: how to specify the
vector ML.

We have, to the best of my knowledge, no compact way to do that *at
all*.  At the end you talk about specifying only the polarity; I
don't even know how to do *that* in compact fasion.

How do you specify "rotate the monitor clockwise as viewed from the
front" versus "rotate the monitor clockwise as viewed from right
side"?

I have some possible solutions in mind, but I'd like to hear other
people's first.

-Robin


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