From: Paulo Drummond ptdrumm@terra.com.br To: squeakland@squeakland.org, Subject: Re: [Squeakland] Weird Heading numbers Date: Sat, 26 May 2007 01:21:16 -0300
On May 25, 2007, at 11:57 PM, Mike Stramba wrote:
Compasses, GPS, Aircraft, Marine Vessels all use "real headings".
Ok. Try explain to a 8-year child that 0 = 360.
You don't need to. There is no such thing as heading "0".
Headings go from 1 to 360.
I've never heard of any other use for them (before playing with Etoys ;) )
It's Geometry, in its very roots. I bet starting with this negativity of angles, relativity of things, one who learned with this principles in mind can understand the real basic Geometry (Euclidian, Cartesian, Vector Space etc) much better, much earlier.
We're talking about *headings*, not *angles*. If we're not, then the parameter should be re-named to "angles" :)
Anyway , I didn't realize that the scripts would respond to "190-360" and internally correct / do the right thing. So I just need to figure out the display/script thingy that Alan suggested.
It's also been "awhile" since I've been in school, but I've never heard of East being referred to as 0 degrees !
By the time these kdis are adults, all the planes will be automated anyway ... or all the airlines will have gone bankrupt ;)
Mike