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Re: What are the proper terms for these concepts?

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Seems to me that "polar angle" might be the mathematical term for an
absolute angle. It works in 3 dimensions as well (aka Zenith angle in
that context).

http://mathworld.wolfram.com/PolarAngle.html

Alex

Daniel Pitts wrote:

> I have a few concepts in a program I'm writing, but I'm not sure if
> there are "canonical" terms for them, and would like to use those
> terms if possible.  All these terms are for 2 dimensional shapes, but
> if there is a more general term for n dimensional I'd be interested
> in that as well, just for knowledge sake.
> 
> In my codebase, it makes sense to distinguish between an absolute
> angle and a relative angle. Absolute angles are really relative to
> the fixed "east" vector, and Relative angles are clockwise or
> counter-clockwise rotations. You can scale relative angles, but not
> absolute angles. You can add relative angles to each other or to
> absolute angles, but absolute angles can't be added to each other.
> You can find a relative angle between two absolute angles. Is there a
> more formal concept of this?
> 
> One thing I'm calling an "angle bracket", which is basically two
> angles, the absolute angle "clockwise-bound" and the relative angle
> "width". This can include a zero width bracket (basically just a
> ray), or an all inclusive bracket.
> 
> If I add a radius to that (to make it a pie slice), the term I found
> is "sector". Is a full circle also a "sector"? How about if the angle
> is zero?
> 
> Thanks in advance,
> Daniel.

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What are the proper terms for these concepts? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-03-13 10:21 -0700
  Re: What are the proper terms for these concepts? Lew <lewbloch@gmail.com> - 2012-03-13 11:25 -0700
    Re: What are the proper terms for these concepts? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-03-13 13:35 -0700
      Re: What are the proper terms for these concepts? Lew <lewbloch@gmail.com> - 2012-03-13 13:57 -0700
        Re: What are the proper terms for these concepts? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-03-14 09:07 -0700
      Re: What are the proper terms for these concepts? "John B. Matthews" <nospam@nospam.invalid> - 2012-03-13 23:17 -0400
        Re: What are the proper terms for these concepts? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-03-14 09:02 -0700
  Re: What are the proper terms for these concepts? Lew <lewbloch@gmail.com> - 2012-03-13 11:29 -0700
  Re: What are the proper terms for these concepts? "Alex" <alex@foo.invalid> - 2012-03-13 21:49 +0000
  Re: What are the proper terms for these concepts? Roedy Green <see_website@mindprod.com.invalid> - 2012-03-14 15:30 -0700
    Re: What are the proper terms for these concepts? Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-15 01:09 +0000
      Re: What are the proper terms for these concepts? Lew <lewbloch@gmail.com> - 2012-03-14 18:24 -0700
        Re: What are the proper terms for these concepts? Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-15 22:05 +0000

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