[R-sig-Geo] is.convex, is.monotone for polygons

[Nicholas Lewin-Koh]

Hi Markus,
I don't know of any packages that have an exported test for this,
but it would not be hard to write. For monotone it would probably be
better to write something a little more general that could test
if a polygon is x-monotone, y-monotone or rotationally monotone.
I would offer to write this, but I won't be able to get to it for a
while
since we are in the process of moving, and my computer will soon be
dismantled.

Nicholas

> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 18 Jun 2009 09:40:47 -0400
> From: Markus Loecher <markus.loecher at gmail.com>
> Subject: [R-sig-Geo] is.convex, is.monotone for polygons
> To: r-sig-geo at stat.math.ethz.ch
> Message-ID:
> 	<bf460e020906180640m66d4fff9o55177e1d525c4163 at mail.gmail.com>
> Content-Type: text/plain
> 
> Dear Rgeo users,
> I am looking for a package/function which computes whether a given
> polygon
> is monotone, does that exist ?
> I'd also be interested in a function which returns TRUE if the polygon is
> convex, though that is probably very simple to code up (check every angle
> ?)
> 
> Thanks,
> 
> Markus
> 
> 	[[alternative HTML version deleted]]
> 
> 
>