From: Marco <netuse@lavabit.com>
To: ntg-context@ntg.nl
Subject: Re: Metapost: union test of two paths
Date: Sun, 4 Jul 2010 01:11:27 +0200 [thread overview]
Message-ID: <20100704011127.277ee6ac@vorbis> (raw)
In-Reply-To: <4C2F3C7A.1020603@elvenkind.com>
Hi Taco!
> That is hard. The main problem is the word 'arbitrary'.
Sorry, I was too general. The paths are a outline of a relatively
simple shape (so border cases should rarely occur) with area >0k, not
selfintersecting.
> * is a point *on* the path in or out?
It doesn't matter in my case.
> This one seems ok at first glance (extensive testing will probably
> show border cases that are not covered).
I did run some tests. It works like a charm, exactly the way I expect.
Thank you very much for this piece of code. If I got it right, your
basic idea is to count the times the point inside the boundingbox
crosses the border of the shape. And the subpath stuff results of the
fact that intersectionpoint/times returns only one intersection even if
there are more. Very smart.
I'm grateful for your support.
Kind regards
Marco
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next prev parent reply other threads:[~2010-07-03 23:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-02 17:01 Marco
2010-07-03 8:03 ` Taco Hoekwater
2010-07-03 10:19 ` Taco Hoekwater
2010-07-03 13:34 ` Taco Hoekwater
2010-07-03 14:54 ` Marco
2010-07-03 23:11 ` Marco [this message]
2010-07-04 6:47 ` Taco Hoekwater
2010-07-04 8:09 ` Marco
2010-07-04 8:21 ` Taco Hoekwater
2010-07-03 10:33 ` Alan BRASLAU
2010-07-03 13:36 ` Taco Hoekwater
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