Groups > comp.lang.java.programmer > #3381

Re: Programming question determining two circle's relation

Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!weretis.net!feeder5.news.weretis.net!news.swapon.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	"Gavino" <invalid@invalid.invalid>
Newsgroups	comp.lang.java.programmer
Subject	Re: Programming question determining two circle's relation
Date	Sat, 30 Apr 2011 18:33:28 +0200
Lines	27
Message-ID	<922rujFrlgU1@mid.individual.net> (permalink)
References	<892252a0-e31d-426b-8f47-d37c0b2ec364@17g2000prr.googlegroups.com> <14270bba-4ef7-4144-bba3-e0a1bb943fca@a21g2000prj.googlegroups.com> <2bc6aa50-5730-4057-b016-3a2b7154f0e9@f15g2000pro.googlegroups.com> <922ph0Fa0tU2@mid.individual.net> <7e45f31e-09cc-4bd8-90d1-aa76782bf9a5@d26g2000prn.googlegroups.com>
X-Trace	individual.net RbBLQWq/DA3u79WPshKqcAZga9CPoIPv2/rtECCVa7mnGjPwqP
Cancel-Lock	sha1:gZ/yKWGbNEsOkyXH4x0NbXFFTt4=
X-Priority	3
X-MSMail-Priority	Normal
X-Newsreader	Microsoft Outlook Express 6.00.2800.1106
X-MimeOLE	Produced By Microsoft MimeOLE V6.00.2800.1106
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:3381

Show key headers only | View raw

"byhesed" <byhesed@gmail.com> wrote in message
news:7e45f31e-09cc-4bd8-90d1-aa76782bf9a5@d26g2000prn.googlegroups.com...

>No, it's totally correct.

>In the source code, distance means the distance between center of two
>circles.
>So, distance = Math.sqrt((x0-x1)^2 + (y0-y1)^2)

Yes, but in that version of your code you didn't have the sqrt.

>Here is conditions for determining positions of two circles.
>Contains: d <= |r1 - r2|
>Overlaps: |r1 - r2| < d < r1 + r2

So you are defining c1.contains(c2) to include the case where c1 is inside
c2?
That's a strange definition of containment.

Conversely, your definition of 'overlaps' gives false when one circle is
inside the other, which I would expect to count as overlapping.

Still, it's your function and you can define it how you like (but if you are
producing this for someone else, you'd better be sure the definition matches
what is expected).

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 01:33 -0700
  Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 01:59 -0700
    Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 17:51 +0200
      Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 09:01 -0700
        Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 18:33 +0200
    Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 02:03 -0700
  Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 02:50 -0700
    Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 08:42 -0700
      Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 17:59 +0200
    Re: Programming question determining two circle's relation "John B. Matthews" <nospam@nospam.invalid> - 2011-04-30 17:25 -0400
      Re: Programming question determining two circle's relation Patricia Shanahan <pats@acm.org> - 2011-04-30 17:03 -0700
        Re: Programming question determining two circle's relation "John B. Matthews" <nospam@nospam.invalid> - 2011-05-01 03:10 -0400
  Re: Programming question determining two circle's relation Patricia Shanahan <pats@acm.org> - 2011-04-30 02:08 -0700
  Re: Programming question determining two circle's relation Roedy Green <see_website@mindprod.com.invalid> - 2011-04-30 11:49 -0700

csiph-web