Re: Calculating coordinate intersections?

From	Rui Maciel <rui.maciel@gmail.com>
Newsgroups	comp.programming
Subject	Re: Calculating coordinate intersections?
Date	2013-03-22 08:36 +0000
Organization	A noiseless patient Spider
Message-ID	<kih52f$5l4$1@dont-email.me> (permalink)
References	<0001HW.CD6E31F4003565A0B04999BF@news.eternal-september.org> <969b668e-4ae1-4641-ba15-ac80e793a57f@y2g2000pbg.googlegroups.com> <kifulm$aas$1@dont-email.me> <0001HW.CD71423500ED3610B01029BF@news.eternal-september.org>

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DaveC wrote:

> Can you please suggest how best to do this?

I've suggested bounding the target with a circle/sphere, represent the shot 
as a line and then check if the shot hit the target by evaluating the 
intersection between the line and the bounding circle/sphere.

http://en.wikipedia.org/wiki/Line%E2%80%93sphere_intersection


Hope this helps,
Rui Maciel

Thread

Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-19 15:17 -0700
  Re: Calculating coordinate intersections? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-03-19 18:26 -0700
    Re: Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-19 21:53 -0700
      Re: Calculating coordinate intersections? Robert Wessel <robertwessel2@yahoo.com> - 2013-03-20 02:05 -0500
        Re: Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-20 13:19 -0700
          Re: Calculating coordinate intersections? "BartC" <bc@freeuk.com> - 2013-03-20 21:42 +0000
          Re: Calculating coordinate intersections? Robert Wessel <robertwessel2@yahoo.com> - 2013-03-20 23:48 -0500
  Re: Calculating coordinate intersections? rouben@shady.(none) (Rouben Rostamian) - 2013-03-20 05:27 +0000
    Re: Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-19 23:39 -0700
      Re: Calculating coordinate intersections? Geoff <geoff@invalid.invalid> - 2013-03-20 00:33 -0700
  Re: Calculating coordinate intersections? James Dow Allen <jdallen2000@yahoo.com> - 2013-03-20 23:41 -0700
    Re: Calculating coordinate intersections? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-03-21 13:18 -0700
      Re: Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-21 23:02 -0700
        Re: Calculating coordinate intersections? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-03-21 23:28 -0700
    Re: Calculating coordinate intersections? Rui Maciel <rui.maciel@gmail.com> - 2013-03-21 21:40 +0000
      Re: Calculating coordinate intersections? DaveC <invalid@invalid.net> - 2013-03-21 23:03 -0700
        Re: Calculating coordinate intersections? Rui Maciel <rui.maciel@gmail.com> - 2013-03-22 08:36 +0000
          Re: Calculating coordinate intersections? bob <bob@coolfone.comze.com> - 2013-03-22 07:16 -0700
        Re: Calculating coordinate intersections? Geoff <geoff@invalid.invalid> - 2013-03-22 01:49 -0700
  Re: Calculating coordinate intersections? Rui Maciel <rui.maciel@gmail.com> - 2013-03-21 21:26 +0000
    Re: Calculating coordinate intersections? notme <notme@notme.org> - 2013-03-22 00:31 -0700
  Re: Calculating coordinate intersections? "Chris M. Thomasson" <no@spam.invalid> - 2013-03-22 13:08 -0700

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