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<H1>Quadtrees?</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Quadtrees?</LI>
<LI><em>From</em>: Wout Mertens <<A HREF="mailto:Wout.Mertens#rug,ac.be">Wout.Mertens#rug,ac.be</A>></LI>
<LI><em>Date</em>: Fri, 28 Feb 1997 03:53:46 +0100 (MET)</LI>
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<PRE>
Hi all,
I am wondering why quadtrees would be so great for spatial representation
as it is used in a mud. As you will remember, a quadtree subdivides a
region into 4 subregions and makes quadtrees of those until the subregions
are uniform, so that you only keep information about things that are
different in a region (ok this desc stinks). But in a mud you need to do
lots of spatial relation searches, like all the objects within a range of
3.
Why not use a list of objects that is multi indexed on X and Y values?
Wout.
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<li><strong><A NAME="00019" HREF="msg00019.html">Re: Quadtrees?</A></strong>
<ul compact><li><em>From:</em> coder#ibm,net</li></ul>
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<ul><li>Thread context:
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<LI><strong><A NAME="00041" HREF="msg00041.html">q-tree stuff</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Mon 03 Mar 1997, 04:19 GMT
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<li><Possible follow-up(s)><br>
<LI><strong><A NAME="00043" HREF="msg00043.html">Re: q-tree stuff</A></strong>,
Carter T Shock <a href="mailto:ctso#umiacs,umd.edu">ctso#umiacs,umd.edu</a>, Mon 03 Mar 1997, 14:05 GMT
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<LI><strong><A NAME="00070" HREF="msg00070.html">Re: q-tree stuff</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Sat 08 Mar 1997, 11:54 GMT
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<LI><strong><A NAME="00033" HREF="msg00033.html">Linear Quadtrees</A></strong>,
Carter T Shock <a href="mailto:ctso#umiacs,umd.edu">ctso#umiacs,umd.edu</a>, Sun 02 Mar 1997, 20:35 GMT
<LI><strong><A NAME="00018" HREF="msg00018.html">Quadtrees?</A></strong>,
Wout Mertens <a href="mailto:Wout.Mertens#rug,ac.be">Wout.Mertens#rug,ac.be</a>, Fri 28 Feb 1997, 10:54 GMT
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<LI><strong><A NAME="00019" HREF="msg00019.html">Re: Quadtrees?</A></strong>,
coder <a href="mailto:coder#ibm,net">coder#ibm,net</a>, Fri 28 Feb 1997, 17:33 GMT
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<LI><strong><A NAME="00021" HREF="msg00021.html">Re: Quadtrees?</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Fri 28 Feb 1997, 23:49 GMT
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<LI><strong><A NAME="00022" HREF="msg00022.html">Re: Quadtrees?</A></strong>,
Carter T Shock <a href="mailto:ctso#umiacs,umd.edu">ctso#umiacs,umd.edu</a>, Sat 01 Mar 1997, 00:26 GMT
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<LI><strong><A NAME="00023" HREF="msg00023.html">Re: Quadtrees?</A></strong>,
S001GMU <a href="mailto:S001GMU#nova,wright.edu">S001GMU#nova,wright.edu</a>, Sat 01 Mar 1997, 04:11 GMT
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