From: locke AT mcs DOT net (Peter Johnson)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Allegro mouse routines... Code probs
Date: Thu, 16 Dec 1999 15:07:08 -0600
Organization: BiLogic Productions
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Message-ID: <MPG.12c3107b3dc38e0b9896dd@news.cso.uiuc.edu>
References: <cPb64.12704$uj2 DOT 348729 AT newscontent-01 DOT sprint DOT ca>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

In article <cPb64.12704$uj2 DOT 348729 AT newscontent-01 DOT sprint DOT ca>, 
max133 AT chalktv DOT com says...
>  for (mx==x1; mx<x2; mx++)
>  {
>   for (my==y1; my<y2; my++)
>   {
>    if ((mouse_x==mx) && (mouse_y==my) )&& (mouse_b & 1))
>    {
>     newgame();
>   }
>   }
>  }

Instead of this, why not the following:

if ((mouse_x < x2) && (mouse_x > x1) &&
    (mouse_y < y2) && (mouse_y > y1) &&
    (mouse_b & 1))
        newgame();

Looping through the entire coordinate range is wasteful.

Also, a better way to do this test would be in a mouse callback instead 
of polling, but that's another topic entirely.. :)

-- 
Peter Johnson             locke AT mcs DOT net
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