From:	"A. Sinan Unur" <asu1 AT cornell DOT edu>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Thanks, HELP! mouse problems
Date:	Sat, 17 May 1997 16:02:44 -0400
Organization:	Cornell University
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To:	djgpp AT delorie DOT com
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Helix wrote:
> 
> First of all I would like to thank all the people who helped me out last
> time on my tile based game question. I got a new hard drive and forgot to
> copy all the letters from it, therefore I did not have the return address
> and could not thank them.
> I ended up creating a array of values, where each value represented a
> terrain. Using this I could redraw only certain squares when the character
> moved. (not the whole map)
> 
> Second, I've come across another snag. It concerns using the mouse routines
> in Allegro.
> 
>   if ((mouse_b & 1) & (mouse_x > fx) & (mouse_x < lx) & (mouse_y > fy) &
> (mouse_y < ly))
>    CityBackPix();
> 
> This is a sample from my code, It basically says that if the mouse pointer
> is within a certain range and the mouse button is pressed do the
> CityBackPic function. The problem is that it only works if I also 

no. the problem is that you are using bitwise and rather than logical
and. replace the &'s with &&'s.
-- 
----------------------------------------------------
A. Sinan Unur
mailto:asu1 AT cornell DOT edu
http://www.people.cornell.edu/pages/asu1

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