From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Help again. Heh dont you just hate newbies? <grin>
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Date:	Sat, 26 Aug 2000 02:29:04 GMT
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On Fri, 25 Aug 2000 15:54:49 -0700 (PDT), Chris Amos
<homie_dont_play_dat AT yahoo DOT com> wrote:

>YES! Thats what I want to do. Dynamic allocation! But how do I
>Dynamicly allocate a 2 dimensional array. It would be preferable to do
>so because I could aviod the x*y+x math. If you know what I mean.

Here's what Allegro does for bitmaps:  malloc() enough space for your
control structure, pointers to each row, and the data itself.  Then,
after you fill the control structures and row pointers, you can access
tilemap->row[][] as if it were a simple 2D array which would be
compiled as (tilemap->row[y])[x].  Look at create_bitmap() in Allegro
source for more info on this technique.

Some developers simply use their libraries' bitmaps for their tilemaps
(each pixel is one tile).

-- 
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  [American cellphone lingo]

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