Xref:	news2.mv.net comp.os.msdos.djgpp:5202
From:	Ben Ashley <Ben AT flag DOT demon DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro's Grabber
Date:	Thu, 20 Jun 96 10:42:35 GMT
Organization:	Flag Bearers
Lines:	44
Message-ID:	<835267355snz@flag.demon.co.uk>
References:	<Pine DOT SGI DOT 3 DOT 91 DOT 960618173249 DOT 174C-100000 AT tower DOT york DOT ac DOT uk>
Reply-To:	Ben AT flag DOT demon DOT co DOT uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

In article <Pine DOT SGI DOT 3 DOT 91 DOT 960618173249 DOT 174C-100000 AT tower DOT york DOT ac DOT uk>
           slh100 AT york DOT ac DOT uk "Shawn Hargreaves" writes:

> I did this to make life easier, sorry if it is having the opposite 
> effect :-) My reasoning was that, given a lot of images in a single PCX 
> file (eg. I typically draw all the frames of a 32x32 character animation 
> in one PCX), without some sort of grid it would be a nightmare trying 
> to grab just the right bit of the image. If you position all your frames on 
> 16x16 grid squares, it's much easier to get the right bit of the bitmap.
> 
> If you want to remove the grid, edit grabber.c and in the function:
> 
> void grab_bitmap(BITMAP *bmp)
> {
>    ... stuff deleted ...
> 
>    while (!mouse_b) {
>       x = mouse_x & 0xFFF0;             <----- delete this line!
>       if (x + bmp->w > graphic->w)
>          x = (graphic->w - bmp->w) & 0xFFF0;
>       if (x < 0)
>          x = 0;
>       y = mouse_y & 0xFFF0;             <----- delete this line!

Hi Shawn,

I did exactly what you mention above.  The grabbing box just got stuck in the
top right hand corner of the PCX, and refused to move when I moved the mouse!

I think it may have something to do with where the mouse starts, and I am
going to look into it now...  If I find a solution, I will let the newsgroup
know.

-- 
Cheers,

Ben                                     -=Look for "Moo-Juice" on the IRC=-

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