Date: Fri, 14 Mar 1997 14:22:02 -0600 (CST)
From: Andrew Deren <aderen AT eecs DOT uic DOT edu>
To: Deltaman <deltaman AT swipnet DOT se>
cc: djgpp AT delorie DOT com
Subject: Re: How can I do this?
In-Reply-To: <33299450.3AB1@swipnet.se>
Message-ID: <Pine.SUN.3.95.970314141525.1219A-100000@s5y.eecs.uic.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

I think that it would be easier and faster to use integers as a direction,
then for comparison you do not have to compare strings,here is a sample
program that I came up just now. I did not test it so I do not know if
that would work:

#include <allegro.h>

#define DIR_RIGHT 1
#define DIR_LEFT 2

void walk(int dir) 
{
if (dir == DIR_RIGHT) {
if (frame_number == RIGHT_1) frame_number = RIGHT_2;
else frame_number = RIGHT_1;
}
else if (dir == DIR_LEFT) {
if (frame_number == LEFT_1) frame_number = LEFT_2;
else frame_number = LEFT_1;
}
draw_sprite((BITMAP*)data[frame_number].dat, screen, x_loc, y_loc);
}

main()
{
//do all your initialization and loading
...
while (1==1) {
if (key[KEY_RIGHT]) walk(DIR_RIGHT);
else if (key[KEY_LEFT]) walk(DIR_LEFT);
else if (key[KEY_ESC]) break;
}
}

On Fri, 14 Mar 1997, Deltaman wrote:

> Hi!
> 
> I'm quite new to c programming and I have the following problem.
> 
> In my main function I pass a string that contains a direction to
> the function 'walk(direction)'
> In this function I also give a value to 'int frame_number'
> 
> The sprite is defined named like RIGHT_1, RIGHT_2, LEFT_1 and so on
> 
> How can I use draw_sprite (in Allegro) to draw the right frame if
> I have the right direction and frame_number?
> ------------------------------------------------------------------------
> mailto:deltaman AT swipnet DOT se
> 
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