Thread: Allegro help-o

hey Vicious i tried this and works really well:

Code:

#include <allegro.h>


int counter;
int x = 300, left = 0, right = 0;

void update_counter()
{
     counter++;
}
END_OF_FUNCTION(update_counter);

int main()
{
   allegro_init();
   install_keyboard();

   LOCK_VARIABLE(counter);
   LOCK_FUNCTION(update_counter);
   install_int_ex( update_counter, BPS_TO_TIMER(60));

   set_color_depth(32);
   set_gfx_mode(GFX_AUTODETECT_FULLSCREEN, 640, 480, 0, 0);

   BITMAP *ship = load_bitmap( "ship.bmp", NULL );

   draw_sprite ( screen, ship, x, 300 );  
   
   while ( !key[KEY_ESC] ) 
   {   
      
        while (counter > 0) { 
           if (left)  x-=5;
           if (right) x+=5;
           counter--; 
        }
      if ( x < 540 && key[KEY_RIGHT])
            right = 1;
        else 
            right = 0; 
        if ( x > 50 && key[KEY_LEFT])
            left = 1;
        else 
            left = 0; 

        vsync();
        clear_to_color (screen, 0);
        draw_sprite ( screen, ship, x, 300 );
        
   } 


   destroy_bitmap(ship);
   allegro_exit();
   return 0;
}
END_OF_MAIN();

the only problem is that it messes up a tiny bit at the beginning and it leaves a trail once you move the bmp. however, there isn't any flickering at all right after the beginning.

I just tried the vsync() before you blit and it flickers way too much. My above code (well mostly yours actually ) works the best so far.

replacing clear to color() with clear(screen) doesn't work as well in that example doesn't work as well.

It's bad enough that it would not be acceptable in a game. The trail is not nearly as bad as the flickering. I'm trying some things out right now.

What I've been trying to do is to not blit the bmp but only blit the bmp when the bmp is moved. So if the bmp is not being moved there shouldn't be any flickering. But everytime I try this I mess everything up entirely.

yeah i tried that...basically anytime blit is involved there is a lot of flickering.

the trail is just like a blur. it's not all that bad but of course you'd rather have it without a blur.

Oh well then that's awesome, and I'm sure you're right, too.

I have a question. If somebody uses your program on their computer and they don't have allegro installed what files will they need? I even had the person get the allegro40.dll file and my program still wouldn't work. he tried both in the folder of the program itself and in the windows/system folder. For some reason it would never work. I'm above 100% positive that it is not because of the program. The program works perfectly fine for me. Are there any other files that person needs in order to execute my program?