allegro help - page flipping?

i'm having some trouble with "page flipping" using allegro.. maybe i don't really understand the concept. i took a look at the link from the allegro thread in the FAQ, but it didn't really help... i've got some code, but i'm sure a lot of it is off.. i did it mostly by copy/pasting and trial and error.. this finally compiled without errors, but won't run.. it crashes. if someone could point me to a tutorial, or an example program, or something, that would be great..

here's the code i have

Code:

---

#include <allegro.h>

BITMAP *Screen[3], *Buffer, *character[2];

int main()
{
        // Initialize Allegro.       
        allegro_init();     
        set_color_depth(24);
        set_gfx_mode(GFX_SAFE, 800, 600, 0, 0);
        install_keyboard();

        bool vid=1;       

        Screen[0]=create_video_bitmap(800,600);
        Screen[1]=create_video_bitmap(800,600);
        Screen[2]=create_video_bitmap(800,600);
        Buffer=create_bitmap(800,600);
        character[0] = load_bitmap("MyPicture.bmp", NULL);
        character[1] = load_bitmap("MyPicture1.bmp", NULL);

        while(!key[KEY_ESC])
        {
                clear_bitmap(Buffer);
                draw_sprite(Buffer, character[vid], 400, 300);

                blit(Buffer, Screen[vid+1], 0, 0, 0, 0, 800, 600);

                show_video_bitmap(Screen[vid+1]);

                vid = !vid;
        }
       
        destroy_bitmap(Buffer);
        allegro_exit();
        return 0;
}

END_OF_MAIN();

---

any help is appreciated.

follow the link in my sig, and it will take you to my site. there i have two basic, allegro tutorials along with a tutorial explaining the concept of double buffering. you might want to, also, take a look at the links i have up.

thanks! it seems like this is a lot easier than page flipping, so why would page flipping be used?

is this code okay? or is there a better way to do this?

Code:

---

BITMAP *Buffer, *character[2];

int main()
{
        // Initialize Allegro.       

        int frame = 0;       

        Buffer=create_bitmap(800,600);
        character[0] = load_bitmap("MyPicture.bmp", NULL);
        character[1] = load_bitmap("MyPicture2.bmp", NULL);

        while(!key[KEY_ESC])
        {
                clear_bitmap(Buffer);

                draw_sprite(Buffer, character[frame], 400, 300);

                blit(Buffer, screen, 0, 0, 0, 0, 800, 600);

                frame = !frame;
        }
       
        destroy_bitmap(Buffer);
        allegro_exit();
        return 0;
}

---

this works fine, but is there a better way to do it?

thanks for the help. now it's time to look into timers.. my little man's feet are gunna get tired :rolleyes: