AlexSnake

AlexSnake - simple snake game written in C with SDL

A lot of commented code because maybe it will be useful to me in the future.

I was too lazy to connect SDL_TTF, so when you need to notify the player about the event, a MessageBox is displayed.

    // eat yourself | you lose
    for (i_coords = 1; i_coords < body_snake_length; i_coords++) {
        if (snake_body[0].x == snake_body[i_coords].x && snake_body[0].y == snake_body[i_coords].y) {
            SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_WARNING, "You lose", "You lose!", window);
            quit = SDL_FALSE;
        }
    }

    // snake length == max(32) then game stop
    if (body_snake_length == SNAKE_MAX_LENGTH) {
        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_INFORMATION, "You win", "You win!", window);
        quit = SDL_FALSE;
    }

if you don't want the grid to be displayed put #if 0 so it doesn't render.

#if 1
        static SDL_Rect debug_rect;
        for (i_coords = 0; i_coords < FIELD_SIZE; i_coords++) {
            for (j_coords = 0; j_coords < FIELD_SIZE; j_coords++) {
                SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0x00);
                debug_rect.x = i_coords * BLOCK_SIZE;
                debug_rect.y = j_coords * BLOCK_SIZE;
                debug_rect.h = 100;
                debug_rect.w = 1;
                SDL_RenderFillRect(renderer, &debug_rect);

                debug_rect.h = 1;
                debug_rect.w = 100;
                SDL_RenderFillRect(renderer, &debug_rect);
            }
        }
#endif

and...

        if (is_max_length == SDL_TRUE) {
            // sometimes in snake_body[rewrite_snake_coords] x and y values > max field size or < min size
            // this crutch need for fix this bug
            // I'm actually just lazy and don't know how to use a debugger ;)
            if (snake_body[rewrite_snake_coords].x < FIELD_SIZE && snake_body[rewrite_snake_coords].x >= 0 &&
                    snake_body[rewrite_snake_coords].y < FIELD_SIZE && snake_body[rewrite_snake_coords].y >= 0) {
                map_structure[snake_body[rewrite_snake_coords].x][snake_body[rewrite_snake_coords].y] = 0;
            }
        }