Function main

deps/SDL2/Xcode-iOS/Demos/src/accelerometer.c:157–226

int
main(int argc, char *argv[])
{

    SDL_Window *window;         /* main window */
    SDL_Renderer *renderer;
    int done;                   /* should we clean up and exit? */
    int w, h;

    /* initialize SDL */
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
        fatalError("Could not initialize SDL");
    }

    /* create main window and renderer */
    window = SDL_CreateWindow(NULL, 0, 0, 320, 480, SDL_WINDOW_FULLSCREEN | SDL_WINDOW_ALLOW_HIGHDPI);
    renderer = SDL_CreateRenderer(window, 0, 0);
    
    SDL_GetWindowSize(window, &w, &h);
    SDL_RenderSetLogicalSize(renderer, w, h);

    /* print out some info about joysticks and try to open accelerometer for use */
    printf("There are %d joysticks available\n", SDL_NumJoysticks());
    printf("Default joystick (index 0) is %s\n", SDL_JoystickName(0));
    accelerometer = SDL_JoystickOpen(0);
    if (accelerometer == NULL) {
        fatalError("Could not open joystick (accelerometer)");
    }
    printf("joystick number of axis = %d\n",
           SDL_JoystickNumAxes(accelerometer));
    printf("joystick number of hats = %d\n",
           SDL_JoystickNumHats(accelerometer));
    printf("joystick number of balls = %d\n",
           SDL_JoystickNumBalls(accelerometer));
    printf("joystick number of buttons = %d\n",
           SDL_JoystickNumButtons(accelerometer));

    /* load graphics */
    initializeTextures(renderer);

    /* setup ship */
    shipData.x = (w - shipData.rect.w) / 2;
    shipData.y = (h - shipData.rect.h) / 2;
    shipData.vx = 0.0f;
    shipData.vy = 0.0f;

    done = 0;
    /* enter main loop */
    while (!done) {
        double deltaTime = updateDeltaTime();
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                done = 1;
            }
        }
        render(renderer, w, h, deltaTime);
        SDL_Delay(1);