Starfield C++ main

starfield_cpp_main.cpp

// imports ...

const int WIDTH = 1360, HEIGHT = 760;
const int H_WIDTH = WIDTH / 2;
const int H_HEIGHT = HEIGHT / 2;
const int STARS_COUNT = 200;
float speed = 0.1;
float radius_delta = 0.001;
Uint32 fps_lasttime = SDL_GetTicks();
Uint32 fps_frames = 0;

// struct Star ...

void setFPStitle(SDL_Window *window)
{
    fps_frames++;
    if (fps_lasttime < SDL_GetTicks() - 1000)
    {
        fps_lasttime = SDL_GetTicks();
        auto title = "C++ SDL window: " + std::to_string(fps_frames) + " FPS";
        fps_frames = 0;
        SDL_SetWindowTitle(window, title.c_str());
    }
}

int main(int argc, char *argv[])
{
    // SDL initialization ...
    SDL_Event windowEvent;
    std::vector<Star> stars(STARS_COUNT, Star());

    while (true)
    {
        if (SDL_PollEvent(&windowEvent))
        {
            if (windowEvent.type == SDL_QUIT)
                break;
        }

        setFPStitle(window);

        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
        SDL_RenderClear(renderer);
      
        for (int i = 0; i < STARS_COUNT; i++)
        {
            Star *star = &stars[i];
            star->processStar();
            SDL_SetRenderDrawColor(renderer, star->brightness, star->brightness, star->brightness, 255);
            int x = star->viewX + H_WIDTH;
            int y = star->viewY + H_HEIGHT;
            SDL_RenderFillCircle(renderer, x, y, std::round(star->radius));
        }
        SDL_RenderPresent(renderer);
    }

    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return EXIT_SUCCESS;
}