SDL2 GameLoop

// Links = https://gamedev.stackexchange.com/questions/163477/how-can-i-avoid-jittery-motion-in-sdl2

struct Timer
{
    Uint64 previous_ticks{};
    float elapsed_seconds{};

    void tick()
    {
        const Uint64 current_ticks{ SDL_GetPerformanceCounter() };
        const Uint64 delta{ current_ticks - previous_ticks };
        previous_ticks = current_ticks;
        static const Uint64 TICKS_PER_SECOND{ SDL_GetPerformanceFrequency() };
        elapsed_seconds = delta / static_cast<float>(TICKS_PER_SECOND);
    }
};

int main()
{
    /*--------------Game loop--------------*/
    // Timing constants
    const int UPDATE_FREQUENCY{ 60 };
    const float CYCLE_TIME{ 1.0f / UPDATE_FREQUENCY };
    // System timing
    static Timer system_timer;
    float accumulated_seconds{ 0.0f };
    while (is_running)
    {
        // Update clock
        system_timer.tick();
        accumulated_seconds += system_timer.elapsed_seconds;

        /*--------------Event loop--------------*/
        /* ... */

        // Cap the framerate
        if (std::isgreater(accumulated_seconds, CYCLE_TIME))
        {
            // Reset the accumulator
            accumulated_seconds = -CYCLE_TIME;

            /*--------------Physics loop--------------*/
            static Timer physics_timer;
            physics_timer.tick();

            bot.position.x += bot.direction.x * bot.speed * physics_timer.elapsed_seconds;
            bot.position.y += bot.direction.y * bot.speed * physics_timer.elapsed_seconds;

            // Screen coordinate translations
            /* ... */

            ground.update();
            bot.update();

            // Camera
            /* ... */

            /*--------------Rendering loop--------------*/
            SDL_RenderClear(ren);
            ground.draw(ren);
            bot.draw(ren);
            SDL_RenderPresent(ren);

            /*--------------Todo: Animation loop--------------*/
            static Timer animation_timer;
            animation_timer.tick();

            /* ... */
        }
    }

    // Clean up used resources
    /* ... */
    SDL_Quit();
    return 0;
}