void DoEngine(float rectx , float recty) // kolizja gracz - przeszkody 1, 2 w maczierzy
{
    if ((positionx < rectx + rectwidth/2 + 0.1f)   && (positionx > rectx) && (positionz < recty + rectheight/2) && (positionz > recty - rectheight/2))
        {positionx = rectx + rectwidth/2 + 0.11f;}

    if ((positionx > rectx - rectwidth/2 - 0.1f)   && (positionx < rectx) && (positionz < recty + rectheight/2) && (positionz > recty - rectheight/2))
        {positionx = rectx - rectwidth/2 - 0.11f;}

    if ((positionz < recty + rectheight/2 + 0.1f)   && (positionz > recty) && (positionx < rectx + rectwidth/2) && (positionx > rectx - rectwidth/2))
        {positionz = recty + rectheight/2 + 0.11f;}

    if ((positionz > recty - rectheight/2 - 0.1f)   && (positionz < recty) && (positionx < rectx + rectwidth/2) && (positionx > rectx - rectwidth/2))
        {positionz = recty - rectheight/2 - 0.11f;}

}