// Use this for initialization void Start() { //gets slider object and checks if valid GameObject slider = GameObject.Find("KickPowerSlider"); if (slider != null) { kickPowerSlider = slider.GetComponent <Slider>(); } //sets initial value ot value from the ball kickPowerSlider.value = 1.0f; // m_pBallRef.getKickPower(); m_pBallRef.setKickPower(1.0f); // kickPowerSlider.value); }