public void AdvanceToNextWave()
 {
     Wave.waveNumber++;
     waveNumberText.text = Wave.waveNumber.ToString();
     //wi.OnBetweenWaves();
     ca.GoBackToDefaultView();
     NextWave();
     Debug.Log("next wave");
     inv.CloseBetweenWaves();
     StartCoroutine(EndBetweenWaves());
     manager.IncrementWaveNumber(1);
 }