OpacityOfAllChanger.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class OpacityOfAllChanger : MonoBehaviour {

    private List<GameObject> organs = new List<GameObject>();


    void OnEnable () {
        // Register event callbacks:
        PatientEventSystem.startListening (PatientEventSystem.Event.PATIENT_FinishedLoading, openPatient);
        PatientEventSystem.startListening (PatientEventSystem.Event.PATIENT_Closed, closePatient);
    }

    void OnDisable () {
        // Unregister myself:
        PatientEventSystem.stopListening (PatientEventSystem.Event.PATIENT_FinishedLoading, openPatient);
        PatientEventSystem.stopListening (PatientEventSystem.Event.PATIENT_Closed, closePatient);
    }

    public void addOrgan (GameObject newOrgan) {
        organs.Add (newOrgan);
    }

    public void changeOpacityofAll (float opacity) {
        foreach(GameObject o in organs) {
            o.GetComponent<MeshMaterialControl> ().changeOpactiyOfChildren (opacity);
        }
    }

    public void closePatient(object obj = null) {
        organs = new List<GameObject> ();
    }

    public void openPatient(object obj = null) {
        foreach(Transform child in transform) {
            if(child.gameObject.GetComponent<MeshMaterialControl>() != null) {
                organs.Add (child.gameObject);
            }
        }
    }
}