c# - Unity3dの間違ったコードc＃oopはどこですか

Question

現在、プロジェクトに2つのクラスがあります。
クラス 1 でメソッド クラス 2 を使用したい。
そして、このコード c#

クラス1

public class controlBuilding : MonoBehaviour
{
    ScaleModel cScale = new ScaleModel();

    public void Start()
    {

    }

    public void Update()
    {
        cScale.touchScaleB1();
    }

    public void OnGUI()
    {

    }
}

クラス2

public class ScaleModel : MonoBehaviour
{
    public void touchScaleB1()
    {
        if (Input.touchCount >= 2)
        {
            Touch touch1 = Input.touches[0];
            Touch touch2 = Input.touches[1];

            if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
            {
                float pinchDistance = Vector2.Distance(touch1.position, touch2.position);
                float prevDistance = Vector2.Distance(touch1.position - touch1.deltaPosition,
                                                       touch2.position - touch2.deltaPosition);
                float pinchDistanceDelta = pinchDistance - prevDistance;

                if (pinchDistanceDelta > 0)
                {
                    float mScaleFactor;
                    mScaleFactor = b1_floor1dae.transform.localScale.x;
                    mScaleFactor += 0.0004f;
                    b1_floor1dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor2dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor3dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor4dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floorTop.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_other.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                }
                else if (pinchDistanceDelta < 0)
                {
                    float mScaleFactor;
                    mScaleFactor = b1_floor1dae.transform.localScale.x;
                    mScaleFactor -= 0.0004f;
                    b1_floor1dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor2dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor3dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floor4dae.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_floorTop.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                    b1_other.transform.localScale = new Vector3(mScaleFactor, mScaleFactor, mScaleFactor);
                }
            }
        }
    }
}

画面のタッチがイベントではないのはなぜですか? 間違ったコードはどこですか?

すみません、私は英語が苦手です。

回答ありがとうございました。