Unity3D realizes object rotation, scaling and moving effects

using UnityEngine;
using ;
 
public class ObjectControl : MonoBehaviour
{
 public Transform target;
 public float yawSensitivity = 80.0f;
 public float pitchSensitivity = 160.0f;
 public bool clampPitchAngle = true;
 public float pinchZoomSensitivity = 0.5f;//Scaling speed public float smoothZoomSpeed = 10.0f;
 public float smoothOrbitSpeed = 20.0f;
 public float distance = 0;
 
 float yaw = 0;
 float pitch = 0;
 float idealYaw = 0;
 float idealPitch = 0;
 float fChangeScale = 0;
 float fChangeideal = 0;
 public Transform[] movementP;
 
 /// <summary>
 /// Control mode enumeration /// </summary>
 public enum ControlModel
 {
 Zoom, Rotate, Translate
 }
 
 public ControlModel controlModel = ;
 
 //Vector3 position=new Vector3();
 public bool bArrive = false;//Whether the mouse reaches the boundary area of ​​the part box // Is the translation method based on the drag distance of the mouse or is it directly set to the mouse position? public bool ifDragMove = false;
 //The translation method is: the speed of evaluation when dragging the mouse according to the distance public float moveSpeed = 1.0f;
 //It is enough to draw buttons (zoom, rotate, and pan) public bool ifDrawBtn = true;
 //Change the zoom method to: change the camera range public bool zoomCamera = false;
 //zoomCamera = true , the minimum range value of the camera public float minZoom = 0f;
 //zoomCamera = true , the maximum range value of the camera public float maxZoom = 179f;
 //Platform object public Transform moveTarget;
 //The initial position of the translation object Vector3 moveTargetPos;
 //The direct parent object of the model public Transform parentModel;
 Vector3 parentModelPos;
 
 void Start()
 {
 zoomCamera = true;
 }
 
 void OnEnable()
 {
 
  += FingerGestures_OnDragMove;
  += FingerGestures_OnPinchMove;
  += OnFingerDragEnd;
 
 }
 
 void OnDisable()
 {
  -= FingerGestures_OnDragMove;
  -= FingerGestures_OnPinchMove;
  -= OnFingerDragEnd;
 }
 
 public void setRotation()
 {
 Vector3 angles = ;
 yaw = idealYaw = ;
 pitch = idealPitch = ;
 }
 
 void FingerGestures_OnDragMove(Vector2 fingerPos, Vector2 delta)
 {
 onDrag = true;
 try
 {
   = false;
 }
 catch
 {
   = false;
 }
 if (controlModel ==  && !bArrive)
 {
  idealYaw -=  * yawSensitivity * 0.02f;
  idealPitch +=  * pitchSensitivity * 0.02f;
  len = delta;
  if (target) (new Vector3(, -, 0), );
 }
 if (controlModel ==  && !bArrive)
 {
  if (ifDragMove)
  {
  if (moveTarget == null)
  {
    = new Vector3( +  * moveSpeed,  +  * moveSpeed, );// GetWorldPos( fingerPos );
  }
  else
  {
    = new Vector3( +  * moveSpeed,  +  * moveSpeed, );
  }
  }
  else
  {
  if (moveTarget == null)
  {
    = GetWorldPos(fingerPos);
  }
  else
  {
    = GetWorldPos(fingerPos);
  }
  }
 }
 
 }
 
 void FingerGestures_OnPinchMove(Vector2 fingerPos1, Vector2 fingerPos2, float delta)
 {
 
 if (controlModel ==  && !bArrive)
 {
  if (zoomCamera)
  {
  float fZoom =  - delta * pinchZoomSensitivity * 800 * ;
  fZoom = (fZoom, maxZoom);
  fZoom = (fZoom, minZoom);
   = (, fZoom,  * smoothZoomSpeed);
  //  =  - fZoom * ;
  }
  else
  {
 
  fChangeScale =  + delta * pinchZoomSensitivity;
 
  Vector3 vc = new Vector3(fChangeScale, fChangeScale, fChangeScale);
  }
 }
 }
 //Sliding ends void OnFingerDragEnd(int fingerIndex, Vector2 fingerPos)
 {
  = true;
 
 onDrag = false;
 }
 
 
 //Convert Unity screen coordinates to 3D coordinates Vector3 GetWorldPos(Vector2 screenPos)
 {
 // Camera mainCamera = ;
 Camera mainCamera = ("MainCamera").GetComponent<Camera>();
 if (!)
 {
  mainCamera = ("CameraOne").GetComponent<Camera>();
 }
 return (new Vector3(, , ( - )));
 }
 
 void Apply()
 {
 if (controlModel ==  && !bArrive)
 {
  yaw = (yaw, idealYaw,  * smoothOrbitSpeed);
  pitch = (pitch, idealPitch,  * smoothOrbitSpeed);
 }
 }
 bool onDrag;
 Vector2 len;
 
 void LateUpdate()
 {
 if ((1) || (0))
 {
   = true;
 }
 Apply();
 }
 
 static float ClampAngle(float angle, float min, float max)
 {
 if (angle < -360)
  angle += 360;
 
 if (angle > 360)
  angle -= 360;
 
 return (angle, min, max);
 }
 
 void Update()
 {
 ///Free switching 
 if ((0))
 {
 
  controlModel = ;
 }
 
 if ((1))
 {
 
  controlModel = ;
 }
 
 if (("Mouse ScrollWheel") != 0)
 {
  controlModel = ;
 }
 
 }
 
 /// <summary>
 /// Reset /// </summary>
 public void ResetValue()
 {
 if (moveTarget != null)
 {
   = moveTargetPos;
 }
 if (parentModel != null)
 {
   = parentModelPos;
 }
 yaw = 0;
 pitch = 0;
 idealYaw = 0;
 idealPitch = 0;
 }
 
}