hello i have a problem

Questions & Answers
1

Assets/ARToolKit5-Unity/Scripts/ARController.cs(1618,11): error CS0619: UnityEngine.Mesh.Optimize()' is obsolete: This method is no longer supported (UnityUpgradable)’

what does it mean please help me if who knows this,

2

when i want to use drag camera and use this code then show me like this ERROR

i used this code

// Credit to damien_oconnell from http://forum.unity3d.com/threads/39513-Click-drag-camera-movement
// for using the mouse displacement for calculating the amount of camera movement and panning code.

using UnityEngine;
using System.Collections;

public class MoveCamera : MonoBehaviour
{
//
// VARIABLES
//

public float turnSpeed = 4.0f;		// Speed of camera turning when mouse moves in along an axis
public float panSpeed = 4.0f;		// Speed of the camera when being panned
public float zoomSpeed = 4.0f;		// Speed of the camera going back and forth

private Vector3 mouseOrigin;	// Position of cursor when mouse dragging starts
private bool isPanning;		// Is the camera being panned?
private bool isRotating;	// Is the camera being rotated?
private bool isZooming;		// Is the camera zooming?

//
// UPDATE
//

void Update () 
{
	// Get the left mouse button
	if(Input.GetMouseButtonDown(0))
	{
		// Get mouse origin
		mouseOrigin = Input.mousePosition;
		isRotating = true;
	}
	
	// Get the right mouse button
	if(Input.GetMouseButtonDown(1))
	{
		// Get mouse origin
		mouseOrigin = Input.mousePosition;
		isPanning = true;
	}
	
	// Get the middle mouse button
	if(Input.GetMouseButtonDown(2))
	{
		// Get mouse origin
		mouseOrigin = Input.mousePosition;
		isZooming = true;
	}
	
	// Disable movements on button release
	if (!Input.GetMouseButton(0)) isRotating=false;
	if (!Input.GetMouseButton(1)) isPanning=false;
	if (!Input.GetMouseButton(2)) isZooming=false;
	
	// Rotate camera along X and Y axis
	if (isRotating)
	{
        	Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - mouseOrigin);

		transform.RotateAround(transform.position, transform.right, -pos.y * turnSpeed);
		transform.RotateAround(transform.position, Vector3.up, pos.x * turnSpeed);
	}
	
	// Move the camera on it's XY plane
	if (isPanning)
	{
        	Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - mouseOrigin);

        	Vector3 move = new Vector3(pos.x * panSpeed, pos.y * panSpeed, 0);
        	transform.Translate(move, Space.Self);
	}
	
	// Move the camera linearly along Z axis
	if (isZooming)
	{
        	Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - mouseOrigin);

        	Vector3 move = pos.y * zoomSpeed * transform.forward; 
        	transform.Translate(move, Space.World);
	}
}

}