Restrict 2d drag camera movement

Questions & Answers
1

Hi i got this script:

using UnityEngine;
using System.Collections;

public class CameraMovement : MonoBehaviour {
    private float dist;
    private Vector3 v3OrgMouse;
    private Plane plane = new Plane(Vector3.up, Vector3.zero);

    void Start() {
        dist = transform.position.z;  // Distance camera is above map
    }

    void Update() {

        if (Input.GetMouseButtonDown(0)) {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            float dist;
            plane.Raycast(ray, out dist);
            v3OrgMouse = ray.GetPoint(dist);
            v3OrgMouse.z = 0;
        } else if (Input.GetMouseButton(0)) {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            float dist;
            plane.Raycast(ray, out dist);
            Vector3 v3Pos = ray.GetPoint(dist);
            v3Pos.z = 0;
            transform.position -= (v3Pos - v3OrgMouse);
        }
    }
}

I need borders, i tried something like this:

if (transform.position.x >= -320 && transform.position.y <= 180 && transform.position.x <= 320 && transform.position.y >= -180) {
                transform.position -= (v3Pos - v3OrgMouse);
            }

But with my script i can move the camera for example to x = -321 and then i cant move anything anymore because the if statement is false.

I hope you have a solution.
Thx

2

This is what I normally do.

transform.position = new Vector3(
  Mathf.Clamp(transform.position.x,-320,320),
  Mathf.Clamp(transform.position.y,-180,180),
  transform.position.z
);