Camera movement script in Unity3D. Supports rotating, panning, and zooming. Attach to the main camera. Tutorial explaining code: http://jibransyed.wordpress.com/2013/02/22/rotating-panning-and-zooming-a-camera-in-unity/

MoveCamera.cs

// 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);
		}
	}
}

Camera is not rotating up and down. please help!

2 things needed to improve this

• a way to define a pivot point or center of rotation
• an inertia toggle

Thanks man, work very cool

I'm a unity newb... can anyone tell me how to get this script to run each time I load Unity, so it's the default behavior? And thanks.

Thanks, very helpful. I´ll credit the source on my project.

Thanks for the script.

Hi, very useful script!, i include phisics colision in this.

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

[RequireComponent(typeof(CharacterController))]
public class KeyboardOrbit : 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?
private CharacterController controller;
private CollisionFlags flags;

//
// UPDATE
//

void Update()
{
    controller = GetComponent<CharacterController>();

    // 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);

        flags = controller.Move(pos * Time.deltaTime);
    }

    // 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);

        flags = controller.Move(move * Time.deltaTime);
    }

    // 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);

        flags = controller.Move(move * Time.deltaTime);
    }
}

}

thanks
its very very useful!!!

@jlfeitosa3 too

Thanks a lot for the inspiration, very useful to sort out the last few bugs in my camera code.

`public class swipebutton : MonoBehaviour
{
public Camera cam;

void Update()
{
   
    cam.transform.Rotate(Vector3.up, 20.0f * Time.deltaTime);
}

}`

Hello Guys is there a way to restrict the camera on the z axis if so I need help

not working

Hi guys, when I launch the script and I try to zoom or rotate or pan the camera;I've the same error:
-System.NullReferenceException: Object reference not set to an instance of an object at MoveCamera.Update () [0x00193]
why?

eric2296, since the script is using Camera.main... you have to change your Main Camera tag to MainCamera on Inspector. That will fix the error

Can We add a path so camera will move on the path when swipe?

no