Isometric RTS camera

How to make a simple isometric RTS camera?

You just need to

1) create an empty game object EyeSocket (Game Object -> Create Empty)
- set its position to (X, Y, Z) 0, 130, 0


2) create EyeMovement Javascript script and attach it to EyeSocket


3) add camera object called Eye (Create Other -> Camera) and attach it to EyeSocket
- set its Rotation to (X, Y, Z) 30, 45, 0
- set its Projection to Orthographic
- set its Size to 50

<- rotation coordinates should be exactly the same

EyeMovement.js

Code (JavaScript):

1. function Update () {
2.            
3.     /////////////////////
4.     //keyboard scrolling
5.    
6.     var translationX : float = Input.GetAxis("Horizontal");
7.     var translationY : float = Input.GetAxis("Vertical");
8.     var fastTranslationX : float = 2 * Input.GetAxis("Horizontal");
9.     var fastTranslationY : float = 2 * Input.GetAxis("Vertical");
10.    
11.     if (Input.GetKey(KeyCode.LeftShift))
12.         {
13.         transform.Translate(fastTranslationX + fastTranslationY, 0, fastTranslationY - fastTranslationX);
14.         }
15.     else
16.         {
17.         transform.Translate(translationX + translationY, 0, translationY - translationX);
18.         }
19.  
20.     ////////////////////
21.     //mouse scrolling
22.    
23.     var mousePosX = Input.mousePosition.x;
24.     var mousePosY = Input.mousePosition.y;
25.     var scrollDistance : int = 5;
26.     var scrollSpeed : float = 70;
27.  
28.     //Horizontal camera movement
29.     if (mousePosX < scrollDistance)
30.         //horizontal, left
31.         {
32.         transform.Translate(-1, 0, 1);
33.         }
34.     if (mousePosX >= Screen.width - scrollDistance)
35.         //horizontal, right
36.         {
37.         transform.Translate(1, 0, -1);
38.         }
39.  
40.     //Vertical camera movement
41.     if (mousePosY < scrollDistance)
42.         //scrolling down
43.         {
44.         transform.Translate(-1, 0, -1);
45.         }
46.     if (mousePosY >= Screen.height - scrollDistance)
47.         //scrolling up
48.         {
49.         transform.Translate(1, 0, 1);
50.         }
51.    
52.     ////////////////////
53.     //zooming
54.     var Eye : GameObject = GameObject.Find("Eye");
55.    
56.     //
57.     if (Input.GetAxis("Mouse ScrollWheel") > 0  Eye.camera.orthographicSize > 4)
58.         {
59.         Eye.camera.orthographicSize = Eye.camera.orthographicSize - 4;
60.         }
61.    
62.     //
63.     if (Input.GetAxis("Mouse ScrollWheel") < 0  Eye.camera.orthographicSize < 80)
64.         {
65.         Eye.camera.orthographicSize = Eye.camera.orthographicSize + 4;
66.         }
67.  
68.     //default zoom
69.     if (Input.GetKeyDown(KeyCode.Mouse2))
70.         {
71.         Eye.camera.orthographicSize = 50;
72.         }
73.        
74. }

EyeSocket + Eye as a prefab, and EyeMovement.js attached. Please note that you need to set EyeSocket position to (X, Y, Z) 0, 130, 0 to get it to move properly.

View attachment $isometric_rts_camera.unitypackage

 

nice work. thanks

 

How to I limit the mouse movements? On the keyboard I was able to set horizontal and vertical limits so that you couldn't scroll too far off my scene, but I can't seem to figure out how to do this with the mouse. Here is my code:

Code (csharp):

1.  
2.     private float leftSide = -100f;
3.     private float rightSide = -80f;
4.     private float topSide = -80f;
5.     private float bottomSide = -100f;
6.    
7.     // Update is called once per frame
8.     void Update ()
9.     {
10.    
11.         /////////////////////
12.         //keyboard scrolling       
13.         float translationX = Input.GetAxis("Horizontal");
14.         float translationZ = Input.GetAxis("Vertical");
15.            
16.         float toX = translationX + translationZ;           
17.         if (transform.position.x + toX < leftSide)
18.         {
19.             toX = 0;
20.         }
21.         if (transform.position.x + toX > rightSide)
22.         {
23.             toX = 0;
24.         }
25.         float toZ = translationZ - translationX;           
26.         if (transform.position.z + toZ > topSide)
27.         {
28.             toZ = 0;
29.         }
30.         if (transform.position.z + toZ < bottomSide)
31.         {
32.             toZ = 0;
33.         }
34.         transform.Translate(toX, 0, toZ);
35.        
36.        
37.         ////////////////////
38.         //mouse scrolling  
39.         float mousePosX = Input.mousePosition.x;
40.         float mousePosY = Input.mousePosition.y;
41.         int scrollDistance = 1;
42.         float scrollSpeed = 70;
43.        
44.         //Horizontal camera movement
45.         //horizontal, left
46.         if (mousePosX < scrollDistance)
47.         {
48.             transform.Translate(-1, 0, 1);
49.         }
50.         //horizontal, right
51.         if (mousePosX >= Screen.width - scrollDistance)
52.         {
53.             transform.Translate(1, 0, -1);
54.         }
55.        
56.         //Vertical camera movement
57.         //scrolling down
58.         if (mousePosY < scrollDistance)
59.         {
60.             transform.Translate(-1, 0, -1);
61.         }
62.         //scrolling up
63.         if (mousePosY >= Screen.height - scrollDistance)
64.         {
65.             transform.Translate(1, 0, 1);
66.         }
67. }
68.  

 

Hi,
How I rotate the camera, please?
Thanks

 

//rotate
if (Input.GetMouseButton(2))
{
translationX = Input.GetAxis ("Mouse X");
transform.RotateAround(Vector3.up, translationX * cameraSpeed * Time.deltaTime);

}

 

this only works in c#. You will have to define camera speed to determine how quickly it will rotate.

I have a question though. I converted your code into c# and it works great but I do not know how to change the camera speed on the zoom or x/y translations.

 

This is a RTS camera I'have created some time ago. Maybe it can help someone.
[Post]
[Github link]

 

Looks like a solid camera. Thanks for the script I haven't quite mastered rotation yet so this should help a lot.