Ortho Camera Click and Drag + Zoom with bounds

My camera is looking at a plane with a map texture on it. What I would like to do is be able to zoom into the map (with the mouse wheel). When zoomed in, the user can click and drag to move around the map. Here's what I cannot figure out: 1) I want to zoom towards the mouse cursor (like Google Maps). 2) I want to lock the camera such that it never shows the "out-of bounds" area. Since the zoom can be anywhere between 100% - 150% the camera will lock at different places at each zoom level. Part of this would be as they zoom out, the camera will recenter so as to not show the dead space.

Can someone point me in the right direction (C#)? Thanks.

 

Finally figured it out. Code below in case anyone else happens upon this post. Probably not the most efficient way, but it works. (Working on the zoom to cursor still, will update when I get it working)

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class MapControl : MonoBehaviour {
5.     public float maxZoom;
6.     public float minZoom;
7.     public float panSpeed = -1;
8.    
9.     Vector3 bottomLeft;
10.     Vector3 topRight;
11.    
12.     float cameraMaxY;
13.     float cameraMinY;
14.     float cameraMaxX;
15.     float cameraMinX;
16.    
17.     void Start()
18.     {  
19.         //set max camera bounds (assumes camera is max zoom and centered on Start)
20.         topRight = camera.ScreenToWorldPoint(new Vector3(camera.pixelWidth, camera.pixelHeight, -transform.position.z));
21.         bottomLeft = camera.ScreenToWorldPoint(new Vector3(0,0,-transform.position.z));
22.         cameraMaxX = topRight.x;
23.         cameraMaxY = topRight.y;
24.         cameraMinX = bottomLeft.x;
25.         cameraMinY = bottomLeft.y;
26.     }
27.    
28.     void Update ()
29.     {
30.         //click and drag
31.         if(Input.GetMouseButton(0))
32.         {
33.             float x = Input.GetAxis("Mouse X") * panSpeed;
34.             float y = Input.GetAxis("Mouse Y") * panSpeed;
35.             transform.Translate(x,y,0);
36.         }
37.        
38.         //zoom
39.         if((Input.GetAxis("Mouse ScrollWheel") > 0)  Camera.main.orthographicSize > minZoom ) // forward
40.         {
41.             Camera.main.orthographicSize = Camera.main.orthographicSize - 0.5f;
42.         }
43.            
44.         if ((Input.GetAxis("Mouse ScrollWheel") < 0)  Camera.main.orthographicSize < maxZoom) // back            
45.         {
46.             Camera.main.orthographicSize = Camera.main.orthographicSize + 0.5f;
47.         }
48.        
49.        
50.         //check if camera is out-of-bounds, if so, move back in-bounds
51.         topRight = camera.ScreenToWorldPoint(new Vector3(camera.pixelWidth, camera.pixelHeight, -transform.position.z));
52.         bottomLeft = camera.ScreenToWorldPoint(new Vector3(0,0,-transform.position.z));
53.        
54.         if(topRight.x > cameraMaxX)
55.         {
56.             transform.position = new Vector3(transform.position.x - (topRight.x - cameraMaxX), transform.position.y, transform.position.z);
57.         }
58.        
59.         if(topRight.y > cameraMaxY)
60.         {
61.             transform.position = new Vector3(transform.position.x, transform.position.y - (topRight.y - cameraMaxY), transform.position.z);
62.         }
63.        
64.         if(bottomLeft.x < cameraMinX)
65.         {
66.             transform.position = new Vector3(transform.position.x + (cameraMinX - bottomLeft.x), transform.position.y, transform.position.z);
67.         }
68.        
69.         if(bottomLeft.y < cameraMinY)
70.         {
71.             transform.position = new Vector3(transform.position.x, transform.position.y + (cameraMinY - bottomLeft.y), transform.position.z);
72.         }
73.     }
74. }
75.  

 

Hey man, maybe its not the most efficient, but its simple and it works well! thanks buddy

 

Thanks for the script I'd used on my project but I received this error

Assets/Standard Assets/Character Controllers/MapControl.cs(39,67): error CS1525: Unexpected symbol `Camera'

Is there something wrong in the code?

Please help!

Thanks.

 

Hi Dud I get the same error , just replace "Camera" for

• GetComponent<Camera>().

GL