Camera controls, zoom & WASD pan

Assets/CameraControl.cs

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+using UnityEngine;
+
+public class CameraControl : MonoBehaviour
+{
+    [Range(0.1f, 30)]
+    public float MoveSpeed = 8.5f;
+    [Range(0, 30)]
+    public float MinZoom = 1.2f;
+    [Range(0, 30)]
+    public float MaxZoom = 10.0f;
+    [Range(0, 10)]
+    public float ZoomSpeed = 1.0f;
+
+    [Range(1, 60)]
+    public float TargetPositionMultiplier = 24.0f;
+
+    [Range(1, 60)]
+    public float TargetZoomMultiplier = 12.0f;
+
+    [SerializeField]
+    public float TargetZoom { get { return _targetZoom; } }
+    private float _targetZoom;
+    private Vector2 _targetPosition;
+
+    private new Camera camera;
+
+    void Start()
+    {
+        camera = GetComponent<Camera>();
+        _targetZoom = camera.orthographicSize;
+        _targetPosition = transform.position;
+    }
+
+    void Update()
+    {
+        // calculate target zoom
+        var scroll = Input.GetAxisRaw("Mouse ScrollWheel");
+        if (scroll != 0)
+        {
+            // scroll passes on it's negative value
+            var zoomAmount = camera.orthographicSize * scroll * ZoomSpeed;
+            // changes the target zoom, keeps it within min/max range
+            _targetZoom = Mathf.Clamp(camera.orthographicSize - zoomAmount, MinZoom, MaxZoom);
+
+            // Camera.main.transform.position = Vector2.Lerp(Camera.main.transform.position,
+            //                                               Camera.main.ScreenToWorldPoint(Input.mousePosition),
+            //                                               ZoomSpeed * Time.deltaTime);
+
+
+            // //KEEP THE Z POSITION BEHIND YOUR OBJECTS!
+            // Camera.main.transform.position = new Vector3(Camera.main.transform.position.x,
+            //                                              Camera.main.transform.position.y,
+            //                                              -20);
+        }
+
+        // calculate target position
+        // moveSpeed dependent on zoom, moves slower when zoomed in
+        // 50% speed at 2.5 zoom, 100% speed at 5 zoom, 200% speed at 10 zoom
+        // 0.5 = 1 / (5 / 2.5), 1 = (5 / 5), 2 = (5 / 10)
+        var movement = new Vector3(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical")) * MoveSpeed * Time.deltaTime * (1 / (5 / camera.orthographicSize));
+        _targetPosition += (Vector2)movement;
+
+        // Move towards the target zoom
+        if (_targetZoom != camera.orthographicSize)
+            camera.orthographicSize = Mathf.Lerp(camera.orthographicSize, _targetZoom, Time.deltaTime * TargetZoomMultiplier);
+
+        // Move towards the target position
+        if (_targetPosition != (Vector2)transform.position)
+        {
+            var newPosition = Vector2.Lerp(transform.position, _targetPosition, Time.deltaTime * TargetPositionMultiplier);
+            transform.position = new Vector3(newPosition.x, newPosition.y, -20);
+        }
+    }
+}

Assets/CameraControl.cs.meta

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