Integrated terrain, mouse drag and rotation

Assets/Scripts/Managers/CameraSystem.cs

@@ -1,5 +1,4 @@
 using Cinemachine;
-using System;
 using UnityEngine;
 
 public class CameraSystem : MonoBehaviour
@@ -22,14 +21,25 @@ public class CameraSystem : MonoBehaviour
     private bool _useEdgeScrolling;
     [SerializeField]
     private bool _useMouseDrag;
+    [SerializeField]
+    private bool _useMouseRotate;
 
     private Vector3 _followOffset;
+    [SerializeField]
     private float _rotateSpeed = 100f;
+    [SerializeField]
+    private float _mouseRotationSpeed = 3f;
+    [SerializeField]
     private float _moveSpeed = 25f;
+    [SerializeField]
     private int _edgeScrollSize = 20;
     private bool _dragPanMoveActive = false;
+    private bool _dragRotateMoveActive = false;
+    [SerializeField]
     private float _dragPanSpeed = 2f;
+    [SerializeField]
     private float _zoomSpeed = 2f;
+    [SerializeField]
     private float _zoomAmount = 3f;
     private Vector2 _lastMousePosition;
     private float _targetFieldOfView = 60f;
@@ -38,7 +48,7 @@ public class CameraSystem : MonoBehaviour
     private void Awake()
     {
         _cinemachineTransposer = _camera.GetCinemachineComponent<CinemachineTransposer>();
-        _followOffset = _cinemachineTransposer.m_FollowOffset;      
+        _followOffset = _cinemachineTransposer.m_FollowOffset;
     }
 
     private void Start()
@@ -78,9 +88,9 @@ public class CameraSystem : MonoBehaviour
     private void HandleCameraZoom_MoveY()
     {
         if (Input.mouseScrollDelta.y > 0)
-            _followOffset.y -=  _zoomAmount;
+            _followOffset.y -= _zoomAmount;
         if (Input.mouseScrollDelta.y < 0)
-            _followOffset.y +=  _zoomAmount;
+            _followOffset.y += _zoomAmount;
 
         _followOffset.y = Mathf.Clamp(_followOffset.y, _followOffsetMinY, _followOffsetMaxY);
 
@@ -90,7 +100,7 @@ public class CameraSystem : MonoBehaviour
         if (_followOffset.magnitude > _followOffsetMax)
             _followOffset.y = _zoomAmount * _followOffsetMax;
 
-        
+
 
         Vector3.Lerp(_cinemachineTransposer.m_FollowOffset, _followOffset, Time.deltaTime * _zoomSpeed);
 
@@ -167,8 +177,23 @@ public class CameraSystem : MonoBehaviour
 
         if (Input.GetKey(KeyCode.E)) rotateDir = 1f;
         if (Input.GetKey(KeyCode.Q)) rotateDir = -1f;
+        if (_useMouseRotate)
+        {
+            if (Input.GetMouseButtonDown(2))
+            {
+                _dragRotateMoveActive = true;
+                _lastMousePosition = Input.mousePosition;
+            }
+            if (Input.GetMouseButtonUp(2)) { _dragRotateMoveActive = false; }
+            if (_dragRotateMoveActive)
+            {
+                Vector2 mouseMovementDelta = ((Vector2)Input.mousePosition - _lastMousePosition);
+                rotateDir = mouseMovementDelta.x;
 
-
-        transform.eulerAngles += new Vector3(0, rotateDir * _rotateSpeed * Time.deltaTime, 0);
+                _lastMousePosition = Input.mousePosition;
+            }
+        }
+        var speed = _dragRotateMoveActive ? _mouseRotationSpeed : _rotateSpeed;
+        transform.eulerAngles += new Vector3(0, rotateDir * speed * Time.deltaTime, 0);
     }
 }