Add Camera controlled by player. #7 (#10)

Adds the player camera as described in #7.

As a note for the future that I forgot to add as a comment here, the camera zoom and rotation should be tweened to give a smoother effect.

Reviewed-on: #10
Reviewed-by: zephyr <zephyr@noreply.localhost>
Co-authored-by: Michael <mep053@gmail.com>
Co-committed-by: Michael <mep053@gmail.com>

Assets/Scripts/IdleSurvivors.asmdef

@@ -1,3 +1,16 @@
 {
-	"name": "IdleSurvivors"
-}
+    "name": "IdleSurvivors",
+    "rootNamespace": "",
+    "references": [
+        "GUID:75469ad4d38634e559750d17036d5f7c"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Assets/Scripts/Input.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: d0cf95adbbea4f6ea1e1d7c250abb38f
+timeCreated: 1690824944

Assets/Scripts/Input/PlayerCameraInputHandler.cs

@@ -0,0 +1,41 @@
+using DefaultNamespace;
+using UnityEngine;
+using UnityEngine.InputSystem;
+
+namespace Input
+{
+    public class PlayerCameraInputHandler : MonoBehaviour
+    {
+        [SerializeField] private PlayerCameraController cameraController;
+        [SerializeField] [Range(0, 100)] private float rotationSensitivity;
+        [SerializeField] [Range(0, 1)] private float zoomSensitivity;
+
+        private bool _allowRotation;
+        
+        public void OnInputZoom(InputAction.CallbackContext context)
+        {
+            var input = context.ReadValue<float>();
+            var zoomAmount = input * zoomSensitivity * Time.deltaTime;
+            cameraController.Zoom(zoomAmount);
+        }
+
+        public void OnInputRotate(InputAction.CallbackContext context)
+        {
+            if (context.phase != InputActionPhase.Performed) return;
+            if (!_allowRotation) return;
+            
+            var input = context.ReadValue<float>();
+            var rotationAmount = input * rotationSensitivity * Time.deltaTime;
+            cameraController.RotateAround(rotationAmount);
+        }
+
+        public void OnInputHoldToRotate(InputAction.CallbackContext context)
+        {
+            _allowRotation = context.phase switch
+            {
+                InputActionPhase.Performed => true,
+                _ => false
+            };
+        }
+    }
+}

Assets/Scripts/Input/PlayerCameraInputHandler.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 0b94be55d5ec4fedb531d50297528d3b
+timeCreated: 1690824962

Assets/Scripts/PlayerCameraController.cs

@@ -0,0 +1,37 @@
+using System;
+using UnityEngine;
+using UnityEngine.Serialization;
+
+namespace DefaultNamespace
+{
+    public class PlayerCameraController : MonoBehaviour
+    {
+        [SerializeField] private Transform logicalCamera;
+        [SerializeField] private Transform physicalCamera;
+        
+        [SerializeField] private Transform pivot;
+        [SerializeField] private Transform minZoomTarget;
+        [SerializeField] private Transform maxZoomTarget;
+        
+        private float _zoomAmount;
+        
+        /// <summary>
+        /// Rotates the logical camera around the pivot by angle degrees.
+        /// </summary>
+        /// <param name="angle">The amount to rotate, in degrees</param>
+        public void RotateAround(float angle)
+        {
+            logicalCamera.RotateAround(pivot.position, Vector3.up, angle);
+        }
+
+        /// <summary>
+        /// Lerps the physical camera between the min zoom target and the max zoom target by the current zoom + amount
+        /// </summary>
+        /// <param name="amount"></param>
+        public void Zoom(float amount)
+        {
+            _zoomAmount = Mathf.Clamp01(_zoomAmount + amount);
+            physicalCamera.localPosition = Vector3.Lerp(minZoomTarget.localPosition, maxZoomTarget.localPosition, _zoomAmount);
+        }
+    }
+}

Assets/Scripts/PlayerCameraController.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 58db32f794614503b9c8d13bf8729521
+timeCreated: 1690765399