[HDRP] Fix camera controller in template with old input system (#4124)

* Fixed the camera controller in the template with the old input system.

* Updated changelog

* Adjust values between two systems

* Fix difference between delta of two input systems

* Updated changelog

* Update SimpleCameraController.cs

Co-authored-by: sebastienlagarde <sebastien@unity3d.com>

Author: alelievr

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -148,6 +148,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed camera preview with multi selection (case 1324126).
 - Fixed a NaN generating in Area light code.
 - Fix potential NaN on apply distortion pass.
+- Fixed the camera controller in the template with the old input system (case 1326816).
 
 ### Changed
 - Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard

com.unity.template-hd/Assets/SampleSceneAssets/Scripts/SimpleCameraController.cs

@@ -65,6 +65,9 @@ public void UpdateTransform(Transform t)
         public float positionLerpTime = 0.2f;
 
         [Header("Rotation Settings")]
+        [Tooltip("Multiplier for the sensitivity of the rotation.")]
+        public float mouseSensitivity = 60.0f;
+
         [Tooltip("X = Change in mouse position.\nY = Multiplicative factor for camera rotation.")]
         public AnimationCurve mouseSensitivityCurve = new AnimationCurve(new Keyframe(0f, 0.5f, 0f, 5f), new Keyframe(1f, 2.5f, 0f, 0f));
 
@@ -188,7 +191,7 @@ void Update()
             // Rotation
             if (IsCameraRotationAllowed())
             {
-                var mouseMovement = GetInputLookRotation() * Time.deltaTime * 5;
+                var mouseMovement = GetInputLookRotation() * Time.deltaTime * mouseSensitivity;
                 if (invertY)
                     mouseMovement.y = -mouseMovement.y;
 
@@ -225,7 +228,6 @@ void Update()
         float GetBoostFactor()
         {
 #if ENABLE_INPUT_SYSTEM
-            // TODO
             return boostFactorAction.ReadValue<Vector2>().y * 0.01f;
 #else
             return Input.mouseScrollDelta.y * 0.01f;
@@ -234,8 +236,12 @@ float GetBoostFactor()
 
         Vector2 GetInputLookRotation()
         {
+            // try to compensate the diff between the two input systems by multiplying with empirical values
 #if ENABLE_INPUT_SYSTEM
-            return lookAction.ReadValue<Vector2>();
+            var delta = lookAction.ReadValue<Vector2>();
+            delta *= 0.5f; // Account for scaling applied directly in Windows code by old input system.
+            delta *= 0.1f; // Account for sensitivity setting on old Mouse X and Y axes.
+            return delta;
 #else
             return new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y") * (invertY ? 1 : -1));
 #endif
@@ -268,7 +274,7 @@ bool IsCameraRotationAllowed()
             canRotate |= Gamepad.current != null ? Gamepad.current.rightStick.ReadValue().magnitude > 0 : false;
             return canRotate;
 #else
-            return Input.GetMouseButtonDown(1);
+            return Input.GetMouseButton(1);
 #endif
         }