Code Cleanup

- renamed folder `Assets/SEE/Tools/Videochat/` to `Livekit`

- LivekitVideo.cs
  - edit dokumentation
  - added Debug.LogError if the playerHead cannot be found and then disable the component.
  - added namespace
  - remove unnecessary query in `Update()`
  - `var` has been removed

- LivekitVideoManager.cs
  - `var` has been removed
  - added namespace
  - added #Region
  - added capital letters for public fields
  - removed `_` for identifiers
  - simplified new operator
  - fixed spelling and Grammar
  - fixed indentation

Assets/SEE/Tools/Livekit/LivekitVideo.cs

@@ -0,0 +1,91 @@
+using UnityEngine;
+using Unity.Netcode;
+using SEE.Controls;
+using SEE.Utils;
+
+namespace SEE.Tools.Livekit
+{
+    /// <summary>
+    /// Handles the positioning of the Livekit video stream relative to the player's head.
+    /// </summary>
+    public class LivekitVideo : NetworkBehaviour
+    {
+        /// <summary>
+        /// The Transform representing the player's head.
+        /// </summary>
+        private Transform playerHead;
+
+        /// <summary>
+        /// The bone path leading to the player's head. Used to position the video.
+        /// </summary>
+        private const string FaceCamOrientationBone = "CC_Base_BoneRoot/CC_Base_Hip/CC_Base_Waist/CC_Base_Spine01/CC_Base_Spine02/CC_Base_NeckTwist01/CC_Base_NeckTwist02/CC_Base_Head";
+
+        /// <summary>
+        /// Determines whether the video is in front of the face or above the head.
+        /// True if positioned in front of the face.
+        /// </summary>
+        private bool faceCamOnFront = true;
+
+        /// <summary>
+        /// Offset for positioning the video in front of the player's face.
+        /// </summary>
+        private readonly Vector3 offsetInFrontOfFace = new Vector3(0, 0.065f, 0.15f);
+
+        /// <summary>
+        /// Offset for positioning the video above the player's head.
+        /// </summary>
+        private readonly Vector3 offsetAboveHead = new Vector3(0, 0.35f, 0);
+
+        /// <summary>
+        /// Initializes the player head reference and names the object according to the owner ID.
+        /// Logs an error and disables the component if the player head cannot be found.
+        /// </summary>
+        private void Start()
+        {
+            gameObject.name = "LivekitVideo_" + OwnerClientId;
+            // Localizes the player's head bone for the positioning of the video.
+            playerHead = transform.parent.Find(FaceCamOrientationBone);
+
+            if (playerHead == null)
+            {
+                Debug.LogError($"Player head not found for client ID {OwnerClientId}. Disabling LivekitVideo component.");
+                enabled = false;
+            }
+        }
+
+        /// <summary>
+        /// Updates the position of the video every frame. Toggles the video position based on input.
+        /// </summary>
+        private void Update()
+        {
+            UpdatePosition();
+
+            if (SEEInput.ToggleFaceCamPosition())
+            {
+                faceCamOnFront = !faceCamOnFront;
+            }
+        }
+
+        /// <summary>
+        /// Updates the position and rotation of the video based on the player's head.
+        /// </summary>
+        private void UpdatePosition()
+        {
+            if (faceCamOnFront)
+            {
+                // Position the video in front of the player's face.
+                transform.SetPositionAndRotation(playerHead.TransformPoint(offsetInFrontOfFace), playerHead.rotation);
+            }
+            else
+            {
+                // Position the video above the player's head.
+                transform.position = playerHead.TransformPoint(offsetAboveHead);
+                // If this object is not owned by the local client, make it face the main camera.
+                if (!IsOwner && MainCamera.Camera != null)
+                {
+                    transform.LookAt(MainCamera.Camera.transform);
+                }
+            }
+        }
+    }
+}