Added smoothing on the download bar, reducing jitter.

LightlessSync/UI/DownloadUi.cs

@@ -17,6 +17,7 @@ public class DownloadUi : WindowMediatorSubscriberBase
 {
     private readonly LightlessConfigService _configService;
     private readonly ConcurrentDictionary<GameObjectHandler, Dictionary<string, FileDownloadStatus>> _currentDownloads = new();
+    private readonly Dictionary<GameObjectHandler, Vector2> _smoothed = [];
     private readonly DalamudUtilService _dalamudUtilService;
     private readonly FileUploadManager _fileTransferManager;
     private readonly UiSharedService _uiShared;
@@ -195,8 +196,19 @@ public class DownloadUi : WindowMediatorSubscriberBase
 
             foreach (var transfer in _currentDownloads.ToList())
             {
-                var screenPos = _dalamudUtilService.WorldToScreen(transfer.Key.GetGameObject());
+                var transferKey = transfer.Key;
-                if (screenPos == Vector2.Zero) continue;
+                var rawPos = _dalamudUtilService.WorldToScreen(transferKey.GetGameObject());
+
+                //If RawPos is zero, remove it from smoothed dictionary
+                if (rawPos == Vector2.Zero)
+                {
+                    _smoothed.Remove(transferKey);
+                    continue;
+                }
+
+                //Smoothing out the movement and fix jitter around the position.
+                Vector2 screenPos = _smoothed.TryGetValue(transferKey, out var lastPos) ? (rawPos - lastPos).Length() < 4f ? lastPos : rawPos : rawPos;
+                _smoothed[transferKey] = screenPos;
 
                 var totalBytes = transfer.Value.Sum(c => c.Value.TotalBytes);
                 var transferredBytes = transfer.Value.Sum(c => c.Value.TransferredBytes);