Wes xx mediapipe integration

Packages/com.github.homuler.mediapipe/Runtime/Scripts/Unity/Annotation/ConnectionAnnotation.cs

@@ -0,0 +1,41 @@
+// Copyright (c) 2021 homuler
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+namespace Mediapipe.Unity
+{
+  public class ConnectionAnnotation : LineAnnotation
+  {
+    private Connection _currentTarget;
+
+    public bool isEmpty => _currentTarget == null;
+
+    public void Draw(Connection target)
+    {
+      _currentTarget = target;
+
+      if (ActivateFor(_currentTarget))
+      {
+        Draw(_currentTarget.start.gameObject, _currentTarget.end.gameObject);
+      }
+    }
+
+    public void Redraw()
+    {
+      Draw(_currentTarget);
+    }
+
+    protected bool ActivateFor(Connection target)
+    {
+      if (target == null || !target.start.isActiveInHierarchy || !target.end.isActiveInHierarchy)
+      {
+        SetActive(false);
+        return false;
+      }
+      SetActive(true);
+      return true;
+    }
+  }
+}