Wes xx mediapipe integration

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

@@ -0,0 +1,90 @@
+// 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.
+
+using UnityEngine;
+
+namespace Mediapipe.Unity
+{
+#pragma warning disable IDE0065
+  using Color = UnityEngine.Color;
+#pragma warning restore IDE0065
+
+  public class CircleAnnotation : HierarchicalAnnotation
+  {
+    [SerializeField] private LineRenderer _lineRenderer;
+    [SerializeField] private Color _color = Color.green;
+    [SerializeField, Range(0, 1)] private float _lineWidth = 1.0f;
+
+    private void OnEnable()
+    {
+      ApplyColor(_color);
+      ApplyLineWidth(_lineWidth);
+    }
+
+    private void OnDisable()
+    {
+      ApplyLineWidth(0.0f);
+      _lineRenderer.positionCount = 0;
+      _lineRenderer.SetPositions(new Vector3[] { });
+    }
+
+#if UNITY_EDITOR
+    private void OnValidate()
+    {
+      if (!UnityEditor.PrefabUtility.IsPartOfAnyPrefab(this))
+      {
+        ApplyColor(_color);
+        ApplyLineWidth(_lineWidth);
+      }
+    }
+#endif
+
+    public void SetColor(Color color)
+    {
+      _color = color;
+      ApplyColor(color);
+    }
+
+    public void SetLineWidth(float lineWidth)
+    {
+      _lineWidth = lineWidth;
+      ApplyLineWidth(lineWidth);
+    }
+
+    public void Draw(Vector3 center, float radius, int vertices = 128)
+    {
+      var start = new Vector3(radius, 0, 0);
+      var positions = new Vector3[vertices];
+
+      for (var i = 0; i < positions.Length; i++)
+      {
+        var q = Quaternion.Euler(0, 0, i * 360 / positions.Length);
+        positions[i] = (q * start) + center;
+      }
+
+      _lineRenderer.positionCount = positions.Length;
+      _lineRenderer.SetPositions(positions);
+    }
+
+    private void ApplyColor(Color color)
+    {
+      if (_lineRenderer != null)
+      {
+        _lineRenderer.startColor = color;
+        _lineRenderer.endColor = color;
+      }
+    }
+
+    private void ApplyLineWidth(float lineWidth)
+    {
+      if (_lineRenderer != null)
+      {
+        _lineRenderer.startWidth = lineWidth;
+        _lineRenderer.endWidth = lineWidth;
+      }
+    }
+  }
+}