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Assets/Photon/Fusion/Runtime/FusionBasicBillboard.cs

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+namespace Fusion {
+  using UnityEngine;
+
+
+  /// <summary>
+  /// Component which automatically faces this GameObject toward the supplied Camera. If Camera == null, will face towards Camera.main.
+  /// </summary>
+  [Fusion.ScriptHelp(BackColor = ScriptHeaderBackColor.Olive)]
+  [ExecuteAlways]
+  public class FusionBasicBillboard : Fusion.Behaviour {
+
+    /// <summary>
+    /// Force a particular camera to billboard this object toward. Leave null to use Camera.main.
+    /// </summary>
+    [InlineHelp]
+    public Camera Camera;
+
+    // Camera find is expensive, so do it once per update for ALL implementations
+    static float _lastCameraFindTime;
+    static Camera _currentCam;
+
+    private void OnEnable() {
+      UpdateLookAt();
+    }
+
+    private void OnDisable() {
+      transform.localRotation = default;
+    }
+
+    Camera MainCamera {
+      set {
+        _currentCam = value;
+      }
+      get {
+
+        var time = Time.time;
+        // Only look for the camera once per Update.
+        if (time == _lastCameraFindTime)
+          return _currentCam;
+
+        _lastCameraFindTime = time;
+        var cam = Camera.main;
+        _currentCam = cam;
+        return cam;
+      }
+    }
+
+#if UNITY_EDITOR
+    private void OnDrawGizmos() {
+      LateUpdate();
+    }
+#endif
+
+    private void LateUpdate() {
+      UpdateLookAt();
+    }
+
+    public void UpdateLookAt() {
+
+      var cam = Camera ? Camera : MainCamera;
+
+      if (cam) {
+        if (enabled) {
+          transform.rotation = cam.transform.rotation;
+        }
+      }
+    }
+
+    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+    static void ResetStatics() {
+      _currentCam = default;
+      _lastCameraFindTime = default;
+    }
+  }
+}