*

Assets/Scripts/Physics2DEx.cs

@@ -0,0 +1,50 @@
+using UnityEngine;
+using System.Collections;
+
+public static class Physics2DExtensions {
+    public static Vector2 GetWorldPointVelocityEx(this Rigidbody2D body, Vector2 worldPoint) {
+        var physics = body.GetComponent<Physics2DEx>();
+        if (physics != null) {
+            return physics.GetWorldPointVelocity(worldPoint);
+        }
+        return body.GetPointVelocity(worldPoint);
+    }
+}
+
+[RequireComponent(typeof(Rigidbody2D))]
+public class Physics2DEx : MonoBehaviour {
+    private Vector2 _velocity;
+    private float _angularVelocity;
+    public float AngularVelocity {
+        get { return _angularVelocity; }
+    }
+    private Rigidbody2D _rigidBody;
+
+	// Use this for initialization
+	void Start () {
+	    _rigidBody = GetComponent<Rigidbody2D>();
+	}
+
+    void FixedUpdate() {
+        _velocity = _rigidBody.velocity;
+        _angularVelocity = _rigidBody.angularVelocity;
+    }
+
+    public Vector2 GetWorldPointVelocity(Vector2 worldPoint) {
+        if (_rigidBody == null) {
+            _rigidBody = GetComponent<Rigidbody2D>();
+            if (_rigidBody == null) {
+                Debug.LogErrorFormat(gameObject, "Physics2DEx requires component RigidBody2D! {0}", name);
+                return Vector2.zero;
+            }
+        }
+       
+        var radiusVector = worldPoint - _rigidBody.worldCenterOfMass;
+        return (Vector3)_velocity + Vector3.Cross(Vector3.forward * (_angularVelocity * Mathf.Deg2Rad), (Vector3)radiusVector);
+    }
+
+	// Update is called once per frame
+	void Update () {
+	
+	}
+}