*

Unity/Assets/Scripts/AdvancedPhysics.cs

@@ -0,0 +1,26 @@
+using UnityEngine;
+using System.Collections;
+
+public static class AdvancedPhysics {
+
+	public static void AddTorqueAtPosition(this Rigidbody body, Vector3 torque, Vector3 position, ref Vector3 force, ref Vector3 ortho){
+		Vector3 torqueAxis = torque.normalized;
+		ortho = new Vector3(1,0,0);
+
+		if ( (torqueAxis-ortho).sqrMagnitude < 0.01f ) {
+			ortho = new Vector3(0,1,0);
+		}
+
+		Vector3.OrthoNormalize(ref torqueAxis, ref ortho);
+		force = Vector3.Cross(0.5f * torque, ortho);
+
+		body.AddForceAtPosition (force, position + ortho);
+		body.AddForceAtPosition (-force, position - ortho);
+	}
+
+	public static void AddTorqueAtPosition(this Rigidbody body, Vector3 torque, Vector3 position){
+		Vector3 force = new Vector3 ();
+		Vector3 ortho = new Vector3 ();
+		AddTorqueAtPosition (body, torque, position, ref force, ref ortho);
+	}
+}