adds function to convert between angle units

shared/src/AngleUtils.h

@@ -32,6 +32,16 @@ struct Rotations
     static float half_pi()  { return 0.25f; }
 };
 
+/**
+ * Converts an angle from one unit to another.
+ */
+template< class UnitFrom, class UnitTo >
+float angleConvert(float a)
+{
+    return a * (UnitTo::half_pi() / UnitFrom::half_pi());
+}
+
+
 /**
  * Clamps an angle to the range of [-180; 180) degrees.
  */