diff --git a/AngleAxis.cpp b/AngleAxis.cpp
index 2ed8321..d7d7732 100644
--- a/AngleAxis.cpp
+++ b/AngleAxis.cpp
@@ -5,44 +5,47 @@
 #include "AngleAxis.h"
 
 template <typename T>
-AngleAxis<T>::AngleAxis() {
-  this->angle = AngleOf<T>();
-  this->axis = Direction<T>();
+AngleAxisOf<T>::AngleAxisOf() {
+  this->angle = 0.0F;
+  this->axis = DirectionOf<T>();
 }
 
 template <typename T>
-AngleAxis<T>::AngleAxis(AngleOf<T> angle, Direction<T> axis) {
+AngleAxisOf<T>::AngleAxisOf(float angle, DirectionOf<T> axis) {
   this->angle = angle;
   this->axis = axis;
 }
 
 template <typename T>
-AngleAxis<T>::AngleAxis(float angle, Vector3 axis) {
-  this->angle = AngleOf<T>(angle);
-  this->axis = Direction<T>(axis);
+AngleAxisOf<T>::AngleAxisOf(float angle, Vector3 axis) {
+  this->angle = angle;
+  this->axis = DirectionOf<T>(axis);
 }
 
 template <typename T>
-AngleAxis<T>::AngleAxis(Quaternion q) {
+AngleAxisOf<T>::AngleAxisOf(Quaternion q) {
   float angle;
   Vector3 axis;
   q.ToAngleAxis(&angle, &axis);
-  this->angle = AngleOf<T>(angle);
-  this->axis = Direction<T>(axis);
+  this->angle = angle;
+  this->axis = DirectionOf<T>(axis);
 }
 
 template <typename T>
-Quaternion AngleAxis<T>::ToQuaternion() {
+const AngleAxisOf<T> AngleAxisOf<T>::zero =
+    AngleAxisOf<T>(0.0, DirectionOf<T>(0, 0));
+
+template <typename T>
+Quaternion AngleAxisOf<T>::ToQuaternion() {
   Vector3 axisVector = this->axis.ToVector3();
-  float angleFloat = this->angle.ToFloat();
-  Quaternion q = Quaternion::AngleAxis(angleFloat, axisVector);
+  Quaternion q = Quaternion::AngleAxis(this->angle, axisVector);
   return q;
 }
 
 template <typename T>
-Direction<T> AngleAxis<T>::GetSwing() {
+DirectionOf<T> AngleAxisOf<T>::GetSwing() {
   return this->axis;
 }
 
-template class AngleAxis<float>;
-template class AngleAxis<signed short>;
+template class AngleAxisOf<float>;
+template class AngleAxisOf<signed short>;
diff --git a/AngleAxis.h b/AngleAxis.h
index fbd0ec2..821e774 100644
--- a/AngleAxis.h
+++ b/AngleAxis.h
@@ -12,22 +12,30 @@
 namespace Passer {
 namespace LinearAlgebra {
 
-template <typename T>
-class AngleAxis {
- public:
-  AngleOf<T> angle;
-  Direction<T> axis;
+// Isn't this the same as SphericalOf<T> ?????????????
 
-  AngleAxis();
-  AngleAxis(AngleOf<T> angle, Direction<T> axis);
-  AngleAxis(Quaternion q);
-  AngleAxis(float angle, Vector3 axis);
+template <typename T>
+class AngleAxisOf {
+ public:
+  float angle;
+  DirectionOf<T> axis;
+
+  AngleAxisOf();
+  AngleAxisOf(float angle, DirectionOf<T> axis);
+  AngleAxisOf(Quaternion q);
+  AngleAxisOf(float angle, Vector3 axis);
+
+  const static AngleAxisOf<T> zero;
 
   Quaternion ToQuaternion();
 
-  Direction<T> GetSwing();
+  DirectionOf<T> GetSwing();
 };
 
+using AngleAxisSingle = AngleAxisOf<float>;
+using AngleAxis16 = AngleAxisOf<signed short>;
+using AngleAxis = AngleAxisOf<float>;
+
 }  // namespace LinearAlgebra
 }  // namespace Passer
 using namespace Passer::LinearAlgebra;
diff --git a/Direction.cpp b/Direction.cpp
index f17f271..dac8e50 100644
--- a/Direction.cpp
+++ b/Direction.cpp
@@ -10,45 +10,61 @@
 #include <math.h>
 
 template <typename T>
-Direction<T>::Direction() {
-  this->horizontalAngle = AngleOf<T>(0.0f);
-  this->verticalAngle = AngleOf<T>(0.0f);
+DirectionOf<T>::DirectionOf() {
+  this->horizontal = AngleOf<T>(0.0f);
+  this->vertical = AngleOf<T>(0.0f);
 }
 
 template <typename T>
-Direction<T>::Direction(AngleOf<T> horizontal, AngleOf<T> vertical) {
-  this->horizontalAngle = horizontal;
-  this->verticalAngle = vertical;
+DirectionOf<T>::DirectionOf(AngleOf<T> horizontal, AngleOf<T> vertical) {
+  this->horizontal = horizontal;
+  this->vertical = vertical;
 };
 
 template <typename T>
-Direction<T>::Direction(Vector3 v) {
-  this->horizontalAngle =
+DirectionOf<T>::DirectionOf(Vector3 v) {
+  this->horizontal =
       atan2f(v.Right(), v.Forward()) * Passer::LinearAlgebra::Rad2Deg;
-  this->verticalAngle = 90 - acosf(v.Up()) * Passer::LinearAlgebra::Rad2Deg;
+  this->vertical = 90 - acosf(v.Up()) * Passer::LinearAlgebra::Rad2Deg;
 }
 
 template <typename T>
-const Direction<T> Direction<T>::forward = Direction<T>(0.0f, 0.0f);
+const DirectionOf<T> DirectionOf<T>::forward = DirectionOf<T>(0.0f, 0.0f);
 template <typename T>
-const Direction<T> Direction<T>::back = Direction<T>(180.0f, 0.0f);
+const DirectionOf<T> DirectionOf<T>::back = DirectionOf<T>(180.0f, 0.0f);
 template <typename T>
-const Direction<T> Direction<T>::up = Direction<T>(0.0f, 90.0f);
+const DirectionOf<T> DirectionOf<T>::up = DirectionOf<T>(0.0f, 90.0f);
 template <typename T>
-const Direction<T> Direction<T>::down = Direction<T>(0.0f, -90.0f);
+const DirectionOf<T> DirectionOf<T>::down = DirectionOf<T>(0.0f, -90.0f);
 template <typename T>
-const Direction<T> Direction<T>::left = Direction<T>(-90.0f, 0.0f);
+const DirectionOf<T> DirectionOf<T>::left = DirectionOf<T>(-90.0f, 0.0f);
 template <typename T>
-const Direction<T> Direction<T>::right = Direction<T>(90.0f, 0.0f);
+const DirectionOf<T> DirectionOf<T>::right = DirectionOf<T>(90.0f, 0.0f);
 
 template <typename T>
-Vector3 Direction<T>::ToVector3() {
-  Vector3 v = Quaternion::Euler(-(this->verticalAngle.ToFloat()),
-                                this->horizontalAngle.ToFloat(), 0) *
+DirectionOf<T> Passer::LinearAlgebra::DirectionOf<T>::operator+(
+    const DirectionOf<T>& v) const {
+  DirectionOf<T> r = DirectionOf<T>(this->horizontal + v.horizontal,
+                                    this->vertical + v.vertical);
+  return r;
+}
+
+template <typename T>
+DirectionOf<T> Passer::LinearAlgebra::DirectionOf<T>::operator+=(
+    const DirectionOf<T>& v) {
+  this->horizontal += v.horizontal;
+  this->vertical += v.vertical;
+  return *this;
+}
+
+template <typename T>
+Vector3 DirectionOf<T>::ToVector3() {
+  Vector3 v = Quaternion::Euler(-(this->vertical.InDegrees()),
+                                this->horizontal.InDegrees(), 0) *
               Vector3::forward;
   return v;
 }
 
-template class Direction<float>;
-template class Direction<signed short>;
-template class Direction<signed char>;
\ No newline at end of file
+template class DirectionOf<float>;
+template class DirectionOf<signed short>;
+template class DirectionOf<signed char>;
\ No newline at end of file
diff --git a/Direction.h b/Direction.h
index 6978b0a..348f4d7 100644
--- a/Direction.h
+++ b/Direction.h
@@ -13,25 +13,32 @@ namespace LinearAlgebra {
 struct Vector3;
 
 template <typename T>
-class Direction {
+class DirectionOf {
  public:
-  AngleOf<T> horizontalAngle;
-  AngleOf<T> verticalAngle;
+  AngleOf<T> horizontal;
+  AngleOf<T> vertical;
 
-  Direction();
-  Direction(AngleOf<T> horizontal, AngleOf<T> vertical);
-  Direction(Vector3 v);
+  DirectionOf<T>();
+  DirectionOf<T>(AngleOf<T> horizontal, AngleOf<T> vertical);
+  DirectionOf<T>(Vector3 v);
 
-  const static Direction forward;
-  const static Direction back;
-  const static Direction up;
-  const static Direction down;
-  const static Direction left;
-  const static Direction right;
+  const static DirectionOf forward;
+  const static DirectionOf back;
+  const static DirectionOf up;
+  const static DirectionOf down;
+  const static DirectionOf left;
+  const static DirectionOf right;
+
+  DirectionOf<T> operator+(const DirectionOf<T>& v) const;
+  DirectionOf<T> operator+=(const DirectionOf<T>& v);
 
   Vector3 ToVector3();
 };
 
+using DirectionSingle = DirectionOf<float>;
+using Direction16 = DirectionOf<signed short>;
+using Direction = DirectionOf<float>;
+
 }  // namespace LinearAlgebra
 }  // namespace Passer
 using namespace Passer::LinearAlgebra;