diff --git a/src/objectBox.cc b/src/objectBox.cc
index f194a1a..90b5670 100644
--- a/src/objectBox.cc
+++ b/src/objectBox.cc
@@ -8,87 +8,95 @@
 #include "objectBox.hh"
 
 
+using charles::basics::Ray;
+using charles::basics::Vector4;
+
+
 namespace charles {
 
+/*
+ * charles::Box::Box --
+ */
 Box::Box()
       /* A unit box centered on the origin. */
-    : Box(Vector3(-0.5, -0.5, -0.5), Vector3(0.5, 0.5, 0.5))
+    : Box(Vector4(-0.5, -0.5, -0.5), Vector4(0.5, 0.5, 0.5))
 { }
 
 
-Box::Box(const Vector3& near, const Vector3& far)
+/*
+ * charles::Box::Box --
+ */
+Box::Box(const Vector4& near,
+         const Vector4& far)
     : Object(),
       mNear(near),
       mFar(far)
 { }
 
 
-Vector3&
+/*
+ * charles::Box::GetNear --
+ */
+Vector4&
 Box::GetNear()
 {
     return mNear;
 }
 
 
+/*
+ * charles::Box::SetNear --
+ */
 void
-Box::SetNear(const Vector3& near)
+Box::SetNear(const Vector4& near)
 {
     mNear = near;
 }
 
 
-Vector3&
+/*
+ * charles::Box::GetFar --
+ */
+Vector4&
 Box::GetFar()
 {
     return mFar;
 }
 
 
+/*
+ * charles::Box::SetFar --
+ */
 void
-Box::SetFar(const Vector3& far)
+Box::SetFar(const Vector4& far)
 {
     mFar = far;
 }
 
 
-bool
-Box::point_is_on_surface(const Vector3& p)
+/*
+ * charles::Box::DoNormal --
+ */
+Vector4
+Box::DoNormal(const Vector4& p)
     const
 {
-    if (p.x == mNear.x || p.x == mFar.x) {
-        return    (p.y > mNear.y && p.y < mFar.y)
-               && (p.z > mNear.z && p.z < mFar.z);
-    } else if (p.y == mNear.y || p.y == mFar.y) {
-        return    (p.x > mNear.x && p.x < mFar.x)
-               && (p.z > mNear.z && p.z < mFar.z);
-    } else if (p.z == mNear.z || p.z == mFar.z) {
-        return    (p.x > mNear.x && p.x < mFar.x)
-               && (p.y > mNear.y && p.y < mFar.y);
-    }
-    return false;
-}
-
-
-Vector3
-Box::compute_normal(const Vector3& p)
-    const
-{
-    if (NearlyEqual(p.x, mNear.x)) {
-        return Vector3(-1, 0, 0);
-    } else if (NearlyEqual(p.x, mFar.x)) {
-        return Vector3(1, 0, 0);
-    } else if (NearlyEqual(p.y, mNear.y)) {
-        return Vector3(0, -1, 0);
-    } else if (NearlyEqual(p.y, mFar.y)) {
-        return Vector3(0, 1, 0);
-    } else if (NearlyEqual(p.z, mNear.z)) {
-        return Vector3(0, 0, -1);
-    } else if (NearlyEqual(p.z, mFar.z)) {
-        return Vector3(0, 0, 1);
+    if (NearlyEqual(p.X(), mNear.X())) {
+        return Vector4(-1, 0, 0);
+    } else if (NearlyEqual(p.X(), mFar.X())) {
+        return Vector4(1, 0, 0);
+    } else if (NearlyEqual(p.Y(), mNear.Y())) {
+        return Vector4(0, -1, 0);
+    } else if (NearlyEqual(p.Y(), mFar.Y())) {
+        return Vector4(0, 1, 0);
+    } else if (NearlyEqual(p.Z(), mNear.Z())) {
+        return Vector4(0, 0, -1);
+    } else if (NearlyEqual(p.Z(), mFar.Z())) {
+        return Vector4(0, 0, 1);
     }
 
     /* TODO: Eventually, I might want to raise an error here. */
-    return Vector3();
+    return Vector4();
 }
 
 
@@ -96,7 +104,7 @@ Box::compute_normal(const Vector3& p)
  * charles::Box::DoIntersect --
  */
 bool
-Box::DoIntersect(const basics::Ray& ray,
+Box::DoIntersect(const Ray& ray,
                  TVector& t,
                  Stats& stats)
     const
@@ -108,17 +116,17 @@ Box::DoIntersect(const basics::Ray& ray,
     Double tNear = -std::numeric_limits<Double>::infinity();
     Double tFar = std::numeric_limits<Double>::infinity();
 
-    if (!IntersectSlab(mNear.x, mFar.x,
+    if (!IntersectSlab(mNear.X(), mFar.X(),
                        ray.origin.X(), ray.direction.X(),
                        tNear, tFar)) {
         return false;
     }
-    if (!IntersectSlab(mNear.y, mFar.y,
+    if (!IntersectSlab(mNear.Y(), mFar.Y(),
                        ray.origin.Y(), ray.direction.Y(),
                        tNear, tFar)) {
         return false;
     }
-    if (!IntersectSlab(mNear.z, mFar.z,
+    if (!IntersectSlab(mNear.Z(), mFar.Z(),
                        ray.origin.Z(), ray.direction.Z(),
                        tNear, tFar)) {
         return false;
diff --git a/src/objectBox.hh b/src/objectBox.hh
index 51a7281..55b3b7b 100644
--- a/src/objectBox.hh
+++ b/src/objectBox.hh
@@ -3,9 +3,11 @@
  * Eryn Wells <eryn@erynwells.me>
  */
 
-#include "basics.h"
-#include "object.h"
-#include "types.hh"
+#ifndef __OBJECTBOX_HH__
+#define __OBJECTBOX_HH__
+
+#include "object.hh"
+#include "basics/basics.hh"
 
 
 namespace charles {
@@ -14,22 +16,20 @@ struct Box
     : public Object
 {
     Box();
-    Box(const Vector3& near, const Vector3& far);
+    Box(const basics::Vector4& near, const basics::Vector4& far);
 
-    Vector3& GetNear();
-    void SetNear(const Vector3& near);
-    Vector3& GetFar();
-    void SetFar(const Vector3& far);
+    basics::Vector4& GetNear();
+    void SetNear(const basics::Vector4& near);
 
-    bool DoesIntersect(const Ray& ray, TVector& t, Stats& stats) const;
-    bool point_is_on_surface(const Vector3 &p) const;
-    Vector3 compute_normal(const Vector3 &p) const;
+    basics::Vector4& GetFar();
+    void SetFar(const basics::Vector4& far);
 
     /** @see charles::Object::Write */
     void Write(std::ostream& ost) const;
 
 protected:
     bool DoIntersect(const basics::Ray& ray, TVector& t, Stats& stats) const;
+    basics::Vector4 DoNormal(const basics::Vector4& p) const;
 
 private:
     /**
@@ -52,10 +52,12 @@ private:
                        Double& tFar) const;
 
     /** The near, lower left corner. */
-    Vector3 mNear;
+    basics::Vector4 mNear;
 
     /** The far, upper right corner. */
-    Vector3 mFar;
+    basics::Vector4 mFar;
 };
 
 } /* namespace charles */
+
+#endif /* __OBJECTBOX_HH__ */