diff --git a/src/camera.cc b/src/camera.cc
index 754d0bc..4e11fa2 100644
--- a/src/camera.cc
+++ b/src/camera.cc
@@ -12,33 +12,34 @@
 #pragma mark - Generic Camera
 
 Camera::Camera()
-    : direction(Vector3::Z),
+    : mDirection(Vector3::Z),
       mRight(1.33, 0, 0),
       mUp(Vector3::Y)
 { }
 
 
+Camera::Camera(const Camera& other)
+  : mDirection(other.mDirection),
+    mRight(other.mRight),
+    mUp(other.mUp)
+{ }
+
+
 Camera::~Camera()
 { }
 
 
-/*
- * Camera::get_direction --
- * Camera::set_direction --
- *
- * Get and set direction vector.
- */
-const Vector3 &
+const Vector3&
 Camera::get_direction()
     const
 {
-    return direction;
+    return mDirection;
 }
 
 void
-Camera::set_direction(const Vector3 &d)
+Camera::set_direction(const Vector3 &direction)
 {
-    direction = d;
+    mDirection = direction;
 }
 
 
diff --git a/src/camera.h b/src/camera.h
index 2552c1f..a058aae 100644
--- a/src/camera.h
+++ b/src/camera.h
@@ -14,11 +14,12 @@
 #include "object.h"
 
 
-class Camera
+struct Camera
     : public Object
 {
 public:
     Camera();
+    Camera(const Camera& other);
     virtual ~Camera();
 
     const Vector3 &get_direction() const;
@@ -35,7 +36,7 @@ public:
 
 private:
     /** A normalized vector defining where the camera is pointed. */
-    Vector3 direction;
+    Vector3 mDirection;
 
     /**
      * A vector defining the width of the camera's image plane. The ratio of