diff --git a/include/J3ML/LinearAlgebra/Matrix4x4.h b/include/J3ML/LinearAlgebra/Matrix4x4.h
index b776573..a1a24a2 100644
--- a/include/J3ML/LinearAlgebra/Matrix4x4.h
+++ b/include/J3ML/LinearAlgebra/Matrix4x4.h
@@ -5,25 +5,19 @@
 
 namespace LinearAlgebra {
 
-
-
-
-
-
-
     /// A 4-by-4 matrix for affine transformations and perspective projections of 3D geometry.
-/* This matrix can represent the most generic form of transformations for 3D objects,
- * including perspective projections, which a 4-by-3 cannot store,
- * and translations, which a 3-by-3 cannot represent.
- * The elements of this matrix are
- *  m_00, m_01, m_02, m_03
- *  m_10, m_11, m_12, m_13
- *  m_20, m_21, m_22, xm_23,
- *  m_30, m_31, m_32, m_33
- *
- *  The element m_yx is the value on the row y and column x.
- *  You can access m_yx using the double-bracket notation m[y][x]
- */
+    /* This matrix can represent the most generic form of transformations for 3D objects,
+     * including perspective projections, which a 4-by-3 cannot store,
+     * and translations, which a 3-by-3 cannot represent.
+     * The elements of this matrix are
+     *  m_00, m_01, m_02, m_03
+     *  m_10, m_11, m_12, m_13
+     *  m_20, m_21, m_22, am_23,
+     *  m_30, m_31, m_32, m_33
+     *
+     *  The element m_yx is the value on the row y and column x.
+     *  You can access m_yx using the double-bracket notation m[y][x]
+     */
     class Matrix4x4 {
     public:
         enum { Rows = 4 };
diff --git a/src/J3ML/LinearAlgebra/Matrix3x3.cpp b/src/J3ML/LinearAlgebra/Matrix3x3.cpp
index ecabc4a..f410dcf 100644
--- a/src/J3ML/LinearAlgebra/Matrix3x3.cpp
+++ b/src/J3ML/LinearAlgebra/Matrix3x3.cpp
@@ -228,6 +228,13 @@ namespace LinearAlgebra {
         elems[i][2] = vec.z;
     }
 
+    void Matrix3x3::SetColumn(int i, const Vector3& vec)
+    {
+        elems[0][i] = vec.x;
+        elems[1][i] = vec.y;
+        elems[2][i] = vec.z;
+    }
+
     Matrix3x3
     Matrix3x3::LookAt(const Vector3 &forward, const Vector3 &target, const Vector3 &localUp, const Vector3 &worldUp) {
         // User must input proper normalized input direction vectors