Adding code

include/J3ML/LinearAlgebra/Matrix4x4.h

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+#pragma once
+
+
+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, m_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:
+        static const Matrix4x4 Zero;
+        static const Matrix4x4 Identity;
+
+        Vector3 GetTranslationComponent() const;
+        Matrix3x3 GetRotationComponent() const;
+
+        Vector4 GetRow() const;
+        Vector4 GetColumn() const;
+    protected:
+        float elems[4][4];
+    };
+}