Contains the definition of a 4x4 Matrix of doubles, and associated functions to transform it. The matrix is column-major to match OpenGL's interpretation, and it looks like this: <p> m00 m10 m20 m30<br> m01 m11 m21 m31<br> m02 m12 m22 m32<br> m03 m13 m23 m33<br>