position
Gets the position or translation component of this 4x4 matrix.
For a row-major matrix, this vector is extracted directly from the first three elements of the fourth column: (m03, m13, m23). These elements represent the translation (Tx, Ty, Tz) applied by the transformation.
It assumes the matrix is an affine transformation matrix where the last row is (0, 0, 0, 1).
Return
A Vector3 representing the translation component of the matrix.