skew2d(a_x, a_y) takes angles $a_x$ and $a_y$, and returns a 2D skew transformation encoded via a $2 \times 2$ matrix.
skew2d(a_x, a_y)
horizontal angle
vertical angle
2D skew matrix
skew2d(a_x, a_y)takes angles $a_x$ and $a_y$, and returns a 2D skew transformation encoded via a $2 \times 2$ matrix.