Distribution of stellar wind intensity on the surface of the optical component of Cyg X-1 in the radial approximation (CAK model – the uppermost panel), the radial approximation of the radiation-hydrodynamic model in 3D Cartesian grid (the second panel), the non-radial radiation-hydrodynamic solution without the Coriolis force (the third panel) and the full radiation-hydrodynamic solution with the Coriolis force included (the bottom panel). The direction to the L₁-point and the companion has the sidereographic longitude 0°, the longitude 180° is directed towards the L₂-point. The number in the lower right corner of each panel gives the overall outflow of the material from the supergiant in M_⊙   yr^-1.