The shadow of the vertical segment (on the plot with the central projection)

To build the perspective of the falling shadow of the vertical segment, we construct the perspectives of the falling shadow of points А _Т and В _T , from the perspective of points А ' and B' we draw perspectives of the light rays A'F ^S and B'F ^S , and from A ' ₁ º B' ₁ ( perspectives of the vertical projection of the vertical line) - the perspective of the horizontal projection of the light beam. The points of intersection of the lines drawn will be the perspectives of the falling shadows of the points A ' _T and B' _T , which determine the perspective of the falling shadow of the vertical segment.