Flyfishing is not based on the casting principle of other angling techniques. Insted of a accelerating a blinker with a leader (angling) or using the self-weight of a blinker (spinfishing), the weight of the line is used.
The arm of the rod is angled. It is moved forward and backward in the line of sight. With the aid of the parallel acclerated mass of the line to the surface, more and more of it is swung forward and backward and given from the reel of out of the hand until 5-30 m are in the air to make direct hints. Certainly there are more learnable techniques to copy with different local casting handicaps or to enjoy the aesthetics of an artistic cast.