When the player has been hit, sets the desired components of the player's velocity to the appropriate gethit velocities.

Required parameters:

- none

Optional parameters:

- x = x_flag (int)
  A nonzero flag means to change that x-component of the player's velocity to the gethit x-velocity.
- y = y_flag (int)
  A nonzero flag means to change that y-component of the player's velocity to the gethit y-velocity.

Notes:

Obsolete

Example:

`none`