@Robotvac10 

What kind of floor grain do you have? I don't quite understand what the purpose of this need is. Would changing the direction of travel of the robot vacuum make any difference?

And to answer this question, it is NOT supported. 

  @Robotvac10 

I got your point. But actually, simply specifying the direction of departure won't satisfy this idea of yours. The robot vacuum generally moves back and forth in a zig-zag pattern for cleaning and mopping

To meet your vision, the vacuum would need to complete a one-way mopping trip, return to the starting point with no mopping on the return trip, and then move laterally at the starting point before setting off again to complete the one-way mopping trip forward. Cleaning efficiency will be greatly reduced.