I'll have a look at the pathfinding behavior, thanks.
I think problem could be that the pathfinding don't provide exact results in respect of reproduceable "round time" of an object with given speed.
In the end i want that the object with a given speed produce every round the same time (exact to the thousand of a second) until speed changes.
By the way, how could i set a "next_waypoint" instance variable of a waypoint-sprite (maybe the UID of the next) like a singly-linked list at startup?
Can i loop through a ordered (UID) list of all instances (created with the editor, not programatically) and assign every instance the proper value?
Thx in advance!