you generate circles with arbitrary level of detail using netgenerate --spider --spider.omit-center --spider.circle-number 1 --spider.space-radius RADIUS --spider.arm-number DETAIL -R -o circle.net.xml
regards, Jakob Am Mo., 1. Mai 2023 um 10:00 Uhr schrieb Ruud van Gaal <r.vang...@cruden.com >: > Hi Cindy, > > I used the 'repeat' attribute of the 'route' command before to do loops, > instead of using re-routers; that was much easier. That may affect the > outcome of vehicle.getdistance(). > > > * <route id="r_ego" repeat="10000" edges="a b c d" />* > > An alternative is to somehow find out the circle perimeter and modulo the > distance: veh_distance = relative_distance % perimiter. > One other alternative is to consider the ring road a pure circle, then > take both vehicle's forward vectors, generate a circle through those two > points and calculate the circular distance. Mathematically perhaps a bit > more unstable than just using the x/y coordinates and calculating a > distance. I would go for the first method though: try to cut off 1 full > perimeter if the distance seems too large. The hard part is then perhaps > figuring out the perimeter. > > Kind regards, > Ruud > > > On Mon, May 1, 2023 at 6:20 AM Chen Di <dichen...@gmail.com> wrote: > >> Hi, >> >> I have drawn a ring road following this >> <https://sumo.dlr.de/docs/Tutorials/Driving_in_Circles.html> tutorial, >> where gives me a circle that is not perfect (not smooth and the radius at >> different position may vary a bit). I also had re-routers so that vehicles >> drive for multiple rounds. >> >> I need to compute the relative distance between vehicles. I tried the >> function vehice.getdistance(). However, this will give me some errors in >> calculation. For example, if vehicle A in its second round is close to >> vehicle B in its third round, then the relative distance is a large value >> that contains a perimeter of the ring road. >> >> I also thought about using x,y coordinates and the angle, and convert it >> to distance. However, this seems not accurate, given that my ring road is >> not a perfect circle. >> >> I am wondering if there are any good ways to compute relative distance >> correctly in this case. Thanks! >> >> Best, >> Cindy >> _______________________________________________ >> sumo-user mailing list >> sumo-user@eclipse.org >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > sumo-user@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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