Thanks Jakob, I was able to generate a perfect ring road by setting spider.arm to a large number.
As a follow-up question, is there a way to set to a single direction (one-way) road, using similar commands? I did not find a command like this by using netgenerate. Thank you! Best, Jakob Erdmann <namdre.s...@gmail.com> 于2023年5月1日周一 11:58写道： > 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 >> > _______________________________________________ > 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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