Distance between two points on the road (Veins)

[Echo]

Hello Everyone,

I was wondering if I can determine the road shortest distance between two points in Veins, Omnet++. However, I know how to calculate the air distance. Thank you in advance.

Regards,

[David Eckhoff]

hi,

this can be done via traci (distance request (0x59)).

see: http://sumo.dlr.de/wiki/TraCI/Simulation_Value_Retrieval
iirc, its already implemented in veins.

-david

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Dr. David Eckhoff
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[Echo]

Hello David,

Thank you for the response.

I tried the getDistance function from traci command interface. However, I am not getting the correct road distances between two cars. BTW, I am still working on the simple veins map. For example, the distance between two cars on the same line is correct(I have implemented a function for calculating the air distance with pythagora), but when i get the distance between two cars on a different road then the distance is way bigger that it is logical to be. Do you have maybe some explanation for that? Thank you in advance.

Regards,

[朱超]

Hi, Echo

   I also got the problem, the function getDistance() from TraCICommandInterface could not get the correct distance between two nodes. And I do not understand the reason, can someone explain this?

   However, you can use the function in Coord class. For example, if you want get the distance from Coord a to Coord b, you can use a.distance(b) to get the distance between them.

Br,

Chao

在 2016年3月29日星期二 UTC+3下午7:18:15，Echo写道：

[Echo]

Hello Chao,

You have to make sure that the input coordinates are accurate. By accurate I mean that the input coordinates are really a coordinates from the road. The best way to do that is by getting the coordinates of the vehicles that are already driving on the map.

Cheers,

[h rahmatzehi]

Hi 

How I can calculate the length of the road?

در جمعه 25 مارس 2016، ساعت 20:14:55 (UTC+4:30)، Echo نوشته:

[Echo]

Hello,

You can determine the road length between two points by using the following function:

double getDistance(const Coord& position1, const Coord& position2, bool returnDrivingDistance);

As you can see, you input the first and the second coordinate. Next, if you set the returnDrivingDistance to true the function will return the driving distance. Otherwise, it will return the euclidean distance between the points.

I hope that helps.

Cheers,

Tomo