Using of different weightings

Open Source Routing Engine
1

Hello,

I have created some different weighting e.g. traffic jam, speed, …
I use [this][1] information to write my different classes.

My question is how I can use different weights during runtime?
I overwrite the method in this case

public Weighting createWeighting( final WeightingMap p_map, final FlagEncoder p_encoder )
{
    switch (p_map.getWeighting().toLowerCase())
    {
        case "trafficjam" :
            return new CTrafficJam( p_encoder, this );

        case "forbiddenedge" :
            return new CForbiddenEdge( p_encoder, this );

        default :
            return super.createWeighting( p_map, p_encoder );
    }
}

How can I use the two weights, should I define it on the routing call?
The default weight is “fastest”.

Thanks

Phil

[1]:https://github.com/graphhopper/graphhopper/blob/master/docs/core/weighting.md to

2

I’m not sure if I understand your question properly. It should already work if you disable CH. What exactly is the problem :slight_smile: ?

3

I need to disable CH (okay I don’t do that) and than I run e.g.

GHRequest x = new GHRequest( startgps, endgps );
x.setWeighting("forbiddenedge");

GHResult y = graphhopperinstance.route(x);

to use routing with my definied weight here “forbiddenedge”

Is this the correct way?

Thx

4

Yes & just try it out :slight_smile:

5

Thanks works :smile:

But how can I get access to the weighting object? I would like to call something like

graphhopperinstance.getWeighting( "forbiddenedge" )

I would like to get my CForbiddenEdge object back and would like to use it outside from GraphHopper

Thx

6

What is the use case then? And why not create it ‘outside’ and then pass it in your extended GraphHopper class?

7

My weighting class has got an UI representation (some plotting of the internal weight data within an OSM map) and it is created during the createWeighting call, so I need the current object, which is used by GraphHopper also in the UI

8

Then just inject the necessary parameters right into the Weighting instances and you should be able to change values via UI