[GraphHopper] turn restrictions

[Bruno Carle]

Thanks Peter,
I am now using the turn_costs branch, my test is still not working, but I
will continue to look at it today
Regards
Bruno


On Mon, Aug 18, 2014 at 6:22 PM, Peter <graphhopper at gmx.de> wrote:

>  Bruno,
>
> please see the turn_costs branch where the turn cost configuration has
> moved into the flagencoder. The API is still under development and the
> branch is not yet merged into master:
>
> new CarFlagEncoder(5,5,1) // enabled for restrictions only
> new CarFlagEncoder(5,5,3) // enabled for turn costs also (this works in
> unit tests but turn costs is currently unused for OSM data)
>
> or from config file the string "car|turnCosts=true" can be used or via
> new EncodingManager("car|turnCosts=true")
>
> see for more details regarding TraversalMode.EDGE_BASED_* and related docs
> in e.g. EdgeBasedRoutingAlgorithmTest
>
> As stated in the docs EDGE_BASED_1DIR should be as fast as the default
> node based traversal but could very rarely produce some unnecessary detours
> when turn restrictions are involved. Use EDGE_BASED_2DIR if you need the
> most precise routes but this is roughly 2 times slower, where
> EDGE_BASED_2DIR_UTURN also considers u-turns and is a lot slower, but I'm
> not sure if this is necessary at all in practise.
>
> Regards,
> Peter.
>
>  Hi Peter,
> I am trying to get the turn restrictions working. But i can not get it to
> route accordingly. Actually I can not find out how to enable it.
> Also I saw that TurnCostStorage.getTurnCost() is never referenced, except
> in some in commented code in GraphhopperStorage... maybe there is no
> Weighting class implemented that takes into account the turn restrictions
> yet?
>
> Here is my test, the turn restriction being tested should prevent us from
> going from Blanicka into Urugayska.
>
>
>     String osmFile= "../../maps/OLD/prague-latest.osm.pbf";
>
>
>     GraphHopper graphHopper=new GraphHopper().setInMemory(true)
>                 .setGraphHopperLocation("/tmp/ghLoc")
>                 .setOSMFile(osmFile)
>                 .disableCHShortcuts()
>                 .setEncodingManager(new EncodingManager("car",4,20));
>
>     graphHopper.importOrLoad();
>
>
>     GHRequest ghRequest=new GHRequest(new GHPoint(50.07483120416,
> 14.4390392303),new GHPoint(50.07333, 14.43869));
>
>     GHResponse ghResponse=graphHopper.route(ghRequest);
>     System.err.println(ghResponse.getPoints());
>
>
>
> route returned :
> http://imgur.com/QWLgoOL
>
>
> Route expected goes around Namesti Miru square:
> http://imgur.com/MftaocZ
>
> Thanks,
> Bruno
>
>
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