[GraphHopper] Adding custom weight to edge

[Peter]

Hi Markus,

do you find that all but the starting and ending edges do match or none
at all?

If only starting and ending edges, yes you will have to map the virtual
edges to the real edges like I do in the map matching code in the
fillVirtualEdges with the virtualEdgesMap:
https://github.com/graphhopper/map-matching/blob/master/src/main/java/com/graphhopper/matching/MapMatching.java#L525

(ignore the traverseToClosestRealAdj method for this, as your situation
is not dependent on the direction I think)

Kind Regards,
Peter

On 09.03.2015 14:11, Markus wrote:
> Hi Peter,
>
> Any hint how I get the QueryResult in the calcWeight?
> So far I was using:
>
> public class MyWeighting extends PriorityWeighting {
> ...
> @Override
> public double calcWeight( EdgeIteratorState edgeState, boolean reverse, int 
> prevOrNextEdgeId )
> {
> 	double weight = super.calcWeight(edgeState, reverse, prevOrNextEdgeId);
> 	if (Double.isInfinite(weight))
> 		return Double.POSITIVE_INFINITY;
> 	double tempWeight =weight / (0.5 
> 	+encoder.getDouble(edgeState.getFlags(), KEY));
> 	int calcEdge=edgeState.getEdge();
> 	if(myWeightList.containsKey(calcEdge)) {
> 		//do some calculation
> 		return (myWeight!=0 ? tempWeight*myWeight : tempWeight);
> 	}
> 	else
> 	return tempWeight;
>
> for the creation of myWeightList I'm use
> QueryResult myQR = index.findClosest(tmpPoint.getLat(),tmpPoint.getLon(), 
> EdgeFilter.ALL_EDGES);
> in a different class.
>
> I could use for calcEdge the findClosest() with 
> edgeState.fetchWayGeometry.getLat/getLon and create a QueryResult
> but I guess that is not the way to go. 
>
>
> btw I forgot to mention I'm using Graphhopper 4.0.0, if that is important.
>
> thx Markus
>
> On Monday 09 March 2015 11:07:15 Peter wrote:
>> Hi Markus,
>>
>> you can use a method like this. Try QueryResult.closestEdge.getEdge
>> instead of the edgeIds from the EdgeIterator of that query point as they
>> are 'virtual edges'.
>>
>> But be aware that if you reimport from a new OSM file you will need to
>> re-do the edgeID mapping.
>>
>> Regards,
>> Peter
>>
>> On 08.03.2015 15:07, Markus wrote:
>>> Hey,
>>>
>>> I'm having an Android App and bunch of GPS points I'm loading them
>>> from a server. Each GPS point has a weighting value assigned and should
>>> alter the weight of an edge they belonging to.
>>>
>>> I'm struggling with assigning my data to the right edges to use them for
>>> the path calculation.
>>>
>>> I'm using getLocationIndex() findClosest() and assign the weight to the
>>> edge and store this data in a Map during an AsyncTask.
>>> In the weight calculation I'm checking if the edge in my Map is the same
>>> as
>>> the one graphhopper is handling at the moment and if so add the weighting
>>> to the calculation.
>>>
>>> But the edges stored in the Map are different from the once I get with
>>> getEdge() from EdgeIteratorState (the doc also states that I shouldn't
>>> make
>>> any  assumptions about the concrete values).
>>> Is there a way to get the EdgeID so I can store my information in the Map?
>>>
>>> Is there a nice way to solve that?
>>>
>>>
>>> Thx Markus
>>>