Does GraphHopper support dynamic edge weights?

Question

We are thinking to use it in our project where we need to do a route planner. The first problem we had is that we have very dyanimc variables representing our weight values;

Answer 1

To modify the speed or distance of an edge you need to get an EdgeIteratorState (e.g. from a coordinate) and then set the flags or distance. Here is a code snippet:

// find edge for lat,lon point
QueryResult qr = locationIndex.findClosest(lat, lon, EdgeFilter.ALL_EDGES);
if(!qr.isValid())
      throw RuntimeException("Cannot find nearby location " + lat+","+lon);
EdgeIteratorState edge = qr.getClosestEdge();
// use existing flags to reuse access information
long existingFlags = edge.getFlags();
// set speed
edge.setFlags(carFlagEncoder.setSpeed(existingFlags, newSpeed));
// set distance
edge.setDistance(newDistance);