Add tolerance to IsochroneResource

Author: boldtrn

isochrone/src/main/java/com/graphhopper/isochrone/algorithm/JTSTriangulator.java

@@ -46,7 +46,7 @@ public JTSTriangulator(RouterConfig routerConfig) {
         this.routerConfig = routerConfig;
     }
 
-    public Result triangulate(Snap snap, QueryGraph queryGraph, ShortestPathTree shortestPathTree, ToDoubleFunction<ShortestPathTree.IsoLabel> fz) {
+    public Result triangulate(Snap snap, QueryGraph queryGraph, ShortestPathTree shortestPathTree, ToDoubleFunction<ShortestPathTree.IsoLabel> fz, double tolerance) {
         final NodeAccess na = queryGraph.getNodeAccess();
         Collection<Coordinate> sites = new ArrayList<>();
         shortestPathTree.search(snap.getClosestNode(), label -> {
@@ -81,7 +81,7 @@ public Result triangulate(Snap snap, QueryGraph queryGraph, ShortestPathTree sho
         // what we want.
 
         Collection<ConstraintVertex> constraintVertices = sites.stream().map(ConstraintVertex::new).collect(Collectors.toList());
-        ConformingDelaunayTriangulator conformingDelaunayTriangulator = new ConformingDelaunayTriangulator(constraintVertices, 0.0);
+        ConformingDelaunayTriangulator conformingDelaunayTriangulator = new ConformingDelaunayTriangulator(constraintVertices, tolerance);
         conformingDelaunayTriangulator.setConstraints(new ArrayList<>(), new ArrayList<>());
         conformingDelaunayTriangulator.formInitialDelaunay();
         conformingDelaunayTriangulator.enforceConstraints();

isochrone/src/main/java/com/graphhopper/isochrone/algorithm/Triangulator.java

@@ -38,6 +38,6 @@ public Result(ReadableTriangulation triangulation, Collection<ReadableQuadEdge>
 
     }
 
-    Result triangulate(Snap snap, QueryGraph queryGraph, ShortestPathTree shortestPathTree, ToDoubleFunction<ShortestPathTree.IsoLabel> fz);
+    Result triangulate(Snap snap, QueryGraph queryGraph, ShortestPathTree shortestPathTree, ToDoubleFunction<ShortestPathTree.IsoLabel> fz, double tolerance);
 
 }

web-bundle/src/main/java/com/graphhopper/resources/IsochroneResource.java

@@ -80,7 +80,8 @@ public Response doGet(
             @QueryParam("distance_limit") @DefaultValue("-1") LongParam distanceLimitInMeter,
             @QueryParam("weight_limit") @DefaultValue("-1") LongParam weightLimit,
             @QueryParam("type") @DefaultValue("json") ResponseType respType,
-            @QueryParam("full_geometry") @DefaultValue("false") boolean fullGeometry) {
+            @QueryParam("full_geometry") @DefaultValue("false") boolean fullGeometry,
+            @QueryParam("tolerance") @DefaultValue("0") double tolerance) {
         StopWatch sw = new StopWatch().start();
 
         PMap hintsMap = new PMap();
@@ -140,7 +141,7 @@ public Response doGet(
             fz = l -> l.time;
         }
 
-        Triangulator.Result result = triangulator.triangulate(snap, queryGraph, shortestPathTree, fz);
+        Triangulator.Result result = triangulator.triangulate(snap, queryGraph, shortestPathTree, fz, tolerance);
 
         ContourBuilder contourBuilder = new ContourBuilder(result.triangulation);
         ArrayList<Geometry> isochrones = new ArrayList<>();