public RouteData Split(RouteData routeData, string routingType)
{
var allRoutePoints = routeData.segments.SelectMany(s => s.latlngzs).ToList();
var coordinates = ToWgs84Coordinates(allRoutePoints);
int maximumPoints = Math.Max(3, Math.Min((int)(new LineString(coordinates).Length / MINIMAL_SEGMENT_LENGTH), MAX_SEGMENTS_NUMBER));
var currentTolerance = MINIMAL_TOLERANCE;
Coordinate[] simplifiedCoordinates;
do
{
simplifiedCoordinates = DouglasPeuckerLineSimplifier.Simplify(coordinates, currentTolerance);
currentTolerance *= 2;
} while (simplifiedCoordinates.Length > maximumPoints);
var manipulatedRouteData = new RouteData
{
segments = new List<RouteSegmentData> { new RouteSegmentData
{
routePoint = allRoutePoints.First(),
latlngzs = new List<LatLngZ> { allRoutePoints.First(), allRoutePoints.First() }
} },
name = routeData.name
};
for (int index = 1; index < simplifiedCoordinates.Length; index++)
{
var currentIndex = coordinates.ToList().IndexOf(simplifiedCoordinates[index]);
coordinates = coordinates.Skip(currentIndex).ToArray();
var latLngz = allRoutePoints.Take(currentIndex + 1).ToList();
allRoutePoints = allRoutePoints.Skip(currentIndex).ToList();
manipulatedRouteData.segments.Add(new RouteSegmentData
{
latlngzs = latLngz,
routePoint = latLngz.Last(),
routingType = routingType
});
}
return manipulatedRouteData;
}
public void SimplifyRouteWithTwoPoints_ShouldNotBeSimplified()
{
var routeToSimplify = new RouteData
{
segments = new List<RouteSegmentData>
{
new RouteSegmentData
{
latlngzs = new List<LatLngZ>
{
new LatLngZ {lat = 1, lng = 1},
new LatLngZ {lat = 2, lng = 2}
}
}
}
};
var route = _service.Split(routeToSimplify, RoutingType.HIKE);
Assert.AreEqual(2, route.segments.Count);
}
public void SimplifyRoundRoute()
{
var routeToSimplify = new RouteData
{
segments = new List<RouteSegmentData>
{
new RouteSegmentData
{
latlngzs = new List<LatLngZ>
{
new LatLngZ {lat = 1, lng = 1},
new LatLngZ {lat = 2, lng = 2},
new LatLngZ {lat = 3, lng = 3},
new LatLngZ {lat = 4, lng = 4},
new LatLngZ {lat = 1, lng = 1},
}
}
}
};
var route = _service.Split(routeToSimplify, RoutingType.HIKE);
Assert.IsTrue(route.segments.Count <= 5);
}
