143 lines
4.8 KiB
C#
143 lines
4.8 KiB
C#
using System.Text.Json;
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using OSMDatastructure;
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using OSMDatastructure.Graph;
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namespace Pathfinding
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{
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public class RegionManager
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{
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private string workingDirectory { get; }
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private readonly Dictionary<ulong, Region> _regions = new();
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public RegionManager(string workingDirectory)
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{
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this.workingDirectory = workingDirectory;
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}
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public Region? GetRegion(Coordinates coordinates)
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{
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return GetRegion(Coordinates.GetRegionHashCode(coordinates));
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}
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public Region? GetRegion(ulong id)
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{
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if(_regions.TryGetValue(id, out Region? value))
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return value;
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else
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{
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Region? loadedRegion = RegionFromId(id);
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if(loadedRegion is not null)
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_regions.Add(loadedRegion!.regionHash, value: loadedRegion);
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return loadedRegion;
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}
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}
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public Region[] GetAllRegions()
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{
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return this._regions.Values.ToArray();
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}
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private Region? RegionFromFile(string filePath)
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{
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Region? retRegion = null;
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if (File.Exists(filePath))
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{
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FileStream regionFile = new FileStream(filePath, FileMode.Open);
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retRegion = JsonSerializer.Deserialize<Region>(regionFile, Region.serializerOptions)!;
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regionFile.Dispose();
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}
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return retRegion;
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}
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private Region? RegionFromId(ulong regionId)
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{
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string filePath = Path.Join(workingDirectory, $"{regionId}.region");
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return RegionFromFile(filePath);
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}
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public OsmNode? GetNode(ulong nodeId, ulong regionId)
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{
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Region? r = GetRegion(regionId);
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return r?.GetNode(nodeId);
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}
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public bool TestValidConnectionForType(OsmNode node1, OsmNode node2, Tag.SpeedType type)
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{
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foreach (OsmEdge edge in node1.edges)
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{
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if (edge.neighborId.Equals(node2.nodeId))
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return TestValidConnectionForType(node1, edge, type);
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}
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return false;
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}
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public bool TestValidConnectionForType(OsmNode node1, OsmEdge edge, Tag.SpeedType type)
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{
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if (type == Tag.SpeedType.any)
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return true;
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double speed = GetSpeedForEdge(node1, edge.wayId, type);
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if (speed != 0)
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return true;
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return false;
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}
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public OsmNode? ClosestNodeToCoordinates(Coordinates coordinates, Tag.SpeedType vehicle)
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{
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OsmNode? closest = null;
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double distance = double.MaxValue;
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Region? region = GetRegion(coordinates);
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if (region is null)
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return null;
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foreach (OsmNode node in region.nodes)
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{
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bool hasConnectionUsingVehicle = true;
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if (vehicle is not Tag.SpeedType.any)
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{
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hasConnectionUsingVehicle = false;
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foreach (OsmEdge edge in node.edges)
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{
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double speed = GetSpeedForEdge(node, edge.wayId, vehicle);
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if (speed != 0)
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hasConnectionUsingVehicle = true;
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}
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}
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double nodeDistance = Utils.DistanceBetween(node, coordinates);
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if (nodeDistance < distance && hasConnectionUsingVehicle)
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{
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closest = node;
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distance = nodeDistance;
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}
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}
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return closest;
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}
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public double GetSpeedForEdge(OsmNode node1, ulong wayId, Tag.SpeedType vehicle)
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{
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TagManager tags = GetRegion(node1.coordinates)!.tagManager;
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Tag.WayType wayType = (Tag.WayType)tags.GetTag(wayId, Tag.TagType.highway)!;
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switch (vehicle)
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{
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case Tag.SpeedType.pedestrian:
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byte speed = Tag.defaultSpeedPedestrian[wayType];
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if (speed is not 0)
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return speed;
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return 0;
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case Tag.SpeedType.car:
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byte? maxSpeed = (byte?)tags.GetTag(wayId, Tag.TagType.maxspeed);
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if (maxSpeed is not null)
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return (double)maxSpeed;
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maxSpeed = Tag.defaultSpeedCar[wayType];
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if(maxSpeed is not 0)
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return (byte)maxSpeed;
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return 0;
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case Tag.SpeedType.any:
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return 1;
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default:
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return 0;
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}
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}
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}
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} |