130 lines
4.6 KiB
C#
130 lines
4.6 KiB
C#
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using Logging;
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using System.Xml;
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namespace astar
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{
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public class Importer
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{
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public static void Import(Logger logger)
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{
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XmlReader reader = XmlReader.Create(new MemoryStream(osm_data.map));
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reader.MoveToContent();
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Dictionary<UInt64, Node> nodes = new Dictionary<UInt64, Node>();
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nodeType currentNodeType = nodeType.NULL;
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Node nullNode = new Node();
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Node currentNode = nullNode;
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Way currentWay = new Way();
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while (reader.Read())
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{
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if (reader.Name == "node" && reader.IsStartElement())
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{
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currentNodeType = nodeType.NODE;
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nodes.Add(
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Convert.ToUInt64(reader.GetAttribute("id")),
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new Node(
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Convert.ToSingle(reader.GetAttribute("lat")),
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Convert.ToSingle(reader.GetAttribute("lon"))
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)
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);
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}
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else if (reader.Name == "way")
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{
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if(currentNodeType == nodeType.WAY)
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{
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ImportWay(currentWay);
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logger.log("Way nodes: {0}", currentWay.nodes.Count);
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}
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currentNodeType = nodeType.WAY;
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currentNode = nullNode;
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currentWay = new Way();
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reader.GetAttribute("id");
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}else if (reader.Name == "nd" && currentNodeType == nodeType.WAY){
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UInt64 id = Convert.ToUInt64(reader.GetAttribute("ref"));
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if (!nodes.TryGetValue(id, out currentNode))
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{
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logger.log("ERR: Node with id {0} not imported.", id);
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}
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else
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{
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currentWay.nodes.Add(currentNode);
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}
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}else if (reader.Name == "tag")
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{
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if(currentNodeType == nodeType.WAY)
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{
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string value = reader.GetAttribute("v");
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switch (reader.GetAttribute("k"))
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{
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/*case "highway":
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break;*/
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case "oneway":
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switch (value)
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{
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case "yes":
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currentWay.oneway = true;
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break;
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/*case "no":
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currentWay.oneway = false;
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break;*/
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case "-1":
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currentWay.oneway = true;
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currentWay.direction = Way.wayDirection.backward;
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break;
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}
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break;
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/*case "name":
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break;*/
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}
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}
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}
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}
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logger.log("Loaded. Nodes: {0}", nodes.Count);
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}
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internal static void ImportWay(Way way)
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{
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if (way.direction == Way.wayDirection.forward)
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{
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for(int index = 0; index < way.nodes.Count - 1; index++)
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{
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way.nodes[index].edges.Add(new Edge(way.nodes[index + 1]));
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if (!way.oneway)
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way.nodes[index+1].edges.Add(new Edge(way.nodes[index]));
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}
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}
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else
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{
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for (int index = way.nodes.Count-1; index > 1; index--)
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{
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way.nodes[index].edges.Add(new Edge(way.nodes[index - 1]));
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if (!way.oneway)
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way.nodes[index - 1].edges.Add(new Edge(way.nodes[index]));
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}
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}
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}
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internal enum nodeType { NODE, WAY, NULL }
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internal struct Way
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{
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public List<Node> nodes;
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public bool oneway;
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public wayDirection direction;
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public enum wayDirection { forward, backward }
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public Way()
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{
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this.nodes = new List<Node>();
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this.oneway = false;
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this.direction = wayDirection.forward;
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}
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}
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}
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}
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