/// <summary>
/// Adds an edge.
/// </summary>
/// <param name="forward"></param>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="tags"></param>
/// <param name="intermediates"></param>
protected virtual void AddRoadEdge(TagsCollectionBase tags, bool forward, uint from, uint to, List <GeoCoordinateSimple> intermediates)
{
float latitude;
float longitude;
GeoCoordinate fromCoordinate = null;
if (_dynamicGraph.GetVertex(from, out latitude, out longitude))
{ //
fromCoordinate = new GeoCoordinate(latitude, longitude);
}
GeoCoordinate toCoordinate = null;
if (_dynamicGraph.GetVertex(to, out latitude, out longitude))
{ //
toCoordinate = new GeoCoordinate(latitude, longitude);
}
if (fromCoordinate != null && toCoordinate != null)
{ // calculate the edge data.
TEdgeData edgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, forward, fromCoordinate, toCoordinate, intermediates);
_dynamicGraph.AddEdge(from, to, edgeData, intermediates.ToArray(), _edgeComparer);
}
}
/// <summary>
/// Adds an edge.
/// </summary>
/// <param name="forward"></param>
/// <param name="from"></param>
/// <param name="to"></param>
/// <param name="tags"></param>
/// <param name="intermediates"></param>
protected virtual void AddRoadEdge(TagsCollectionBase tags, uint from, uint to, List <GeoCoordinateSimple> intermediates)
{
float latitude;
float longitude;
GeoCoordinate fromCoordinate = null;
if (_dynamicGraph.GetVertex(from, out latitude, out longitude))
{ //
fromCoordinate = new GeoCoordinate(latitude, longitude);
}
GeoCoordinate toCoordinate = null;
if (_dynamicGraph.GetVertex(to, out latitude, out longitude))
{ //
toCoordinate = new GeoCoordinate(latitude, longitude);
}
if (fromCoordinate != null && toCoordinate != null)
{ // calculate the edge data.
TEdgeData existingData;
ICoordinateCollection forwardShape;
if (this.GetEdge(_dynamicGraph, from, to, out existingData, out forwardShape))
{ // oeps, an edge already exists!
if (intermediates != null && intermediates.Count > 0)
{ // add one of the intermediates as new vertex.
uint newVertex;
if (forwardShape != null && forwardShape.Count > 0)
{ // the other edge also has a shape, make sure to also split it.
var existingIntermediates = new List <GeoCoordinateSimple>(forwardShape.ToSimpleArray());
newVertex = _dynamicGraph.AddVertex(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude);
// add edge before.
var beforeEdgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
fromCoordinate, new GeoCoordinate(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude), null);
_dynamicGraph.AddEdge(from, newVertex, beforeEdgeData, null);
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
beforeEdgeData = (TEdgeData)beforeEdgeData.Reverse();
_dynamicGraph.AddEdge(newVertex, from, beforeEdgeData, null);
}
// add edge after.
var afterIntermediates = existingIntermediates.GetRange(1, existingIntermediates.Count - 1);
var afterEdgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
new GeoCoordinate(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude), toCoordinate, afterIntermediates);
_dynamicGraph.AddEdge(newVertex, to, afterEdgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(afterIntermediates.ToArray()));
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
afterIntermediates.Reverse();
afterEdgeData = (TEdgeData)afterEdgeData.Reverse();
_dynamicGraph.AddEdge(to, newVertex, afterEdgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(afterIntermediates.ToArray()));
}
// remove original edge.
_dynamicGraph.RemoveEdge(from, to, existingData);
if (_dynamicGraph.IsDirected && _dynamicGraph.CanHaveDuplicates)
{ // also remove opposite edges.
_dynamicGraph.RemoveEdge(to, from, (TEdgeData)existingData.Reverse());
}
}
newVertex = _dynamicGraph.AddVertex(intermediates[0].Latitude, intermediates[0].Longitude);
var newEdgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
fromCoordinate, new GeoCoordinate(intermediates[0].Latitude, intermediates[0].Longitude), null);
_dynamicGraph.AddEdge(from, newVertex, newEdgeData, null);
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
newEdgeData = (TEdgeData)newEdgeData.Reverse();
_dynamicGraph.AddEdge(newVertex, from, newEdgeData, null);
}
from = newVertex;
fromCoordinate = new GeoCoordinate(intermediates[0].Latitude, intermediates[0].Longitude);
intermediates = intermediates.GetRange(1, intermediates.Count - 1);
}
else
{ // hmm, no intermediates, the other edge should have them.
if (forwardShape != null && forwardShape.Count > 0)
{ // there is a shape, add one of the intermediates as a new vertex.
var existingIntermediates = new List <GeoCoordinateSimple>(forwardShape.ToSimpleArray());
var newVertex = _dynamicGraph.AddVertex(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude);
// add edge before.
var beforeEdgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
fromCoordinate, new GeoCoordinate(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude), null);
_dynamicGraph.AddEdge(from, newVertex, beforeEdgeData, null);
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
beforeEdgeData = (TEdgeData)beforeEdgeData.Reverse();
_dynamicGraph.AddEdge(newVertex, from, beforeEdgeData, null);
}
// add edge after.
var afterIntermediates = existingIntermediates.GetRange(1, existingIntermediates.Count - 1);
var afterEdgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
new GeoCoordinate(existingIntermediates[0].Latitude, existingIntermediates[0].Longitude), toCoordinate, afterIntermediates);
_dynamicGraph.AddEdge(newVertex, to, afterEdgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(afterIntermediates.ToArray()));
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
afterIntermediates.Reverse();
afterEdgeData = (TEdgeData)afterEdgeData.Reverse();
_dynamicGraph.AddEdge(to, newVertex, afterEdgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(afterIntermediates.ToArray()));
}
if (_dynamicGraph.CanHaveDuplicates)
{ // make sure to remove the existing edge if graph allows duplicates.
_dynamicGraph.RemoveEdge(from, to);
if (_dynamicGraph.IsDirected)
{ // also remove the reverse.
_dynamicGraph.RemoveEdge(to, from);
}
}
}
else
{
// do nothing just overwrite what is there, probably a bug in OSM, two overlapping ways, sharing nodes.
}
}
// edge was there already but was removed,split or needs to be replaced.
var edgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
fromCoordinate, toCoordinate, intermediates);
_dynamicGraph.AddEdge(from, to, edgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(intermediates.ToArray()));
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
intermediates.Reverse();
edgeData = (TEdgeData)edgeData.Reverse();
_dynamicGraph.AddEdge(to, from, edgeData, new CoordinateArrayCollection <GeoCoordinateSimple>(intermediates.ToArray()));
}
}
else
{ // edge is not there yet, just add it.
ICoordinateCollection intermediatesCollection = null;
if (intermediates != null)
{
intermediatesCollection = new CoordinateArrayCollection <GeoCoordinateSimple>(intermediates.ToArray());
}
// add new edge.
var edgeData = this.CalculateEdgeData(_interpreter.EdgeInterpreter, _tagsIndex, tags, true,
fromCoordinate, toCoordinate, intermediates);
_dynamicGraph.AddEdge(from, to, edgeData, intermediatesCollection);
if (_dynamicGraph.IsDirected)
{ // also the need to add the reverse edge.
if (intermediates != null)
{
intermediates.Reverse();
intermediatesCollection = new CoordinateArrayCollection <GeoCoordinateSimple>(intermediates.ToArray());
}
edgeData = (TEdgeData)edgeData.Reverse();
_dynamicGraph.AddEdge(to, from, edgeData, intermediatesCollection);
}
}
}
}
/// <summary>
/// Contracts the given vertex.
/// </summary>
/// <param name="vertex"></param>
public void Contract(uint vertex)
{
if (_contracted.Length > vertex && _contracted[vertex])
{
throw new Exception("Is already contracted!");
}
// keep the neighbours.
var neighbours = new HashSet <KeyValuePair <uint, CHEdgeData> >();
// get all information from the source.
var edges = _target.GetEdges(vertex);
// report the before contraction event.
this.OnBeforeContraction(vertex, edges);
// replace the adjacent edges with edges that are point up.
var edgesForContractions = new List <KeyValuePair <uint, CHEdgeData> >(edges.Length);
foreach (var edge in edges)
{
if (!edge.Value.ToLower && !edge.Value.ToHigher)
{ // the edge is not to lower or higher.
// use this edge for contraction.
edgesForContractions.Add(edge);
// overwrite the old edge making it point 'to higher' only.
_target.AddEdge(vertex, edge.Key,
new CHEdgeData(edge.Value.Weight, edge.Value.Forward, edge.Value.Backward, true, edge.Value.ContractedVertexId, edge.Value.Tags), null);
}
}
// loop over each combination of edges just once.
for (int x = 1; x < edgesForContractions.Count; x++)
{ // loop over all elements first.
var xEdge = edgesForContractions[x];
for (int y = 0; y < x; y++)
{ // loop over all elements.
var yEdge = edgesForContractions[y];
// calculate the total weight.
var weight = xEdge.Value.Weight + yEdge.Value.Weight;
// add the combinations of these edges.
if (((xEdge.Value.Backward && yEdge.Value.Forward) ||
(yEdge.Value.Backward && xEdge.Value.Forward)) &&
(xEdge.Key != yEdge.Key))
{ // there is a connection from x to y and there is no witness path.
var witnessXToY = _contractionWitnessCalculator.Exists(_target, xEdge.Key,
yEdge.Key, vertex, weight, int.MaxValue);
var witnessYToX = _contractionWitnessCalculator.Exists(_target, yEdge.Key,
xEdge.Key, vertex, weight, int.MaxValue);
// create x-to-y data and edge.
var dataXToY = new CHEdgeData();
var forward = (xEdge.Value.Backward && yEdge.Value.Forward) &&
!witnessXToY;
var backward = (yEdge.Value.Backward && xEdge.Value.Forward) &&
!witnessYToX;
if ((forward || backward) ||
!_target.ContainsEdge(xEdge.Key, yEdge.Key))
{ // add the edge if there is usefull info or if there needs to be a neighbour relationship.
dataXToY.SetDirection(forward, backward);
dataXToY.Weight = weight;
dataXToY.ContractedVertexId = vertex;
_target.AddEdge(xEdge.Key, yEdge.Key, dataXToY, null, _comparer);
}
}
}
}
// mark the vertex as contracted.
this.MarkContracted(vertex);
// notify a contracted neighbour.
_calculator.NotifyContracted(vertex);
// report the after contraction event.
this.OnAfterContraction(vertex, edges);
}