private static GraphData ParseCsv(TextReader tr)
{
GraphData graph = new GraphData();
graph.cellSizeX = double.MaxValue;
graph.cellSizeY = double.MaxValue;
graph.west = GeoCalculator.MaxLongitude;
graph.east = GeoCalculator.MinLongitude;
graph.north = GeoCalculator.MinLongitude;
graph.south = GeoCalculator.MaxLongitude;
Dictionary <int, GraphNode> nodes = new Dictionary <int, GraphNode>();
// Read/skip header
string line = tr.ReadLine();
// Read each data row at a time
while ((line = tr.ReadLine()) != null)
{
string[] cells = line.Split(',');
int sourceId = int.Parse(cells[1]);
int targetId = int.Parse(cells[2]);
if (sourceId == targetId)
{
continue;
}
int value = int.Parse(cells[7]);
float distance = float.Parse(cells[0]);
double x1 = double.Parse(cells[3]);
double y1 = double.Parse(cells[4]);
double x2 = double.Parse(cells[5]);
double y2 = double.Parse(cells[6]);
if (value >= ClassificationValue.Highway)
{
// Use a negative sourceId & targetId to indicate another layer
AddNode(graph, nodes, -sourceId, -targetId, x1, y1, x2, y2, distance, ClassificationValue.Highway);
value -= ClassificationValue.Highway;
}
if (value > 0)
{
AddNode(graph, nodes, sourceId, targetId, x1, y1, x2, y2, distance, value);
}
}
AddHalfSizeToGraph(graph);
GridData tempGrid = new GridData();
graph.InitGrid(tempGrid);
graph.CreateDefaultGrid(tempGrid);
graph.indexToNode.Clear();
double kX = 1.0 / graph.cellSizeX;
double kY = 1.0 / graph.cellSizeY;
foreach (var node in graph.nodes)
{
int index = (int)((node.longitude - graph.west) * kX) + tempGrid.countX * (int)((graph.north - node.latitude) * kY);
if (node.value == ClassificationValue.Highway)
{
index = -index; // highway and other road are on the different layer, they could be overlapped
}
if (!graph.indexToNode.ContainsKey(index))
{
graph.indexToNode.Add(index, node);
}
node.index = index;
}
graph.CreatePotentialNetwork(tempGrid);
return(graph);
}