public SpatialSplitInfo Split(string otherFileName)
{
var latSize = BoundingRect.LatSize;
var lonSize = BoundingRect.LonSize;
var allNodes = ReadAllNodes();
var allWays = ReadAllWays();
var allItems = new List <IMapObject>(nodesCount + waysCount);
allItems.AddRange(allNodes);
allItems.AddRange(allWays);
Comparison <IMapObject> comparison;
var splitByLatitude = latSize >= lonSize;
if (splitByLatitude)
{
comparison = (a, b) => a.MidLat - b.MidLat;
}
else
{
comparison = (a, b) => a.MidLon - b.MidLon;
}
var splitter = new QuickSortSplitter <IMapObject>(Comparer <IMapObject> .Create(comparison));
var position = splitter.Split(allItems, allItems.Count / 100);
var splitValue = splitByLatitude ? allItems[position].MidLat : allItems[position].MidLon;
var task = Task.Run(() =>
{
Clear();
AddAll(this, allItems, 0, position);
});
var other = new SpatialBlock(otherFileName);
AddAll(other, allItems, position, allItems.Count);
task.Wait();
return(new SpatialSplitInfo
{
SplitByLatitude = splitByLatitude,
SplitValue = splitValue,
FirstChild = new SpatialSplitInfo {
Block = this
},
SecondChild = new SpatialSplitInfo {
Block = other
}
});
}
public void TestSplitSubsequences()
{
var rnd = new Random(125);
var arr = new int[1000];
for (var i = 0; i < arr.Length; i++)
{
arr[i] = i % 300;
}
var splitter = new QuickSortSplitter <int>();
var result = splitter.Split(arr);
result.Should().Be(500);
Console.WriteLine($"{splitter.runCount}/{splitter.totalLength}.");
var max = arr.Take(500).Max();
var min = arr.Skip(500).Min();
max.Should().BeLessOrEqualTo(min);
}
