public void KdTree2D_NearestNeighbour_Smoke_Test()
{
var distanceCalculator = new DistanceCalculator2D();
var testPts = new List <int[]> {
new int[2] {
3, 6
}, new int[2] {
17, 15
},
new int[2] {
13, 15
}, new int[2] {
6, 12
}, new int[2] {
9, 1
},
new int[2] {
2, 7
}, new int[2] {
10, 19
}
};
var tree = new KDTree <int>(2);
foreach (var pt in testPts)
{
tree.Insert(pt);
}
//IEnumerable tests using linq.
Assert.AreEqual(tree.Count, tree.Count());
int j = testPts.Count - 1;
while (testPts.Count > 0)
{
var testPoint = new int[] { 10, 20 };
var nearestNeigbour = tree.NearestNeighbour(new DistanceCalculator2D(), testPoint);
var actualNeigbour = GetActualNearestNeighbour(testPts, testPoint);
Assert.IsTrue(distanceCalculator.Compare(actualNeigbour, nearestNeigbour, testPoint) == 0);
tree.Delete(testPts[j]);
testPts.RemoveAt(j);
j--;
}
//IEnumerable tests using linq.
Assert.AreEqual(tree.Count, tree.Count());
}
public void KdTree2D_NearestNeighbour_Accuracy_Test()
{
var distanceCalculator = new DistanceCalculator2D();
int nodeCount = 1000;
var rnd = new Random();
var testPts = new List <int[]>();
for (int i = 0; i < nodeCount; i++)
{
var start = i + rnd.Next(0, int.MaxValue - 100);
var end = start + rnd.Next(1, 10);
testPts.Add(new int[] { start, end });
}
var tree = new KDTree <int>(2);
foreach (var pt in testPts)
{
tree.Insert(pt);
}
//IEnumerable tests using linq.
Assert.AreEqual(tree.Count, tree.Count());
int j = testPts.Count - 1;
while (testPts.Count > 0)
{
var testPoint = new int[] { rnd.Next(), rnd.Next() };
var nearestNeigbour = tree.NearestNeighbour(distanceCalculator, testPoint);
var actualNeigbour = GetActualNearestNeighbour(testPts, testPoint);
Assert.IsTrue(distanceCalculator.Compare(actualNeigbour, nearestNeigbour, testPoint) == 0);
tree.Delete(testPts[j]);
testPts.RemoveAt(j);
j--;
}
//IEnumerable tests using linq.
Assert.AreEqual(tree.Count, tree.Count());
}