public void QuadrantDoesntJoinIfWouldBeAboveCapacity()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>(2, 10, 25);
List <ConcurrentGeoQuadtree <object> .IElement> elements = new List <ConcurrentGeoQuadtree <object> .IElement>();
for (int i = 0; i < 10; ++i)
{
elements.Add(quadtree.InsertElement(null, new GeoCoordinates(1, 1)));
}
for (int i = 0; i < 10; ++i)
{
quadtree.InsertElement(null, new GeoCoordinates(-1, -1));
}
quadtree.EfficientlyReindex();
Assert.True(quadtree.GetLargestSubdivisionLevel() >= 1);
// Remove all but one element from the top-right quadrant but not the
// bottom-left quadrant.
foreach (var element in elements.Take(9))
{
quadtree.RemoveElement(element);
}
quadtree.EfficientlyReindex();
Assert.True(quadtree.GetLargestSubdivisionLevel() >= 1);
}
public void QuadrantsJoinWhenAtLowCapacity()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>(1, 10, 25);
List <ConcurrentGeoQuadtree <object> .IElement> elements = new List <ConcurrentGeoQuadtree <object> .IElement>();
for (int i = 0; i < 20; ++i)
{
elements.Add(quadtree.InsertElement(null, new GeoCoordinates(0, 0)));
}
Assert.Equal(0, quadtree.GetLargestSubdivisionLevel());
quadtree.EfficientlyReindex();
int prevSubdivLevel = quadtree.GetLargestSubdivisionLevel();
Assert.True(prevSubdivLevel >= 1);
foreach (var element in elements)
{
quadtree.RemoveElement(element);
}
quadtree.EfficientlyReindex();
Assert.True(quadtree.GetLargestSubdivisionLevel() < prevSubdivLevel);
}
public void CannotMoveRemovedElement()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>();
var element = quadtree.InsertElement(null, new GeoCoordinates(0, 0));
quadtree.RemoveElement(element);
Assert.False(quadtree.MoveElement(element, new GeoCoordinates(1, 1)));
}
public void MovingElementChangesPosition()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>();
var element = quadtree.InsertElement(null, new GeoCoordinates(0, 0));
Assert.True(element.Coordinates.Equals(new GeoCoordinates(0, 0)));
Assert.True(quadtree.MoveElement(element, new GeoCoordinates(1, 1)));
Assert.True(element.Coordinates.Equals(new GeoCoordinates(1, 1)));
}
public void IntersectionTestFindsCorrectData()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>(1, 5, 25);
Random rand = new Random(12345);
List <ConcurrentGeoQuadtree <object> .IElement> inElements = new List <ConcurrentGeoQuadtree <object> .IElement>();
for (int i = 0; i < 10; ++i)
{
inElements.Add(quadtree.InsertElement(null,
new GeoCoordinates(rand.NextDouble() * 5 - 2.5, rand.NextDouble() * 5 - 2.5)));
}
List <ConcurrentGeoQuadtree <object> .IElement> outElements = new List <ConcurrentGeoQuadtree <object> .IElement>();
for (int i = 0; i < 10; ++i)
{
outElements.Add(quadtree.InsertElement(null,
new GeoCoordinates(rand.NextDouble() * 5 + 40, rand.NextDouble() * 5 + 40)));
}
quadtree.EfficientlyReindex();
// All inElements should be in here, no outElements should be in here.
Rect inRect = new Rect(-3, -3, 6, 6);
var foundElements = quadtree.GetElementsInside(inRect.Intersects);
foreach (var elt in inElements)
{
Assert.True(foundElements.Contains(elt));
}
foreach (var elt in outElements)
{
Assert.False(foundElements.Contains(elt));
}
}
public void QuadrantsSubdivideAfterPassingMaxCapacity()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>(1, 10, 25);
Assert.Equal(0, quadtree.GetLargestSubdivisionLevel());
for (int i = 0; i < 20; ++i)
{
quadtree.InsertElement(null, new GeoCoordinates(0, 0));
}
quadtree.EfficientlyReindex();
Assert.True(quadtree.GetLargestSubdivisionLevel() > 0);
}
public void QuadrantsContinueSubdividingAfterCapacityEvenWhenNoInsert()
{
ConcurrentGeoQuadtree <object> quadtree = new ConcurrentGeoQuadtree <object>(1, 10, 25);
for (int i = 0; i < 20; ++i)
{
quadtree.InsertElement(null, new GeoCoordinates(0, 0));
}
Assert.Equal(0, quadtree.GetLargestSubdivisionLevel());
for (int i = 0; i < 10; ++i)
{
quadtree.EfficientlyReindex();
Assert.True(quadtree.GetLargestSubdivisionLevel() > i);
}
}