public void Should_Insert_MaxHeap()
{
//arrange
var result = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
//act
result.Insert(100);
result.Insert(19);
result.Insert(36);
result.Insert(17);
result.Insert(3);
result.Insert(25);
result.Insert(1);
result.Insert(2);
result.Insert(7);
//assert
result.Count.ShouldBeEquivalentTo(9);
result.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
result.Root.Data.ShouldBeEquivalentTo(100);
result.Root.Left.Data.ShouldBeEquivalentTo(19);
result.Root.Right.Data.ShouldBeEquivalentTo(36);
result.Root.Left.Left.Data.ShouldBeEquivalentTo(17);
result.Root.Left.Right.Data.ShouldBeEquivalentTo(3);
result.Root.Right.Left.Data.ShouldBeEquivalentTo(25);
result.Root.Right.Right.Data.ShouldBeEquivalentTo(1);
result.Root.Left.Left.Left.Data.ShouldBeEquivalentTo(2);
result.Root.Left.Left.Right.Data.ShouldBeEquivalentTo(7);
}
public void Should_Check_ExtractTop_MaxHeap()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
heap.Insert(100);
heap.Insert(19);
heap.Insert(36);
heap.Insert(17);
heap.Insert(3);
heap.Insert(25);
heap.Insert(1);
heap.Insert(2);
heap.Insert(7);
//act
var result = heap.ExtractTop();
//assert
result.ShouldBeEquivalentTo(100);
heap.Count.ShouldBeEquivalentTo(8);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
heap.Root.Data.ShouldBeEquivalentTo(36);
heap.Root.Left.Data.ShouldBeEquivalentTo(19);
heap.Root.Right.Data.ShouldBeEquivalentTo(25);
heap.Root.Left.Left.Data.ShouldBeEquivalentTo(17);
heap.Root.Left.Right.Data.ShouldBeEquivalentTo(3);
heap.Root.Right.Left.Data.ShouldBeEquivalentTo(7);
heap.Root.Right.Right.Data.ShouldBeEquivalentTo(1);
heap.Root.Left.Left.Left.Data.ShouldBeEquivalentTo(2);
heap.Root.Left.Left.Right.ShouldBeEquivalentTo(null);
}
public void Should_Check_ExtractTop_MinHeap()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MinHeap);
heap.Insert(1);
heap.Insert(50);
heap.Insert(23);
heap.Insert(88);
heap.Insert(90);
heap.Insert(32);
heap.Insert(74);
heap.Insert(96);
//act
var result = heap.ExtractTop();
//assert
result.ShouldBeEquivalentTo(1);
heap.Count.ShouldBeEquivalentTo(7);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MinHeap);
heap.Root.Data.ShouldBeEquivalentTo(23);
heap.Root.Left.Data.ShouldBeEquivalentTo(50);
heap.Root.Right.Data.ShouldBeEquivalentTo(32);
heap.Root.Left.Left.Data.ShouldBeEquivalentTo(88);
heap.Root.Left.Right.Data.ShouldBeEquivalentTo(90);
heap.Root.Right.Left.Data.ShouldBeEquivalentTo(96);
heap.Root.Right.Right.Data.ShouldBeEquivalentTo(74);
}
public void Should_Insert_MinHeap()
{
//arrange
var result = new MyBinaryHeap <int>(MyBinaryHeapType.MinHeap);
//act
result.Insert(4);
result.Insert(50);
result.Insert(7);
result.Insert(55);
result.Insert(90);
result.Insert(87);
result.Insert(2);
//assert
result.Count.ShouldBeEquivalentTo(7);
result.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MinHeap);
result.Root.Data.ShouldBeEquivalentTo(2);
result.Root.Left.Data.ShouldBeEquivalentTo(50);
result.Root.Right.Data.ShouldBeEquivalentTo(4);
result.Root.Left.Left.Data.ShouldBeEquivalentTo(55);
result.Root.Left.Right.Data.ShouldBeEquivalentTo(90);
result.Root.Right.Left.Data.ShouldBeEquivalentTo(87);
result.Root.Right.Right.Data.ShouldBeEquivalentTo(7);
}
private void Insert(int node)
{
var box = _tree.GetAabb(node);
Vector3D tmp;
Vector3D.Clamp(ref _vec, ref box.Min, ref box.Max, out tmp);
var dist = Vector3D.DistanceSquared(tmp, _vec);
_tmp.Insert(node, dist);
}
private Dictionary <T, T?> ComputePaths(T source, MyGraphAdj <T> graph)
{
var vertexes = graph.GetAllVertexes().ToList();
var edges = graph.GetAllEdges().ToList();
Dictionary <T, int> distances = new Dictionary <T, int>();
Dictionary <T, T?> parent = new Dictionary <T, T?>();
Dictionary <T, int> heapMinDistances = new Dictionary <T, int>();
var heap = new MyBinaryHeap <MyBinaryHeapKeyNode <T, int> >(MyBinaryHeapType.MinHeap);
foreach (var vertex in vertexes)
{
heap.Insert(new MyBinaryHeapKeyNode <T, int>(vertex.Key, vertex.Key.CompareTo(source) == 0 ? 0 : Int32.MaxValue));
heapMinDistances.Add(vertex.Key, Int32.MaxValue);
}
parent[source] = null;
distances[source] = 0;
while (heap.Count > 0)
{
var current = heap.ExtractTop();
var nodes = edges.Where(x => x[0].Equals(
vertexes.First(y => y.Key.CompareTo(current.Key) == 0).Value)).ToList();
if (nodes.Count == 0)
{
break;
}
var parentNode = vertexes.First(x => x.Key.CompareTo(current.Key) == 0);
foreach (var node in nodes)
{
var vertex = vertexes.First(x => x.Value == node[1]);
if (!heap.Contains(new MyBinaryHeapKeyNode <T, int>(vertex.Key, vertex.Value)))
{
continue;
}
var currentDistance = edges.First(x =>
x[0] == parentNode.Value && x[1] == vertex.Value)[2];
distances[vertex.Key] = distances[current.Key] + currentDistance;
if (heapMinDistances[vertex.Key] >= distances[vertex.Key])
{
parent[vertex.Key] = current.Key;
heap.Decrease(new MyBinaryHeapKeyNode <T, int>(vertex.Key, Int32.MaxValue),
new MyBinaryHeapKeyNode <T, int>(vertex.Key, currentDistance));
heapMinDistances[vertex.Key] = currentDistance;
}
}
}
return(parent);
}
public void Should_Decrease_Min_Heap()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MinHeap);
heap.Insert(6);
heap.Insert(7);
heap.Insert(12);
heap.Insert(10);
heap.Insert(15);
heap.Insert(17);
//act
heap.Decrease(10, 2);
//assert
heap.Root.Data.ShouldBeEquivalentTo(2);
heap.Root.Left.Data.ShouldBeEquivalentTo(6);
heap.Root.Right.Data.ShouldBeEquivalentTo(12);
heap.Root.Left.Left.Data.ShouldBeEquivalentTo(7);
heap.Root.Left.Right.Data.ShouldBeEquivalentTo(15);
heap.Root.Right.Left.Data.ShouldBeEquivalentTo(17);
heap.Count.ShouldBeEquivalentTo(6);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MinHeap);
}
public void Should_Check_ExtractTop_MinHeap_Multiple()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MinHeap);
heap.Insert(1);
heap.Insert(3);
heap.Insert(6);
heap.Insert(5);
heap.Insert(9);
heap.Insert(8);
//act
//assert
heap.ExtractTop().ShouldBeEquivalentTo(1);
heap.ExtractTop().ShouldBeEquivalentTo(3);
heap.ExtractTop().ShouldBeEquivalentTo(5);
heap.ExtractTop().ShouldBeEquivalentTo(6);
heap.ExtractTop().ShouldBeEquivalentTo(8);
heap.ExtractTop().ShouldBeEquivalentTo(9);
heap.Root.ShouldBeEquivalentTo(null);
heap.Count.ShouldBeEquivalentTo(0);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MinHeap);
}
public void InsertMyBinaryHeapTest()
{
//Assign
var val = new List <int>()
{
9, 6, 5, 2, 3
};
var expected = new List <int>()
{
0, 1, 3, 2, 6, 9, 5
};
var myBinaryHeap = new MyBinaryHeap <int>();
//Act
myBinaryHeap.BuildHeapList(val);
var result = myBinaryHeap.Insert(1);
//Assert
CollectionAssert.AreEqual(expected, result, "Result differs with what is expected");
}
public IEnumerable <T> HeapSort(IEnumerable <T> list)
{
if (list == null)
{
throw new ArgumentNullException();
}
var array = list.ToArray();
var heap = new MyBinaryHeap <T>(MyBinaryHeapType.MinHeap);
foreach (var item in array)
{
heap.Insert(item);
}
while (heap.Count > 0)
{
yield return(heap.ExtractTop());
}
}
public void Should_Throw_Decrease_If_Lower_Value_MaxHeap()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
heap.Insert(17);
heap.Insert(15);
heap.Insert(10);
heap.Insert(6);
heap.Insert(10);
heap.Insert(7);
//act
Action act = () => heap.Decrease(17, 11);
//assert
act.ShouldThrow <ArgumentException>();
heap.Count.ShouldBeEquivalentTo(6);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
}
public void Should_Check_Contains_True()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
heap.Insert(17);
heap.Insert(15);
heap.Insert(10);
heap.Insert(6);
heap.Insert(10);
heap.Insert(7);
//act
var result = heap.Contains(10);
//assert
result.ShouldBeEquivalentTo(true);
heap.Count.ShouldBeEquivalentTo(6);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
}
public void Should_Throw_Decrease_If_Not_Contains()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
heap.Insert(17);
heap.Insert(15);
heap.Insert(10);
heap.Insert(6);
heap.Insert(10);
heap.Insert(7);
heap.ExtractTop();
//act
Action act = () => heap.Decrease(17, 11);
//assert
act.ShouldThrow <InvalidOperationException>();
heap.Count.ShouldBeEquivalentTo(5);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
}
public void Should_Check_ExtractTop_Insert_MaxHeap_Multiple()
{
//arrange
var heap = new MyBinaryHeap <int>(MyBinaryHeapType.MaxHeap);
heap.Insert(17);
heap.Insert(15);
heap.Insert(10);
heap.Insert(6);
heap.Insert(10);
heap.Insert(7);
heap.ExtractTop();
heap.ExtractTop();
heap.ExtractTop();
//act
heap.Insert(1);
heap.Insert(2);
heap.Insert(3);
heap.Insert(11);
heap.Insert(6);
//assert
heap.Root.Data.ShouldBeEquivalentTo(11);
heap.Root.Left.Data.ShouldBeEquivalentTo(7);
heap.Root.Right.Data.ShouldBeEquivalentTo(10);
heap.Root.Left.Left.Data.ShouldBeEquivalentTo(6);
heap.Root.Left.Right.Data.ShouldBeEquivalentTo(2);
heap.Root.Right.Left.Data.ShouldBeEquivalentTo(3);
heap.Root.Right.Right.Data.ShouldBeEquivalentTo(6);
heap.Root.Left.Left.Left.Data.ShouldBeEquivalentTo(1);
heap.Count.ShouldBeEquivalentTo(8);
heap.HeapType.ShouldBeEquivalentTo(MyBinaryHeapType.MaxHeap);
}
internal void EnqueueCorrectionExpiration(MyGridPhysics.PredictiveDestructionData data)
{
var time = Now + MyGridPhysics.PredictiveDestructionData.ExpirationTime;
m_predictiveDestructionUpdate.Insert(data, time);
}
public MyPath <V> FindPath(V start, V end, Predicate <V> vertexTraversable = null, Predicate <IMyPathEdge <V> > edgeTraversable = null)
{
// CH: TODO: Make multiple private copies of this method and call the right one
// according to what were the arguments to the public interface method
CalculateNextTimestamp();
MyPathfindingData startData = start.PathfindingData;
Visit(startData);
startData.Predecessor = null;
startData.PathLength = 0.0f;
IMyPathVertex <V> retVal = null;
float shortestPathLength = float.PositiveInfinity;
m_openVertices.Insert(start.PathfindingData, start.EstimateDistanceTo(end));
while (m_openVertices.Count > 0)
{
MyPathfindingData currentData = m_openVertices.RemoveMin();
V current = currentData.Parent as V;
float currentPathLength = currentData.PathLength;
if (retVal != null && currentPathLength >= shortestPathLength)
{
break;
}
for (int i = 0; i < current.GetNeighborCount(); ++i)
{
/*IMyPathVertex<V> neighbor = current.GetNeighbor(i);
* if (neighbor == null) continue;*/
IMyPathEdge <V> edge = current.GetEdge(i);
if (edge == null || (edgeTraversable != null && !edgeTraversable(edge)))
{
continue;
}
V neighbor = edge.GetOtherVertex(current);
if (neighbor == null || (vertexTraversable != null && !vertexTraversable(neighbor)))
{
continue;
}
float newPathLength = currentData.PathLength + edge.GetWeight();
MyPathfindingData neighborData = neighbor.PathfindingData;
if (neighbor == end && newPathLength < shortestPathLength)
{
retVal = neighbor;
shortestPathLength = newPathLength;
}
if (Visited(neighborData))
{
if (newPathLength < neighborData.PathLength)
{
neighborData.PathLength = newPathLength;
neighborData.Predecessor = currentData;
m_openVertices.ModifyUp(neighborData, newPathLength + neighbor.EstimateDistanceTo(end));
}
}
else
{
Visit(neighborData);
neighborData.PathLength = newPathLength;
neighborData.Predecessor = currentData;
m_openVertices.Insert(neighborData, newPathLength + neighbor.EstimateDistanceTo(end));
}
}
}
m_openVertices.Clear();
if (retVal == null)
{
return(null);
}
else
{
return(ReturnPath(retVal.PathfindingData, null, 0));
}
}