private E GetOriginalEdgeInstance(BaseVertex startVertexForEdge, BaseVertex endVertexForEdge)
{
string startVertexId = idMapper.GetBackThePreviouslyStoredGeneralStringIdForInteger(startVertexForEdge.GetId());
string endVertexId = idMapper.GetBackThePreviouslyStoredGeneralStringIdForInteger(endVertexForEdge.GetId());
return(base.GetOriginalEdgeInstance(startVertexId, endVertexId));
}
public string predictAccentsWithMultiMatches(string sentence, int nResults, bool getWeight = true)
{
LinkedHashMap <string, double> output = new LinkedHashMap <string, double>();
string @in = Utils.normaliseString(sentence);
string lowercaseIn = @in.ToLower();
string[] words = ("0 " + lowercaseIn + " 0").Split(' ');
Graph graph = new VariableGraph();
Dictionary <int, string> idxWordMap = new Dictionary <int, string>();
int index = 0;
int[] numberP = new int[words.Length];
string[,] possibleChange = new string[words.Length, maxp];
int[,] indices = new int[words.Length, maxp];
int nVertex = 0;
index = buildGraph(words, graph, idxWordMap, index, numberP, possibleChange, indices, nVertex);
//Yen Algorithm for kShortestPaths
YenTopKShortestPathsAlg yenAlg = new YenTopKShortestPathsAlg(graph);
List <Accent.KShortestPaths.Model.Path> shortest_paths_list = yenAlg.get_shortest_paths(graph.get_vertex(0), graph.get_vertex(index - 1), nResults);
foreach (Accent.KShortestPaths.Model.Path path in shortest_paths_list)
{
List <BaseVertex> pathVertex = path.get_vertices();
string text = "";
for (int i = 1; i < pathVertex.Count - 1; i++)
{
BaseVertex vertext = pathVertex[i];
text += idxWordMap[vertext.get_id()] + " ";
if (text.Contains("đầm dáng"))
{
text.Replace("đầm dáng", "đảm đang");
}
if (text.Contains("chào bán"))
{
text = Regex.Replace(text, "chào bán", "chào bạn");
}
if (text.Contains("bị đầu tay"))
{
text = Regex.Replace(text, "bị đầu tay", "bị đau tay");
}
if (text.Contains("tay tôi bị đầu"))
{
text = Regex.Replace(text, "tay tôi bị đầu", "tay tôi bị đau");
}
}
output.Add(processOutput(@in, text.Trim()), path.get_weight());
}
// Không lấy trọng số đo lường cho các trường hợp thêm dấu.
if (!getWeight)
{
return(output.ToString2());
}
return(output.ToString());
}
/**
* Do the work
*/
protected void DetermineShortestPaths(BaseVertex sourceVertex,
BaseVertex sinkVertex, bool isSource2sink)
{
// 0. clean up variables
Clear();
// 1. initialize members
BaseVertex endVertex = isSource2sink ? sinkVertex : sourceVertex;
BaseVertex startVertex = isSource2sink ? sourceVertex : sinkVertex;
startVertexDistanceIndex.Add(startVertex, 0d);
startVertex.SetWeight(0d);
vertexCandidateQueue.add(startVertex, startVertex.GetWeight());
// 2. start searching for the shortest path
while (!vertexCandidateQueue.isEmpty())
{
BaseVertex curCandidate = vertexCandidateQueue.poll();
if (curCandidate.Equals(endVertex))
{
break;
}
determinedVertexSet.Add(curCandidate);
UpdateVertex(curCandidate, isSource2sink);
}
}
/**
* Update the distance from the source to the concerned vertex.
* @param vertex
*/
private void UpdateVertex(BaseVertex vertex, bool isSource2sink)
{
// 1. get the neighboring vertices
ISet <BaseVertex> neighborVertexList = isSource2sink ?
graph.GetAdjacentVertices(vertex) : graph.GetPrecedentVertices(vertex);
// 2. update the distance passing on current vertex
foreach (BaseVertex curAdjacentVertex in neighborVertexList)
{
// 2.1 skip if visited before
if (determinedVertexSet.Contains(curAdjacentVertex))
{
continue;
}
// 2.2 calculate the new distance
double distance = startVertexDistanceIndex.ContainsKey(vertex)?
startVertexDistanceIndex[vertex] : Graph.DISCONNECTED;
distance += isSource2sink ? graph.GetEdgeWeight(vertex, curAdjacentVertex)
: graph.GetEdgeWeight(curAdjacentVertex, vertex);
// 2.3 update the distance if necessary
if (!startVertexDistanceIndex.ContainsKey(curAdjacentVertex) ||
startVertexDistanceIndex[curAdjacentVertex] > distance)
{
startVertexDistanceIndex.AddOrReplace(curAdjacentVertex, distance);
predecessorIndex.AddOrReplace(curAdjacentVertex, vertex);
curAdjacentVertex.SetWeight(distance);
vertexCandidateQueue.add(curAdjacentVertex, curAdjacentVertex.GetWeight());
}
}
}
/// <summary>
/// Update the distance from the source to the concerned vertex. </summary>
/// <param name="vertex"> </param>
private void _improve_to_vertex(BaseVertex vertex, bool is_source2sink)
{
// 1. get the neighboring vertices
HashSet <BaseVertex> neighbor_vertex_list = is_source2sink ? _graph.get_adjacent_vertices(vertex) : _graph.get_precedent_vertices(vertex);
// 2. update the distance passing on current vertex
foreach (BaseVertex cur_adjacent_vertex in neighbor_vertex_list)
{
// 2.1 skip if visited before
if (_determined_vertex_set.Contains(cur_adjacent_vertex))
{
continue;
}
// 2.2 calculate the new distance
double distance = _start_vertex_distance_index.ContainsKey(vertex) ? _start_vertex_distance_index[vertex] : Graph.DISCONNECTED;
distance += is_source2sink ? _graph.get_edge_weight(vertex, cur_adjacent_vertex) : _graph.get_edge_weight(cur_adjacent_vertex, vertex);
// 2.3 update the distance if necessary
if (!_start_vertex_distance_index.ContainsKey(cur_adjacent_vertex) || _start_vertex_distance_index[cur_adjacent_vertex] > distance)
{
_start_vertex_distance_index[cur_adjacent_vertex] = distance;
_predecessor_index[cur_adjacent_vertex] = vertex;
cur_adjacent_vertex.set_weight(distance);
_vertex_candidate_queue.EnqueueWithoutDuplicates(cur_adjacent_vertex, (float)distance);// Lớp PriorytyQueue quan trong can thuc hien đổi lại
}
}
}
/// <summary>
/// Note that currently there seem to be no way for the "yanqi" implementation to actually specify the number
/// of shortest paths to return, but it seems to find all paths.
/// However, the implementation of this method instead takes care of reducing the result.
/// Otherwise, if the semantic of the method is not respected it can not for example be tested
/// against results from other implementations since then they would return a different number of paths.
/// </summary>
/// <param name="startVertex"></param>
/// <param name="endVertex"></param>
/// <param name="maxNumberOfPaths"></param>
/// <returns></returns>
protected override IList <P> FindShortestPathHook(
V startVertex,
V endVertex,
int maxNumberOfPaths
)
{
IList <P> paths = new List <P>();
int startVertexId = idMapper.CreateOrRetrieveIntegerId(startVertex.VertexId);
int endVertexId = idMapper.CreateOrRetrieveIntegerId(endVertex.VertexId);
YenTopKShortestPathsAlg yenAlg = new YenTopKShortestPathsAlg(graphAdaptee, graphAdaptee.GetVertex(startVertexId), graphAdaptee.GetVertex(endVertexId));
while (yenAlg.HasNext())
{
global::edu.asu.emit.algorithm.graph.Path path = yenAlg.Next();
IList <E> edges = new List <E>();
java.util.List <BaseVertex> vertexList = path.GetVertexList();
for (int i = 1; i < vertexList.size(); i++)
{
BaseVertex startVertexForEdge = vertexList.get(i - 1);
BaseVertex endVertexForEdge = vertexList.get(i);
E edge = GetOriginalEdgeInstance(startVertexForEdge, endVertexForEdge);
edges.Add(
edge
);
}
W totalWeight = base.CreateInstanceWithTotalWeight(path.GetWeight(), edges);
paths.Add(base.CreatePath(totalWeight, edges));
if (maxNumberOfPaths == paths.Count)
{
break;
}
}
return(new ReadOnlyCollection <P>(paths));
}
/**
* Correct costs of successors of the input vertex using backward star form.
* (FLOWER)
*
* @param vertex
*/
public void CorrectCostBackward(BaseVertex vertex)
{
// 1. initialize the list of vertex to be updated
var vertexList = new java.util.LinkedList <BaseVertex>();
vertexList.add(vertex);
// 2. update the cost of relevant precedents of the input vertex
while (!vertexList.isEmpty())
{
BaseVertex curVertex = vertexList.remove(0);
double costOfCurVertex = startVertexDistanceIndex[curVertex];
ISet <BaseVertex> preVertexSet = graph.GetPrecedentVertices(curVertex);
foreach (BaseVertex preVertex in preVertexSet)
{
double costOfPreVertex = startVertexDistanceIndex.ContainsKey(preVertex) ?
startVertexDistanceIndex[preVertex] : Graph.DISCONNECTED;
double freshCost = costOfCurVertex + graph.GetEdgeWeight(preVertex, curVertex);
if (costOfPreVertex > freshCost)
{
startVertexDistanceIndex.AddOrReplace(preVertex, freshCost);
predecessorIndex.AddOrReplace(preVertex, curVertex);
vertexList.add(preVertex);
}
}
}
}
/// <summary>
/// Do the work
/// </summary>
protected internal virtual void determine_shortest_paths(BaseVertex source_vertex, BaseVertex sink_vertex, bool is_source2sink)
{
// 0. clean up variables
clear();
// 1. initialize members
BaseVertex end_vertex = is_source2sink ? sink_vertex : source_vertex;
BaseVertex start_vertex = is_source2sink ? source_vertex : sink_vertex;
_start_vertex_distance_index[start_vertex] = 0d;
start_vertex.set_weight(0d);
_vertex_candidate_queue.Enqueue(start_vertex, 0);
// 2. start searching for the shortest path
while (_vertex_candidate_queue.Count() != 0)
{
BaseVertex cur_candidate = _vertex_candidate_queue.Dequeue();
if (cur_candidate.Equals(end_vertex))
{
break;
}
_determined_vertex_set.Add(cur_candidate);
_improve_to_vertex(cur_candidate, is_source2sink);
}
}
public virtual double GetEdgeWeight(BaseVertex source, BaseVertex sink)
{
return(vertexPairWeightIndex.ContainsKey(
new Pair <int, int>(source.GetId(), sink.GetId()))?
vertexPairWeightIndex[
new Pair <int, int>(source.GetId(), sink.GetId())]
: DISCONNECTED);
}
public static Vector3[] CalculateBaseVertices(Vector3 center, int height)
{
Vector3[] vertices = (Vector3[])BaseVertex.Clone();
for (int d = 0; d < 6; d++)
{
vertices[d] = center + vertices[d];
vertices[d].y = height;
}
return(vertices);
}
public void AddVertex(BaseVertex vertex)
{
if (_vertices == null)
{
_vertices = new List <BaseVertex>();
}
_vertices.Add(vertex);
MakeEdges();
}
/**
* Calculate the distance from the target vertex to the input
* vertex using forward star form.
* (FLOWER)
*
* @param vertex
*/
public Path UpdateCostForward(BaseVertex vertex)
{
double cost = Graph.DISCONNECTED;
// 1. get the set of successors of the input vertex
ISet <BaseVertex> adjVertexSet = graph.GetAdjacentVertices(vertex);
// 2. make sure the input vertex exists in the index
if (!startVertexDistanceIndex.ContainsKey(vertex))
{
startVertexDistanceIndex.Add(vertex, Graph.DISCONNECTED);
}
// 3. update the distance from the root to the input vertex if necessary
foreach (BaseVertex curVertex in adjVertexSet)
{
// 3.1 get the distance from the root to one successor of the input vertex
double distance = startVertexDistanceIndex.ContainsKey(curVertex)?
startVertexDistanceIndex[curVertex] : Graph.DISCONNECTED;
// 3.2 calculate the distance from the root to the input vertex
distance += graph.GetEdgeWeight(vertex, curVertex);
//distance += ((VariableGraph)graph).get_edge_weight_of_graph(vertex, curVertex);
// 3.3 update the distance if necessary
double costOfVertex = startVertexDistanceIndex[vertex];
if (costOfVertex > distance)
{
startVertexDistanceIndex.AddOrReplace(vertex, distance);
predecessorIndex.AddOrReplace(vertex, curVertex);
cost = distance;
}
}
// 4. create the subPath if exists
Path subPath = null;
if (cost < Graph.DISCONNECTED)
{
subPath = new Path();
subPath.SetWeight(cost);
java.util.LinkedList <BaseVertex> vertexList = subPath.GetVertexList();
vertexList.add(vertex);
BaseVertex selVertex = predecessorIndex[vertex];
while (selVertex != null)
{
vertexList.add(selVertex);
selVertex = predecessorIndex.GetValueIfExists(selVertex);
}
}
return(subPath);
}
/// <summary>
/// Return the weight associated with the input edge.
/// </summary>
/// <param name="source"> </param>
/// <param name="sink">
/// @return </param>
public override double get_edge_weight(BaseVertex source, BaseVertex sink)
{
int source_id = source.get_id();
int sink_id = sink.get_id();
if (_rem_vertex_id_set.Contains(source_id) || _rem_vertex_id_set.Contains(sink_id) || _rem_edge_set.Contains(new Pair <int, int>(source_id, sink_id)))
{
return(Graph.DISCONNECTED);
}
return(base.get_edge_weight(source, sink));
}
/**
* Constructor 2
*
* @param graph
* @param sourceVertex
* @param targetVertex
*/
public YenTopKShortestPathsAlg(BaseGraph graph,
BaseVertex sourceVertex, BaseVertex targetVertex)
{
if (graph == null)
{
throw new System.ArgumentException("A NULL graph object occurs!");
}
this.graph = new VariableGraph((Graph)graph);
this.sourceVertex = sourceVertex;
this.targetVertex = targetVertex;
Init();
}
/**
* Return the weight associated with the input edge.
*
* @param source
* @param sink
* @return
*/
public override double GetEdgeWeight(BaseVertex source, BaseVertex sink)
{
int sourceId = source.GetId();
int sinkId = sink.GetId();
if (remVertexIdSet.Contains(sourceId) || remVertexIdSet.Contains(sinkId) ||
remEdgeSet.Contains(new Pair <int, int>(sourceId, sinkId)))
{
return(Graph.DISCONNECTED);
}
return(base.GetEdgeWeight(source, sink));
}
/// <summary>
/// Constructor 2
/// </summary>
/// <param name="graph"> </param>
/// <param name="source_vt"> </param>
/// <param name="target_vt"> </param>
public YenTopKShortestPathsAlg(BaseGraph graph, BaseVertex source_vt, BaseVertex target_vt)
{
if (graph == null)
{
throw new System.ArgumentException("A NULL graph object occurs!");
}
//
_graph = new VariableGraph((Graph)graph);
_source_vertex = source_vt;
_target_vertex = target_vt;
//
_init();
}
public virtual void correct_cost_backward(BaseVertex vertex)
{
// 1. initialize the list of vertex to be updated
List <BaseVertex> vertex_list = new List <BaseVertex>();
vertex_list.Add(vertex);
// 2. update the cost of relevant precedents of the input vertex
if (vertex_list.Count != 0)
{
//vertex_list.RemoveFirst();
//if (vertex_list.Count > 1)
// vertex_list.RemoveAt(0);
BaseVertex cur_vertex = vertex_list[0];
double cost_of_cur_vertex = _start_vertex_distance_index[cur_vertex];
HashSet <BaseVertex> pre_vertex_set = _graph.get_precedent_vertices(cur_vertex);
foreach (BaseVertex pre_vertex in pre_vertex_set)
{
double cost_of_pre_vertex = _start_vertex_distance_index.ContainsKey(pre_vertex) ? _start_vertex_distance_index[pre_vertex] : Graph.DISCONNECTED;
double fresh_cost = cost_of_cur_vertex + _graph.get_edge_weight(pre_vertex, cur_vertex);
//double fresh_cost = cost_of_cur_vertex + ((VariableGraph)_graph).get_edge_weight_of_graph(pre_vertex, cur_vertex);
if (cost_of_pre_vertex > fresh_cost)
{
// _start_vertex_distance_index[pre_vertex] = fresh_cost;
if (_start_vertex_distance_index.ContainsKey(pre_vertex))
{
_start_vertex_distance_index[pre_vertex] = fresh_cost;
}
else
{
_start_vertex_distance_index.Add(pre_vertex, fresh_cost);
}
//_start_vertex_distance_index[pre_vertex] = fresh_cost;
if (_predecessor_index.ContainsKey(pre_vertex))
{
_start_vertex_distance_index[pre_vertex] = fresh_cost;
}
else
{
_predecessor_index.Add(pre_vertex, cur_vertex);
}
vertex_list.Add(pre_vertex);
}
}
}
}
// Set the leftmost edge as the first edge by definition.
public Edge(BaseVertex firstVertex, BaseVertex secondVertex)
{
if (firstVertex.transform.position.x <= secondVertex.transform.position.x)
{
FirstVertex = firstVertex;
SecondVertex = secondVertex;
}
else
{
FirstVertex = secondVertex;
SecondVertex = firstVertex;
}
_distance = (SecondVertex.transform.position - FirstVertex.transform.position).magnitude;
}
/// <summary>
/// Get the top-K shortest paths connecting the source and the target.
/// This is a batch execution of top-K results.
/// </summary>
/// <param name="source"> </param>
/// <param name="sink"> </param>
/// <param name="top_k">
/// @return </param>
public List <Path> get_shortest_paths(BaseVertex source_vertex, BaseVertex target_vertex, int top_k)
{
_source_vertex = source_vertex;
_target_vertex = target_vertex;
_init();
int count = 0;
while (has_next() && count < top_k)
{
next();
++count;
}
return(_result_list);
}
public bool EdgeExists(BaseVertex currentVertex, BaseVertex siblingVertex)
{
for (int i = 0; i < _edges.Count; i++)
{
bool isEdge = (_edges[i].FirstVertex.Equals(currentVertex) &&
_edges[i].SecondVertex.Equals(siblingVertex)) ||
(_edges[i].FirstVertex.Equals(siblingVertex) &&
_edges[i].SecondVertex.Equals(currentVertex));
if (isEdge)
{
return(true);
}
}
return(false);
}
// see comment at the top of the file regarding why the below Comparable<Vertex> methods has been removed
// Some methods related to conversion from
// Java code to .NET code
// (Java Comparable and .NET IComparable)
//public int CompareTo(Vertex other)
//{
// return compareToo(other);
//}
//public int compareTo(BaseVertex other)
//{
// return compareToo(other);
//}
//public int CompareTo(BaseVertex other)
//{
// return compareToo(other);
//}
//public int compareTo(Vertex rVertex) {
// return compareToo(rVertex);
//}
public override bool Equals(object obj)
{
if (this == obj)
{
return(true);
}
if (obj == null)
{
return(false);
}
if ((obj is Vertex) || (obj is BaseVertex))
{
BaseVertex other = (BaseVertex)obj;
return(this.GetId() == other.GetId());
}
return(false);
}
/**
* Get the top-K shortest paths connecting the source and the target.
* This is a batch execution of top-K results.
*
* @param source
* @param sink
* @param k
* @return
*/
public IList <Path> GetShortestPaths(BaseVertex source,
BaseVertex target, int k)
{
sourceVertex = source;
targetVertex = target;
Init();
int count = 0;
while (HasNext() && count < k)
{
Next();
++count;
}
return(resultList);
}
// We use methods to manipulate the list of siblings instead of a property to ensure that the list
// cannot be accessed directly.
public bool AddSibling(BaseVertex newSibling)
{
if (_siblings == null)
{
_siblings = new List <BaseVertex>();
}
// Add sibling only if it doesn't already exist in the list of siblings.
BaseVertex match = _siblings.Find(s => s.Equals(newSibling));
if (match == null)
{
_siblings.Add(newSibling);
return(true);
}
return(false);
}
public bool RemoveSibling(BaseVertex sibling)
{
if (_siblings == null)
{
return(false);
}
// Remove sibling only if it exists in the list of siblings.
BaseVertex match = _siblings.Find(s => s.Equals(sibling));
if (match != null)
{
_siblings.Remove(sibling);
return(true);
}
return(false);
}
/**
* Note that, the source should not be as same as the sink! (we could extend
* this later on)
*
* @param sourceVertex
* @param sinkVertex
* @return
*/
public Path GetShortestPath(BaseVertex sourceVertex, BaseVertex sinkVertex)
{
DetermineShortestPaths(sourceVertex, sinkVertex, true);
//
java.util.LinkedList <BaseVertex> vertexList = new java.util.LinkedList <BaseVertex>();
double weight = startVertexDistanceIndex.ContainsKey(sinkVertex) ?
startVertexDistanceIndex[sinkVertex] : Graph.DISCONNECTED;
if (weight != Graph.DISCONNECTED)
{
BaseVertex curVertex = sinkVertex;
do
{
vertexList.add(curVertex);
curVertex = predecessorIndex[curVertex];
} while (curVertex != null && curVertex != sourceVertex);
vertexList.add(sourceVertex);
vertexList.reverse();
}
return(new Path(vertexList, weight));
}
/**
* Get the set of vertices preceding the input vertex.
*
* @param vertex
* @return
*/
public override ISet <BaseVertex> GetPrecedentVertices(BaseVertex vertex)
{
ISet <BaseVertex> retSet = new HashSet <BaseVertex>();
if (!remVertexIdSet.Contains(vertex.GetId()))
{
int endingVertexId = vertex.GetId();
ISet <BaseVertex> preVertexSet = base.GetPrecedentVertices(vertex);
foreach (BaseVertex curVertex in preVertexSet)
{
int startingVertexId = curVertex.GetId();
if (remVertexIdSet.Contains(startingVertexId) ||
remEdgeSet.Contains(new Pair <int, int>(startingVertexId, endingVertexId)))
{
continue;
}
//
retSet.Add(curVertex);
}
}
return(retSet);
}
/// <summary>
/// Get the set of vertices preceding the input vertex.
/// </summary>
/// <param name="vertex">
/// @return </param>
public override HashSet <BaseVertex> get_precedent_vertices(BaseVertex vertex)
{
HashSet <BaseVertex> ret_set = new HashSet <BaseVertex>();
if (!_rem_vertex_id_set.Contains(vertex.get_id()))
{
int ending_vertex_id = vertex.get_id();
HashSet <BaseVertex> pre_vertex_set = base.get_precedent_vertices(vertex);
foreach (BaseVertex cur_vertex in pre_vertex_set)
{
int starting_vertex_id = cur_vertex.get_id();
if (_rem_vertex_id_set.Contains(starting_vertex_id) || _rem_edge_set.Contains(new Pair <int, int>(starting_vertex_id, ending_vertex_id)))
{
continue;
}
//
ret_set.Add(cur_vertex);
}
}
return(ret_set);
}
/// <summary>
/// Note that, the source should not be as same as the sink! (we could extend
/// this later on)
/// </summary>
/// <param name="source_vertex"> </param>
/// <param name="sink_vertex">
/// @return </param>
public virtual Path get_shortest_path(BaseVertex source_vertex, BaseVertex sink_vertex)
{
determine_shortest_paths(source_vertex, sink_vertex, true);
//
List <BaseVertex> vertex_list = new List <BaseVertex>();
double weight = _start_vertex_distance_index.ContainsKey(sink_vertex) ? _start_vertex_distance_index[sink_vertex] : Graph.DISCONNECTED;
if (weight != Graph.DISCONNECTED)
{
BaseVertex cur_vertex = sink_vertex;
do
{
vertex_list.Add(cur_vertex);
cur_vertex = _predecessor_index[cur_vertex];
} while (cur_vertex != null && cur_vertex != source_vertex);
//
vertex_list.Add(source_vertex);
vertex_list.Reverse();
}
//
return(new Path(vertex_list, weight));
}
// Use this for initialization
protected override void Start()
{
NoiseGenerator perlinNoiseGenerator = new NoiseGenerator();
_terrainVertices = new List <BaseVertex>();
// generate the specified number of vertices for the hill on the terrain, and position them
// evenly
float pointDistance = _endVertex.transform.position.x - _startVertex.transform.position.x;
float xOffset = Mathf.Abs(pointDistance) / (_numDivisionsX + 2.0f);
float yRange = _maxHeight - _minHeight;
for (int i = 0; i <= _numDivisionsX; i++)
{
BaseVertex terrainVertex = Instantiate(_baseVertexPrefab, transform).AddComponent <BaseVertex>();
float xPosition = _startVertex.transform.position.x + (i + 1) * xOffset;
float yPosition = perlinNoiseGenerator.GetNoise(i, _numDivisionsX, _minHeight, _maxHeight);
float radialMask = 1.0f;
// the further we are from the center of the hill, the more we attenuate the noise.
// This gives a nice mountain-like profile to it.
if (i > _numDivisionsX / 2.0f)
{
radialMask = (_numDivisionsX - i) / (_numDivisionsX / 2.0f);
}
else
{
radialMask = i / (_numDivisionsX / 2.0f);
}
// apply new y position (noise)
yPosition += yRange / 2.0f;
yPosition = transform.position.y + radialMask * yPosition;
// cap the y position if needed, to ensure the level is physically clearable.
float maxWorldHeight = transform.position.y + _maxHeight;
float minWorldHeight = transform.position.y;
if (yPosition > maxWorldHeight)
{
yPosition = maxWorldHeight;
}
else if (yPosition < minWorldHeight)
{
yPosition = minWorldHeight;
}
terrainVertex.transform.position = new Vector3(xPosition, yPosition, 0);
_terrainVertices.Add(terrainVertex);
}
// make edges out of vertices of the terrain. They will be used for collisions
for (int i = 1; i < _terrainVertices.Count - 1; i++)
{
_terrainVertices[i].AddSibling(_terrainVertices[i - 1]);
_terrainVertices[i].AddSibling(_terrainVertices[i + 1]);
}
int verticesCount = _terrainVertices.Count;
if (verticesCount > 1)
{
_terrainVertices[0].AddSibling(_startVertex);
_terrainVertices[verticesCount - 1].AddSibling(_endVertex);
_startVertex.AddSibling(_terrainVertices[0]);
_endVertex.AddSibling(_terrainVertices[verticesCount - 1]);
}
AddVertex(_terrainVertices);
base.Start();
}
/**
* Get the shortest path among all that connecting source with targe.
*
* @return
*/
public Path Next()
{
//3.1 prepare for removing vertices and arcs
Path curPath = pathCandidates.Poll();
resultList.Add(curPath);
BaseVertex curDerivation = pathDerivationVertexIndex[curPath];
int curPathHash =
curPath.GetVertexList().subList(0, curPath.GetVertexList().indexOf(curDerivation)).GetHashCode();
int count = resultList.Count;
//3.2 remove the vertices and arcs in the graph
for (int i = 0; i < count - 1; ++i)
{
Path curResultPath = resultList[i];
int curDevVertexId =
curResultPath.GetVertexList().indexOf(curDerivation);
if (curDevVertexId < 0)
{
continue;
}
// Note that the following condition makes sure all candidates should be considered.
/// The algorithm in the paper is not correct for removing some candidates by mistake.
int pathHash = curResultPath.GetVertexList().subList(0, curDevVertexId).GetHashCode();
if (pathHash != curPathHash)
{
continue;
}
BaseVertex curSuccVertex =
curResultPath.GetVertexList().get(curDevVertexId + 1);
graph.DeleteEdge(new Pair <int, int>(
curDerivation.GetId(), curSuccVertex.GetId()));
}
int pathLength = curPath.GetVertexList().size();
java.util.LinkedList <BaseVertex> curPathVertexList = curPath.GetVertexList();
for (int i = 0; i < pathLength - 1; ++i)
{
graph.DeleteVertex(curPathVertexList.get(i).GetId());
graph.DeleteEdge(new Pair <int, int>(
curPathVertexList.get(i).GetId(),
curPathVertexList.get(i + 1).GetId()));
}
//3.3 calculate the shortest tree rooted at target vertex in the graph
DijkstraShortestPathAlg reverseTree = new DijkstraShortestPathAlg(graph);
reverseTree.GetShortestPathFlower(targetVertex);
//3.4 recover the deleted vertices and update the cost and identify the new candidate results
bool isDone = false;
for (int i = pathLength - 2; i >= 0 && !isDone; --i)
{
//3.4.1 get the vertex to be recovered
BaseVertex curRecoverVertex = curPathVertexList.get(i);
graph.RecoverDeletedVertex(curRecoverVertex.GetId());
//3.4.2 check if we should stop continuing in the next iteration
if (curRecoverVertex.GetId() == curDerivation.GetId())
{
isDone = true;
}
//3.4.3 calculate cost using forward star form
Path subPath = reverseTree.UpdateCostForward(curRecoverVertex);
//3.4.4 get one candidate result if possible
if (subPath != null)
{
++generatedPathNum;
//3.4.4.1 get the prefix from the concerned path
double cost = 0;
IList <BaseVertex> prePathList = new List <BaseVertex>();
reverseTree.CorrectCostBackward(curRecoverVertex);
for (int j = 0; j < pathLength; ++j)
{
BaseVertex curVertex = curPathVertexList.get(j);
if (curVertex.GetId() == curRecoverVertex.GetId())
{
j = pathLength;
}
else
{
cost += graph.GetEdgeWeightOfGraph(curPathVertexList.get(j),
curPathVertexList.get(j + 1));
prePathList.Add(curVertex);
}
}
prePathList.AddAll(subPath.GetVertexList());
//3.4.4.2 compose a candidate
subPath.SetWeight(cost + subPath.GetWeight());
subPath.GetVertexList().clear();
subPath.GetVertexList().addAll(prePathList);
//3.4.4.3 put it in the candidate pool if new
if (!pathDerivationVertexIndex.ContainsKey(subPath))
{
pathCandidates.Add(subPath);
pathDerivationVertexIndex.Add(subPath, curRecoverVertex);
}
}
//3.4.5 restore the edge
BaseVertex succVertex = curPathVertexList.get(i + 1);
graph.RecoverDeletedEdge(new Pair <int, int>(
curRecoverVertex.GetId(), succVertex.GetId()));
//3.4.6 update cost if necessary
double cost1 = graph.GetEdgeWeight(curRecoverVertex, succVertex)
+ reverseTree.GetStartVertexDistanceIndex()[succVertex];
if (reverseTree.GetStartVertexDistanceIndex()[curRecoverVertex] > cost1)
{
reverseTree.GetStartVertexDistanceIndex().AddOrReplace(curRecoverVertex, cost1);
reverseTree.GetPredecessorIndex().AddOrReplace(curRecoverVertex, succVertex);
reverseTree.CorrectCostBackward(curRecoverVertex);
}
}
//3.5 restore everything
graph.RecoverDeletedEdges();
graph.RecoverDeletedVertices();
return(curPath);
}