C# AstarPath類代碼示例

 public PathThreadInfo(int index, AstarPath astar, PathHandler runData)
 {
     this.threadIndex = index;
     this.astar = astar;
     this.runData = runData;
     this.lockObject = new object();
 }

 public PathThreadInfo(int index, AstarPath astar, NodeRunData runData)
 {
     this.threadIndex = index;
     this.astar = astar;
     this.runData = runData;
     _lock = new object();
 }

	//This function will be called when the pathfinding is complete, it will be called when the pathfinding returned an error too.
	public void OnComplete (AstarPath.Path p) {
		
		//If the script was already calculating a path when a new path started calculating, then it would have canceled the first path, that will generate an OnComplete message from the first path, this makes sure we only get OnComplete messages from the path we started calculating latest.
		if (path != p) {
			return;
		}
		
		//What should we do if the path returned an error (there is no available path to the target).
		if (path.error) {
			switch (onError) {
				case OnError.None:
					return;
				case OnError.ErrorMessage:
					SendMessage("PathError",new Vector3[0],SendMessageOptions.DontRequireReceiver);
					break;
				case OnError.EmptyArray:
					SendMessage("PathComplete",new Vector3[0],SendMessageOptions.DontRequireReceiver);
					break;
			} 
			return;
		}
		
		if (path.path == null) {
			Debug.LogError ("The 'Path' array is not assigned - System Error - Please send a bug report - Include the following info:\nError = "+p.error+"\nStart = "+startpos+"\nEnd = "+endpos+"\nFound End = "+p.foundEnd+"\nError = "+p.error);
		}
		
		if(path.path.Length > 1) {
			//Convert the Node array to a Vector3 array, subract one from the array if Remove First is true and add one to the array if Use Real End is set to Add
			Vector3[] a = new Vector3[path.path.Length - (removeFirst ? 1 : 0) + (endPoint == RealEnd.AddExact ? 1 : 0)];
			
			for (int i=0;i<path.path.Length;i++) {
				//Ignore the first node if Remove First is set to True
				if (removeFirst && i==0) {
					continue;
				}
				
				a[i - (removeFirst ? 1 : 0)] = path.path[i].vectorPos;
			}
			
			if (startPoint == RealStart.Exact) {
				a[0] = startpos;
			}
			
			//Assign the endpoint
			if (endPoint == RealEnd.AddExact || endPoint == RealEnd.Exact) {
				a[a.Length-1] = endpos;
			}
			
			//Store the path in a variable so it can be drawn in the scene view for debugging
			pathPoints = a;
			
			//Send the Vector3 array to a movement script attached to this gameObject
			SendMessage("PathComplete",a,SendMessageOptions.DontRequireReceiver);
		} else {
			Vector3[] a2 = new Vector3[1] {(endPoint == RealEnd.AddExact || endPoint == RealEnd.Exact ? endpos : startpos)};
			pathPoints = a2;
			SendMessage("PathComplete",a2,SendMessageOptions.DontRequireReceiver);
		}
		
	}

    void CreateGraph(AstarPath astar)
    {
        if (!points)
        {
            Debug.LogWarning("missing points root for autopointgraph " + name);
        }

        var graphs = new List<NavGraph>(astar.graphs);
        if (graphs.Contains(graph))
        {
            return;
        }

        graph = new PointGraph();
        graph.active = astar;
        graph.name = "AutoPointGraph (" + name + ")";
        graph.root = points;
        graph.raycast = true;
        graph.maxDistance = 0;
        graph.recursive = true;
        graph.mask = -1;
        
        graphs.Add(graph);
        astar.graphs = graphs.ToArray();
    }

		/** Constructor for a graph node. */
		protected GraphNode (AstarPath astar) {
			if (!System.Object.ReferenceEquals(astar, null)) {
				this.nodeIndex = astar.GetNewNodeIndex();
				astar.InitializeNode(this);
			} else {
				throw new System.Exception("No active AstarPath object to bind to");
			}
		}

    protected override void Start()
    {
        base.Start();

        if(Pathfinding == null) {
            Pathfinding = (AstarPath)GameObject.FindObjectOfType(typeof(AstarPath));
        }
    }

 private void InitializeAstarPath() {
     _astarPath = AstarPath.active;
     _astarPath.scanOnStartup = false;
     // IMPROVE max distance from a worldspace position to a node from my experimentation
     // assuming points surrounding obstacles are set at 0.05 grids away (0.5 * 0.1) from obstacle center
     // and interior sector points are 0.25 grids away from sector center (0.5 * 0.5)
     _astarPath.maxNearestNodeDistance = 600F;
     // TODO other settings
 }

		// End of fallback
		
		/** Constructor for a graph node. */
		public GraphNode (AstarPath astar) {
			//this.nodeIndex = NextNodeIndex++;
			if (astar != null) {
				this.nodeIndex = astar.GetNewNodeIndex();
				astar.InitializeNode (this);
			} else {
				throw new System.Exception ("No active AstarPath object to bind to");
			}
		}

 private void OnGraphScansCompleted(AstarPath astarPath) {
     //if (GameManager.Instance.GameState == GameState.GeneratingPathGraphs) {
     //GameManager.Instance.__ProgressToRunning();
     // TODO need to tell GameManager that it is OK to progress the game state
     // WARNING: I must not directly cause the game state to change as the other subscribers to 
     // GameStateChanged may not have been called yet. This GraphScansCompletedEvent occurs 
     // while we are still processing OnGameStateChanged
     //}
 }

 /// <summary>
 /// Editor only!!!
 /// </summary>
 public static void CreateGraphIfItNull(AstarPath path)
 {
     if (path == null)
     {
         Debug.LogWarning("AstarPath not found");
         return;
     }
     if (path.astarData == null || path.astarData.gridGraph == null)
         AstarPath.MenuScan();
 }

    int zFront = 0; //forward

    #endregion Fields

    #region Methods

    // Use this for initialization
    void Start()
    {
        dropDownMenuObject = GameObject.Find("Panel").GetComponent<DropDownMenu>();
        missionReader = GameObject.FindGameObjectWithTag("Grid").GetComponent<MissionReader>();
        astarPath = GameObject.FindGameObjectWithTag("Grid").GetComponent<AstarPath>();
        xLeft = -27;
        xRight = 27;
        zFront = -110;
        zBack = -140;
    }

        public void DoStuff()
        {
            if (!astarPath.IsNone && astarPath.Value != null)
            { astarp = FsmConverter.GetAstarPath(astarPath); }
            else
            { astarp = AstarPath.active; }

            if(!isScanning.IsNone)
            { isScanning.Value = astarp.isScanning;	}

            if(!showGraphs.IsNone)
            { showGraphs.Value = astarp.showGraphs;	}

            if(!IsUsingMultithreading.IsNone)
            { IsUsingMultithreading.Value = AstarPath.IsUsingMultithreading; }

            if(!IsAnyGraphUpdatesQueued.IsNone)
            { IsAnyGraphUpdatesQueued.Value = astarp.IsAnyGraphUpdatesQueued; }

            if(!lastUniqueAreaIndex.IsNone)
            { lastUniqueAreaIndex.Value = astarp.lastUniqueAreaIndex; }

            if(!ActiveThreadsCount.IsNone)
            { ActiveThreadsCount.Value = AstarPath.ActiveThreadsCount; }

            if(!NumParallelThreads.IsNone)
            { NumParallelThreads.Value = AstarPath.NumParallelThreads;	}

            if(!Version.IsNone)
            { Version.Value = AstarPath.Version.ToString(); }

            if(!graphs.IsNone)
            { graphs.Value = FsmConverter.SetNavGraphs(astarp.graphs); }

            if(!activeAstarPath.IsNone)
            { activeAstarPath.Value = FsmConverter.SetAstarPath(AstarPath.active);	}

            if (!astarData.IsNone)
            { astarData.Value = FsmConverter.SetNavGraphs(astarp.graphs); }
            return;
        }

        public void DoStuff()
        {
            if (!astarPath.IsNone && astarPath.Value != null)
            { astarp = FsmConverter.GetAstarPath(astarPath); }
            else
            { astarp = AstarPath.active; }

            if(!isScanning.IsNone)
            { astarp.isScanning = isScanning.Value;	}

            if(!showGraphs.IsNone)
            { astarp.showGraphs = showGraphs.Value; }

            if(!lastUniqueAreaIndex.IsNone)
            { astarp.lastUniqueAreaIndex = lastUniqueAreaIndex.Value; }

            if (!astarData.IsNone)
            { astarp.graphs = FsmConverter.GetNavGraphs(astarData.Value); }

            return;
        }

		public PathProcessor (AstarPath astar, PathReturnQueue returnQueue, int processors, bool multithreaded) {
			this.astar = astar;
			this.returnQueue = returnQueue;

			if (processors < 0) {
				throw new System.ArgumentOutOfRangeException("processors");
			}

			if (!multithreaded && processors != 1) {
				throw new System.Exception("Only a single non-multithreaded processor is allowed");
			}

			// Set up path queue with the specified number of receivers
			queue = new ThreadControlQueue(processors);
			threadInfos = new PathThreadInfo[processors];

			for (int i = 0; i < processors; i++) {
				threadInfos[i] = new PathThreadInfo(i, astar, new PathHandler(i, processors));
			}

			if (multithreaded) {
				threads = new Thread[processors];

				// Start lots of threads
				for (int i = 0; i < processors; i++) {
					var threadIndex = i;
					var thread = new Thread (() => CalculatePathsThreaded(threadInfos[threadIndex]));
					thread.Name = "Pathfinding Thread " + i;
					thread.IsBackground = true;
					threads[i] = thread;
					thread.Start();
				}
			} else {
				// Start coroutine if not using multithreading
				threadCoroutine = CalculatePaths(threadInfos[0]);
			}
		}

        /** Called to serialize a graphs settings. \note Before calling this, setting #sPrefix to something unique for the graph is a good idea to avoid collisions in variable names */
        public void SerializeSettings(NavGraph graph, AstarPath active)
        {
            ISerializableGraph serializeGraph = graph as ISerializableGraph;

            if (serializeGraph == null) {
                Debug.LogError ("The graph specified is not serializable, the graph is of type "+graph.GetType());
                return;
            }

            serializeGraph.SerializeSettings (this);
        }