/** Stop calculating the current path request.
* If this Seeker is currently calculating a path it will be canceled.
* The callback (usually to a method named OnPathComplete) will soon be called
* with a path that has the 'error' field set to true.
*
* This does not stop the character from moving, it just aborts
* the path calculation.
*
* \param pool If true then the path will be pooled when the pathfinding system is done with it.
*/
public void CancelCurrentPathRequest(bool pool = true)
{
if (!IsDone())
{
path.FailWithError("Canceled by script (Seeker.CancelCurrentPathRequest)");
if (pool)
{
// Make sure the path has had its reference count incremented and decremented once.
// If this is not done the system will think no pooling is used at all and will not pool the path.
// The particular object that is used as the parameter (in this case 'path') doesn't matter at all
// it just has to be *some* object.
path.Claim(path);
path.Release(path);
}
}
}
/// <summary>
/// Main pathfinding method.
/// This method will calculate the paths in the pathfinding queue.
///
/// See: CalculatePathsThreaded
/// See: StartPath
/// </summary>
IEnumerator CalculatePaths(PathHandler pathHandler)
{
// Max number of ticks before yielding/sleeping
long maxTicks = (long)(astar.maxFrameTime * 10000);
long targetTick = System.DateTime.UtcNow.Ticks + maxTicks;
while (true)
{
// The path we are currently calculating
Path p = null;
AstarProfiler.StartProfile("Path Queue");
// Try to get the next path to be calculated
bool blockedBefore = false;
while (p == null)
{
try {
p = queue.PopNoBlock(blockedBefore);
blockedBefore |= p == null;
} catch (ThreadControlQueue.QueueTerminationException) {
yield break;
}
if (p == null)
{
AstarProfiler.EndProfile();
yield return(null);
AstarProfiler.StartProfile("Path Queue");
}
}
AstarProfiler.EndProfile();
AstarProfiler.StartProfile("Path Calc");
IPathInternals ip = (IPathInternals)p;
// Max number of ticks we are allowed to continue working in one run
// One tick is 1/10000 of a millisecond
maxTicks = (long)(astar.maxFrameTime * 10000);
ip.PrepareBase(pathHandler);
// Now processing the path
// Will advance to Processing
ip.AdvanceState(PathState.Processing);
// Call some callbacks
// It needs to be stored in a local variable to avoid race conditions
var tmpOnPathPreSearch = OnPathPreSearch;
if (tmpOnPathPreSearch != null)
{
tmpOnPathPreSearch(p);
}
// Tick for when the path started, used for calculating how long time the calculation took
long startTicks = System.DateTime.UtcNow.Ticks;
long totalTicks = 0;
AstarProfiler.StartFastProfile(8);
AstarProfiler.StartFastProfile(0);
//Prepare the path
AstarProfiler.StartProfile("Path Prepare");
ip.Prepare();
AstarProfiler.EndProfile("Path Prepare");
AstarProfiler.EndFastProfile(0);
// Check if the Prepare call caused the path to complete
// If this happens the path usually failed
if (p.CompleteState == PathCompleteState.NotCalculated)
{
// For debug uses, we set the last computed path to p, so we can view debug info on it in the editor (scene view).
astar.debugPathData = ip.PathHandler;
astar.debugPathID = p.pathID;
// Initialize the path, now ready to begin search
AstarProfiler.StartProfile("Path Initialize");
ip.Initialize();
AstarProfiler.EndProfile();
// The error can turn up in the Init function
while (p.CompleteState == PathCompleteState.NotCalculated)
{
// Do some work on the path calculation.
// The function will return when it has taken too much time
// or when it has finished calculation
AstarProfiler.StartFastProfile(2);
AstarProfiler.StartProfile("Path Calc Step");
ip.CalculateStep(targetTick);
AstarProfiler.EndFastProfile(2);
AstarProfiler.EndProfile();
// If the path has finished calculation, we can break here directly instead of sleeping
// Improves latency
if (p.CompleteState != PathCompleteState.NotCalculated)
{
break;
}
AstarProfiler.EndFastProfile(8);
totalTicks += System.DateTime.UtcNow.Ticks - startTicks;
// Yield/sleep so other threads can work
AstarProfiler.EndProfile();
yield return(null);
AstarProfiler.StartProfile("Path Calc");
startTicks = System.DateTime.UtcNow.Ticks;
AstarProfiler.StartFastProfile(8);
// Cancel function (and thus the thread) if no more paths should be accepted.
// This is done when the A* object is about to be destroyed
// The path is returned and then this function will be terminated (see similar IF statement higher up in the function)
if (queue.IsTerminating)
{
p.FailWithError("AstarPath object destroyed");
}
targetTick = System.DateTime.UtcNow.Ticks + maxTicks;
}
totalTicks += System.DateTime.UtcNow.Ticks - startTicks;
p.duration = totalTicks * 0.0001F;
#if ProfileAstar
System.Threading.Interlocked.Increment(ref AstarPath.PathsCompleted);
#endif
}
// Cleans up node tagging and other things
ip.Cleanup();
AstarProfiler.EndFastProfile(8);
// Call the immediate callback
// It needs to be stored in a local variable to avoid race conditions
var tmpImmediateCallback = p.immediateCallback;
if (tmpImmediateCallback != null)
{
tmpImmediateCallback(p);
}
AstarProfiler.StartFastProfile(13);
// It needs to be stored in a local variable to avoid race conditions
var tmpOnPathPostSearch = OnPathPostSearch;
if (tmpOnPathPostSearch != null)
{
tmpOnPathPostSearch(p);
}
AstarProfiler.EndFastProfile(13);
// Push the path onto the return stack
// It will be detected by the main Unity thread and returned as fast as possible (the next late update)
returnQueue.Enqueue(p);
ip.AdvanceState(PathState.ReturnQueue);
AstarProfiler.EndProfile();
// Wait a bit if we have calculated a lot of paths
if (System.DateTime.UtcNow.Ticks > targetTick)
{
yield return(null);
targetTick = System.DateTime.UtcNow.Ticks + maxTicks;
}
}
}
// Token: 0x06002378 RID: 9080 RVA: 0x001997BC File Offset: 0x001979BC
private IEnumerator CalculatePaths(PathHandler pathHandler)
{
long maxTicks = (long)(this.astar.maxFrameTime * 10000f);
long targetTick = DateTime.UtcNow.Ticks + maxTicks;
for (;;)
{
Path p = null;
bool blockedBefore = false;
while (p == null)
{
try
{
p = this.queue.PopNoBlock(blockedBefore);
blockedBefore |= (p == null);
}
catch (ThreadControlQueue.QueueTerminationException)
{
yield break;
}
if (p == null)
{
yield return(null);
}
}
IPathInternals ip = p;
maxTicks = (long)(this.astar.maxFrameTime * 10000f);
ip.PrepareBase(pathHandler);
ip.AdvanceState(PathState.Processing);
Action <Path> onPathPreSearch = this.OnPathPreSearch;
if (onPathPreSearch != null)
{
onPathPreSearch(p);
}
long ticks = DateTime.UtcNow.Ticks;
long totalTicks = 0L;
ip.Prepare();
if (!p.IsDone())
{
this.astar.debugPathData = ip.PathHandler;
this.astar.debugPathID = p.pathID;
ip.Initialize();
while (!p.IsDone())
{
ip.CalculateStep(targetTick);
if (p.IsDone())
{
break;
}
totalTicks += DateTime.UtcNow.Ticks - ticks;
yield return(null);
ticks = DateTime.UtcNow.Ticks;
if (this.queue.IsTerminating)
{
p.FailWithError("AstarPath object destroyed");
}
targetTick = DateTime.UtcNow.Ticks + maxTicks;
}
totalTicks += DateTime.UtcNow.Ticks - ticks;
p.duration = (float)totalTicks * 0.0001f;
}
ip.Cleanup();
OnPathDelegate immediateCallback = p.immediateCallback;
if (immediateCallback != null)
{
immediateCallback(p);
}
Action <Path> onPathPostSearch = this.OnPathPostSearch;
if (onPathPostSearch != null)
{
onPathPostSearch(p);
}
this.returnQueue.Enqueue(p);
ip.AdvanceState(PathState.ReturnQueue);
if (DateTime.UtcNow.Ticks > targetTick)
{
yield return(null);
targetTick = DateTime.UtcNow.Ticks + maxTicks;
}
p = null;
ip = null;
}
yield break;
}
/// <summary>
/// Main pathfinding method (multithreaded).
/// This method will calculate the paths in the pathfinding queue when multithreading is enabled.
///
/// See: CalculatePaths
/// See: StartPath
/// </summary>
void CalculatePathsThreaded(PathHandler pathHandler)
{
#if UNITY_2017_3_OR_NEWER
UnityEngine.Profiling.Profiler.BeginThreadProfiling("Pathfinding", "Pathfinding thread #" + (pathHandler.threadID + 1));
#endif
#if !ASTAR_FAST_BUT_NO_EXCEPTIONS
try {
#endif
// Max number of ticks we are allowed to continue working in one run.
// One tick is 1/10000 of a millisecond.
// We need to check once in a while if the thread should be stopped.
long maxTicks = (long)(10 * 10000);
long targetTick = System.DateTime.UtcNow.Ticks + maxTicks;
while (true)
{
// The path we are currently calculating
Path path = queue.Pop();
#if UNITY_2017_3_OR_NEWER
profilingSampler.Begin();
#endif
// Access the internal implementation methods
IPathInternals ipath = (IPathInternals)path;
AstarProfiler.StartFastProfile(0);
ipath.PrepareBase(pathHandler);
// Now processing the path
// Will advance to Processing
ipath.AdvanceState(PathState.Processing);
// Call some callbacks
if (OnPathPreSearch != null)
{
OnPathPreSearch(path);
}
// Tick for when the path started, used for calculating how long time the calculation took
long startTicks = System.DateTime.UtcNow.Ticks;
// Prepare the path
ipath.Prepare();
AstarProfiler.EndFastProfile(0);
if (path.CompleteState == PathCompleteState.NotCalculated)
{
// For visualization purposes, we set the last computed path to p, so we can view debug info on it in the editor (scene view).
astar.debugPathData = ipath.PathHandler;
astar.debugPathID = path.pathID;
AstarProfiler.StartFastProfile(1);
// Initialize the path, now ready to begin search
ipath.Initialize();
AstarProfiler.EndFastProfile(1);
// Loop while the path has not been fully calculated
while (path.CompleteState == PathCompleteState.NotCalculated)
{
// Do some work on the path calculation.
// The function will return when it has taken too much time
// or when it has finished calculation
AstarProfiler.StartFastProfile(2);
ipath.CalculateStep(targetTick);
AstarProfiler.EndFastProfile(2);
targetTick = System.DateTime.UtcNow.Ticks + maxTicks;
// Cancel function (and thus the thread) if no more paths should be accepted.
// This is done when the A* object is about to be destroyed
// The path is returned and then this function will be terminated
if (queue.IsTerminating)
{
path.FailWithError("AstarPath object destroyed");
}
}
path.duration = (System.DateTime.UtcNow.Ticks - startTicks) * 0.0001F;
#if ProfileAstar
System.Threading.Interlocked.Increment(ref AstarPath.PathsCompleted);
System.Threading.Interlocked.Add(ref AstarPath.TotalSearchTime, System.DateTime.UtcNow.Ticks - startTicks);
#endif
}
// Cleans up node tagging and other things
ipath.Cleanup();
AstarProfiler.StartFastProfile(9);
if (path.immediateCallback != null)
{
path.immediateCallback(path);
}
if (OnPathPostSearch != null)
{
OnPathPostSearch(path);
}
// Push the path onto the return stack
// It will be detected by the main Unity thread and returned as fast as possible (the next late update hopefully)
returnQueue.Enqueue(path);
// Will advance to ReturnQueue
ipath.AdvanceState(PathState.ReturnQueue);
AstarProfiler.EndFastProfile(9);
#if UNITY_2017_3_OR_NEWER
profilingSampler.End();
#endif
}
#if !ASTAR_FAST_BUT_NO_EXCEPTIONS
}
catch (System.Exception e) {
#if !NETFX_CORE
if (e is ThreadAbortException || e is ThreadControlQueue.QueueTerminationException)
#else
if (e is ThreadControlQueue.QueueTerminationException)
#endif
{
if (astar.logPathResults == PathLog.Heavy)
{
Debug.LogWarning("Shutting down pathfinding thread #" + pathHandler.threadID);
}
return;
}
Debug.LogException(e);
Debug.LogError("Unhandled exception during pathfinding. Terminating.");
// Unhandled exception, kill pathfinding
queue.TerminateReceivers();
} finally {
#if UNITY_2017_3_OR_NEWER
UnityEngine.Profiling.Profiler.EndThreadProfiling();
#endif
}
#endif
Debug.LogError("Error : This part should never be reached.");
queue.ReceiverTerminated();
}
// Token: 0x06002377 RID: 9079 RVA: 0x001995EC File Offset: 0x001977EC
private void CalculatePathsThreaded(PathHandler pathHandler)
{
try
{
long num = 100000L;
long targetTick = DateTime.UtcNow.Ticks + num;
for (;;)
{
Path path = this.queue.Pop();
IPathInternals pathInternals = path;
pathInternals.PrepareBase(pathHandler);
pathInternals.AdvanceState(PathState.Processing);
if (this.OnPathPreSearch != null)
{
this.OnPathPreSearch(path);
}
long ticks = DateTime.UtcNow.Ticks;
pathInternals.Prepare();
if (!path.IsDone())
{
this.astar.debugPathData = pathInternals.PathHandler;
this.astar.debugPathID = path.pathID;
pathInternals.Initialize();
while (!path.IsDone())
{
pathInternals.CalculateStep(targetTick);
targetTick = DateTime.UtcNow.Ticks + num;
if (this.queue.IsTerminating)
{
path.FailWithError("AstarPath object destroyed");
}
}
path.duration = (float)(DateTime.UtcNow.Ticks - ticks) * 0.0001f;
}
pathInternals.Cleanup();
if (path.immediateCallback != null)
{
path.immediateCallback(path);
}
if (this.OnPathPostSearch != null)
{
this.OnPathPostSearch(path);
}
this.returnQueue.Enqueue(path);
pathInternals.AdvanceState(PathState.ReturnQueue);
}
}
catch (Exception ex)
{
if (ex is ThreadAbortException || ex is ThreadControlQueue.QueueTerminationException)
{
if (this.astar.logPathResults == PathLog.Heavy)
{
Debug.LogWarning("Shutting down pathfinding thread #" + pathHandler.threadID);
}
return;
}
Debug.LogException(ex);
Debug.LogError("Unhandled exception during pathfinding. Terminating.");
this.queue.TerminateReceivers();
}
Debug.LogError("Error : This part should never be reached.");
this.queue.ReceiverTerminated();
}