[vtkusers] [Insight-users] get bounds an actor in thread

[David Cole]

You have to synchronize access to VTK objects with the main GUI thread, 
where they typically exist and are called from.

VTK is not, generally speaking, safe for access from multiple threads 
unless you take care to lock your access to them with a mutex or 
similar locking mechanism.


HTH,
David


-----Original Message-----
From: yas --- <yas2349 at gmail.com>
To: vtkusers <vtkusers at vtk.org>; insight-users <insight-users at vtk.org>
Sent: Mon, Apr 15, 2013 4:16 pm
Subject: [Insight-users] get bounds an actor in thread


I write follow code  in  a thread.

void updateHaptics(void)
{
   
while(simulationRunning )

     {
   double bounds[6];

   toolactor->Getbounds(bounds);


       }
simulationRunning=false;
     
    }
   
    // exit haptics thread
    simulationFinished = true;

}

beacuse of use from   Getbounds function ,after running ,this is follow 
error:

Error: in VTK\Filtering\vtkExcutive in line 783



vtkErrorMacro(<< method << " invoked during another request.  "
                    "Returning failure to algorithm "
                    << this->Algorithm->GetClassName(
) << "("
                    << this->Algorithm << ").");



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