Corrected approach to restarting the optimizer.

Author: richardbeare

include/itkArrivalFunctionToPathFilter.h

@@ -250,6 +250,11 @@ class ITK_TEMPLATE_EXPORT ArrivalFunctionToPathFilter : public ImageToPathFilter
   typename OptimizerType::MeasureType m_TerminationValue;
   std::vector<PointsContainerType>    m_PointList;
   unsigned int                        m_CurrentOutput;
+
+  // variable for communicating state of a multisegment path
+  // Sometimes an optimizer may terminate during one segment of the
+  // path, and needs to be restarted
+  bool m_TrackingPath;
 };
 
 } // end namespace itk

include/itkArrivalFunctionToPathFilter.hxx

@@ -195,7 +195,10 @@ ArrivalFunctionToPathFilter<TInputImage, TOutputPath>::GenerateData()
     m_Optimizer->SetInitialPosition(end);
 
     // Use optimizer to back propagate from end point
-    m_Optimizer->StartOptimization();
+    m_TrackingPath = false;
+    do {
+      m_Optimizer->StartOptimization();
+    } while(m_TrackingPath);
   }
 
   // Clean up by removing observer