Tweak and minor fix on maximum iteration

- added detection of early complete operation when doing tracking and there is no more object to track.
- fixed an issue which was causing the double of maximum allowed number of iteration to be processed on contours (not really hurting but it was slower because of that).

src/plugins/adufour/activecontours/ActiveContour.java

@@ -29,6 +29,7 @@ public abstract class ActiveContour extends Detection implements Iterable<Point3
     protected int id;
 
     protected SlidingWindow convergence;
+    protected int lastConvergedFrame;
 
     protected VarDouble sampling = new VarDouble("sampling", 1.0);
 
@@ -47,6 +48,7 @@ public abstract class ActiveContour extends Detection implements Iterable<Point3
 
         name = "";
         id = -1;
+        lastConvergedFrame = -1;
     }
 
     @SuppressWarnings("unchecked")
@@ -56,6 +58,7 @@ public abstract class ActiveContour extends Detection implements Iterable<Point3
 
         name = "";
         id = -1;
+        lastConvergedFrame = -1;
 
         // follow and shortcut references to avoid memory leaks
         while (sampling.getReference() != null)
@@ -350,6 +353,16 @@ public abstract class ActiveContour extends Detection implements Iterable<Point3
      */
     public abstract boolean hasConverged(SlidingWindow.Operation operation, double epsilon);
 
+    public int getLastConvergedFrame()
+    {
+        return lastConvergedFrame;
+    }
+
+    public void setLastConvergedFrame(int frame)
+    {
+        lastConvergedFrame = frame;
+    }
+
     public void setDivisionSensitivity(Var<Double> divisionSensitivity)
     {
         this.divisionSensitivity = divisionSensitivity;