GraphEditResetHulls now has options to reset only outgoing or incoming edges.

src/MATLAB/+Tracker/GraphEditsResetHulls.m

 % GraphEditsResetHulls(hulls)
-% Resets (zeros) all user edits into and out of a hull, updates associated
-% cached costs.
+% Resets (zeros) all user edits into (bResetBack) and out of (bResetForward)
+% a hull, updates associated cached costs.
 
-function GraphEditsResetHulls(hulls)
+function GraphEditsResetHulls(hulls, bResetForward, bResetBack)
     global Costs GraphEdits
     
+    if ( ~exist('bResetForward','var') )
+        bResetForward = 1;
+    end
+    
+    if ( ~exist('bResetBack','var') )
+        bResetBack = 1;
+    end
+    
     toHulls = hulls;
     fromHulls = hulls;
     
+    if ( ~bResetForward && ~bResetBack )
+        return;
+    end
+    
+    for i=1:length(hulls)
+        toHulls = union(toHulls, find((Costs(hulls(i),:) > 0) | (GraphEdits(hulls(i),:) > 0)));
+        fromHulls = union(fromHulls, find((Costs(:,hulls(i)) > 0) | (GraphEdits(:,hulls(i)) > 0)));
+    end
+    
+    if ( bResetForward )
         for i=1:length(hulls)
             GraphEdits(hulls(i),:) = 0;
-        GraphEdits(:,hulls(i)) = 0;
+        end
+    end
     
-        toHulls = union(toHulls, find(Costs(hulls(i),:) > 0));
-        fromHulls = union(fromHulls, find(Costs(:,hulls(i)) > 0));
+    if ( bResetBack )
+        for i=1:length(hulls)
+            GraphEdits(:,hulls(i)) = 0;
+        end
     end
     
     Tracker.UpdateCachedCosts(fromHulls, toHulls);