ADD: custom object to node distance rank

src/mhtree/ObjectToNodeDistanceRank.java

@@ -2,6 +2,8 @@ package mhtree;
 
 import messif.objects.LocalAbstractObject;
 
+import static mhtree.ObjectToNodeDistance.NEAREST;
+
 /**
  * Represents the rank of a node in the priority queue in a query operation.
  */
@@ -12,7 +14,16 @@ public class ObjectToNodeDistanceRank implements Comparable<ObjectToNodeDistance
 
     public ObjectToNodeDistanceRank(LocalAbstractObject object, Node node) {
         this.node = node;
-        this.distance = node.getDistance(object);
+
+        if (node.isLeaf()) {
+            this.distance = NEAREST.getDistance(object, node);
+        } else {
+            if (node.isCovered(object)) {
+                this.distance = -node.getDistance(object);
+            } else {
+                this.distance = node.getDistance(object);
+            }
+        }
     }
 
     @Override

src/mhtree/benchmarking/RunBenchmark.java

@@ -52,7 +52,7 @@ public class RunBenchmark {
                         objectToNodeDistance
                 ),
                 objects,
-                new int[]{1, 10, 25, 50, 100}
+                new int[]{1, 10, 50, 100}
         );
     }