--- a/python/events.py	Thu Jul 18 02:08:51 2013 -0400
+++ b/python/events.py	Thu Jul 18 21:55:17 2013 -0400
@@ -96,14 +96,10 @@
         # todo test for interaction instants and interval, compute indicators
 
         # if we have features, compute other indicators
-        if self.roadUser1.features and self.roadUser2.features:
-            from scipy.spatial.distance import cdist
+        if self.roadUser1.features != None and self.roadUser2.features != None:
             minDistance={}
             for instant in self.timeInterval:
-                positions1 = [f.getPositionAtInstant(instant).astuple() for f in self.roadUser1.features if f.existsAtInstant(instant)]
-                positions2 = [f.getPositionAtInstant(instant).astuple() for f in self.roadUser2.features if f.existsAtInstant(instant)]
-                distance = cdist(positions1, positions2, metric = 'euclidean')
-                minDistance[instant] = distance.min()
+                minDistance[instant] = MovingObject.minDistance(self.roadUser1, self.roadUser2, instant)
             self.addIndicator(indicators.SeverityIndicator('Minimum Distance', minDistance))
 
     def computeCrossingsCollisions(self, predictionParameters, collisionDistanceThreshold, timeHorizon, computeCZ = False, debug = False, timeInterval = None):