--- a/python/moving.py	Mon Apr 12 15:54:20 2010 -0400
+++ b/python/moving.py	Tue May 18 17:35:09 2010 -0400
@@ -141,6 +141,24 @@
         '''
         return Point(self.x-other.x, self.y-other.y)
 
+    def norm2Squared(self):
+        '''2-norm distance (Euclidean distance)
+        >>> Point(3,2).norm2Squared()
+        13
+        '''
+        return self.x*self.x+self.y*self.y
+
+    def norm2(self):
+        '2-norm distance (Euclidean distance)'
+        return sqrt(self.norm2Squared())
+
+    def distanceNorm2(p1, p2):
+        '''
+        >>> Point.distanceNorm2(Point(3,4),Point(1,7))
+        3.6055512754639891
+        '''
+        return (p1-p2).norm2()
+
     def aslist(self):
         return [self.x, self.y]
 
@@ -227,6 +245,18 @@
     def length(self):
         return self.timeInterval.length()
 
+    def getPositions(self):
+        return self.positions
+
+    def getVelocities(self):
+        return self.velocities
+
+    def getPositionAt(self, i):
+        return self.positions[i]
+
+    def getVelocityAt(self, i):
+        return self.velocities[i]
+
     def getXCoordinates(self):
         return self.positions.getXCoordinates()