# HG changeset patch
# User Nicolas Saunier <nicolas.saunier@polymtl.ca>
# Date 1453502589 18000
# Node ID bd13937818a4a7f009db4bd5f13553eee115a453
# Parent  0f6b0f63eb073dfd4d2612b1be8afb913ff91d78
minor bug fix

diff -r 0f6b0f63eb07 -r bd13937818a4 python/moving.py
--- a/python/moving.py	Thu Jan 21 23:44:51 2016 -0500
+++ b/python/moving.py	Fri Jan 22 17:43:09 2016 -0500
@@ -217,6 +217,10 @@
     def plot(self, options = 'o', **kwargs):
         plot([self.x], [self.y], options, **kwargs)
 
+    @staticmethod
+    def plotSegment(p1, p2, options = 'o', **kwargs):
+        plot([p1.x, p2.x], [p1.y, p2.y], options, **kwargs)
+
     def norm2Squared(self):
         '''2-norm distance (Euclidean distance)'''
         return self.x**2+self.y**2
@@ -845,14 +849,14 @@
     def getIntersections(self, p1, p2):
         '''Returns a list of the indices at which the trajectory 
         intersects with the segment of extremities p1 and p2 
-        the list is empty if there is no crossing'''
+        Returns an empty list if there is no crossing'''
         indices = []
         intersections = []
 
         for i in xrange(self.length()-1):
             q1=self.__getitem__(i)
             q2=self.__getitem__(i+1)
-            p = utils.segmentIntersection(q1, q2, p1, p2)
+            p = segmentIntersection(q1, q2, p1, p2)
             if p is not None:
                 if q1.x != q2.x:
                     ratio = (p.x-q1.x)/(q2.x-q1.x)
@@ -862,19 +866,19 @@
                     ratio = 0
                 indices.append(i+ratio)
                 intersections.append(p)
-        return indices
+        return indices, intersections
 
     def getLineIntersections(self, p1, p2):
         '''Returns a list of the indices at which the trajectory 
-        intersects with the segment of extremities p1 and p2 
-        the list is empty if there is no crossing'''
+        intersects with the line going through p1 and p2 
+        Returns an empty list if there is no crossing'''
         indices = []
         intersections = []
         
         for i in xrange(self.length()-1):
             q1=self.__getitem__(i)
             q2=self.__getitem__(i+1)
-            p = utils.segmentLineIntersection(p1, p2, q1, q2)
+            p = segmentLineIntersection(p1, p2, q1, q2)
             if p is not None:
                 if q1.x != q2.x:
                     ratio = (p.x-q1.x)/(q2.x-q1.x)
@@ -989,7 +993,7 @@
         '''Returns a list of the indices at which the trajectory 
         goes past the curvilinear coordinate S1
         (in provided lane if lane is not None)
-        the list is empty if there is no crossing'''
+        Returns an empty list if there is no crossing'''
         indices = []
         for i in xrange(self.length()-1):
             q1=self.__getitem__(i)