[GRASS-SVN] r30466 - grass/trunk/swig/python/examples

[svn_grass at osgeo.org]

Author: hamish
Date: 2008-03-04 11:48:13 -0500 (Tue, 04 Mar 2008)
New Revision: 30466

Modified:
   grass/trunk/swig/python/examples/m.distance
Log:
easier index math

Modified: grass/trunk/swig/python/examples/m.distance
===================================================================
--- grass/trunk/swig/python/examples/m.distance	2008-03-04 14:54:24 UTC (rev 30465)
+++ grass/trunk/swig/python/examples/m.distance	2008-03-04 16:48:13 UTC (rev 30466)
@@ -113,21 +113,21 @@
     x = [x1]
     y = [y1]
 
-    for i in range((len(coords) / 2) - 1):
+    for i in range(1, (len(coords) / 2)):
 
         if proj_type == 2:
-            g6lib.G_scan_easting(coords[ (i+1)*2 + 0 ], eastPtr, 3)
-            g6lib.G_scan_northing(coords[ (i+1)*2 + 1 ], northPtr, 3)
+            g6lib.G_scan_easting (coords[ i*2 + 0 ], eastPtr, 3)
+            g6lib.G_scan_northing(coords[ i*2 + 1 ], northPtr, 3)
             x2 = float(easting)
             y2 = float(northing)
         else:
-            x2 = float(coords[ (i+1)*2 + 0 ])
-            y2 = float(coords[ (i+1)*2 + 1 ])
+            x2 = float(coords[ i*2 + 0 ])
+            y2 = float(coords[ i*2 + 1 ])
 
         segment_distance = g6lib.G_distance(x1, y1, x2, y2)
         overall_distance += segment_distance
 
-        print "segment %d distance is %.2f meters" % (i+1, segment_distance)
+        print "segment %d distance is %.2f meters" % (i, segment_distance)
 
         # add to the area array