Removed duplicate edges from platform mesh.

examples/14-shadowvolumes/platform.obj

@@ -1,20 +1,16 @@
 # Blender v2.66 (sub 1) OBJ File: ''
 # www.blender.org
-g Plane
+g Plane.002
 v -1.000000 -0.000000 1.000000
 v -1.000000 0.000000 -1.000000
 v 1.000000 0.000000 -1.000000
 v 1.000000 -0.000000 1.000000
 v 1.000000 0.081440 -1.000000
 v -1.000000 0.081440 -1.000000
-v -1.000000 0.081440 -1.000000
-v 1.000000 0.081440 -1.000000
 v 1.000000 0.081440 1.000000
 v -1.000000 0.081440 1.000000
 v -0.934893 0.081440 -0.934893
 v 0.934893 0.081440 -0.934893
-v 1.000000 0.081440 1.000000
-v -1.000000 0.081440 1.000000
 v -0.934893 0.081440 0.934893
 v 0.934893 0.081440 0.934893
 v 0.934893 0.140616 0.934893
@@ -26,19 +22,18 @@ vt 0.011681 0.988318
 vt 0.988318 0.988318
 vt 0.988318 0.011681
 vt 1.000000 1.000000
-vt 0.000000 1.000000
 vt 1.000000 0.000000
 vt 0.000000 0.000000
-vt 0.032554 0.967446
-vt 0.967446 0.967446
+vt 0.000000 1.000000
 vt 0.032554 0.032553
 vt 0.967446 0.032553
 vt 0.975715 0.024285
 vt 0.024285 0.024285
 vt 0.975715 0.975715
 vt 0.024285 0.975715
+vt 0.967446 0.967446
+vt 0.032554 0.967446
 vn 0.000000 -1.000000 -0.000000
-vn 0.000000 0.000000 0.000000
 vn 1.000000 0.000000 0.000000
 vn -1.000000 -0.000000 0.000000
 vn 0.000000 0.000000 1.000000
@@ -46,20 +41,16 @@ vn 0.000000 -0.000000 -1.000000
 vn 0.000000 1.000000 0.000000
 s off
 f 1/1/1 2/2/1 3/3/1 4/4/1
-f 5/5/2 6/6/2 7/6/2 8/5/2
-f 4/4/3 3/3/3 5/5/3 9/7/3
-f 2/2/4 1/1/4 10/8/4 6/6/4
-f 1/1/5 4/4/5 9/7/5 10/8/5
-f 3/3/6 2/2/6 6/6/6 5/5/6
-f 8/5/7 7/6/7 11/9/7 12/10/7
-f 9/7/2 5/5/2 8/5/2 13/7/2
-f 6/6/2 10/8/2 14/8/2 7/6/2
-f 10/8/2 9/7/2 13/7/2 14/8/2
-f 15/11/5 16/12/5 17/13/5 18/14/5
-f 13/7/7 8/5/7 12/10/7 16/12/7
-f 7/6/7 14/8/7 15/11/7 11/9/7
-f 14/8/7 13/7/7 16/12/7 15/11/7
-f 18/14/7 17/13/7 19/15/7 20/16/7
-f 12/10/6 11/9/6 20/16/6 19/15/6
-f 16/12/3 12/10/3 19/15/3 17/13/3
-f 11/9/4 15/11/4 18/14/4 20/16/4
+f 4/4/2 3/3/2 5/5/2 7/6/2
+f 2/2/3 1/1/3 8/7/3 6/8/3
+f 1/1/4 4/4/4 7/6/4 8/7/4
+f 3/3/5 2/2/5 6/8/5 5/5/5
+f 11/9/4 12/10/4 13/11/4 14/12/4
+f 14/12/6 13/11/6 15/13/6 16/14/6
+f 10/15/5 9/16/5 16/14/5 15/13/5
+f 12/10/2 10/15/2 15/13/2 13/11/2
+f 9/16/3 11/9/3 14/12/3 16/14/3
+f 5/5/6 6/8/6 9/16/6 10/15/6
+f 7/6/6 5/5/6 10/15/6 12/10/6
+f 6/8/6 8/7/6 11/9/6 9/16/6
+f 8/7/6 7/6/6 12/10/6 11/9/6