Don't crash on illegal polygon winding - write an error and skip the object

git-svn-id: http://svn.clifford.at/openscad/trunk@488 b57f626f-c46c-0410-a088-ec61d464b74c

1 files changed, 15 insertions, 0 deletions

diff --git a/testdata/polygon-illegal-winding.scad b/testdata/polygon-illegal-winding.scad
new file mode 100644
index 0000000..612154a
--- /dev/null
+++ b/testdata/polygon-illegal-winding.scad
@@ -0,0 +1,15 @@
+polyhedron
+  (points = [
+         [0, -10, 60], [0, 10, 60], [0, 10, 0], [0, -10, 0], [60, -10, 
+60], [60, 10, 60],
+         [10, -10, 50], [10, 10, 50], [10, 10, 30], [10, -10, 30], [30, 
+-10, 50], [30, 10, 50]
+         ],
+   triangles = [
+        [0,2,3],   [0,1,2],  [0,4,5],  [0,5,1],   [5,4,2],  [2,4,3],
+                [6,8,9],  [6,7,8],  [6,10,11], [6,11,7], [10,8,11],
+        [10,9,8], [0,3,9],  [9,0,6], [10,6, 0],  [0,4,10],
+                [3,9,10], [3,10,4], [1,7,11],  [1,11,5], [1,7,8], 
+                [1,8,2],  [2,8,11], [2,11,5]
+        ]
+   );