1 files changed, 16 insertions, 0 deletions
diff --git a/testdata/scad/misc/normal-nan.scad b/testdata/scad/misc/normal-nan.scad
new file mode 100644
index 0000000..1c3f6ce
--- /dev/null
+++ b/testdata/scad/misc/normal-nan.scad
@@ -0,0 +1,16 @@
+/*
+  When exporting this to STL, null polygons appear, causing
+  problems normalizing normal vectors (nan output in STL files)
+*/
+
+$fs=0.2;
+
+difference() {  
+  cube(8);
+ 
+  translate([0,20,4]) rotate([90,0,0]) union() {
+    translate([0,-3,14.5]) cube([5.4,6,2.4],center=true);
+    translate([0,0,13.3]) rotate([0,0,30]) cylinder(r=3.115,h=2.4,$fn=6);
+  }
+}
+