From 89cb2479232ea949b368e849d90fd6ce563154c1 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Mon, 11 Jan 2016 13:01:01 +0100
Subject: [PATCH] + handle degenerated ellipse for SVG output

---
 src/Mod/Drawing/App/DrawingExport.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Mod/Drawing/App/DrawingExport.cpp b/src/Mod/Drawing/App/DrawingExport.cpp
index 2cbdde8c3..b41dc08c1 100644
--- a/src/Mod/Drawing/App/DrawingExport.cpp
+++ b/src/Mod/Drawing/App/DrawingExport.cpp
@@ -257,6 +257,14 @@ void SVGOutput::printEllipse(const BRepAdaptor_Curve& c, int id, std::ostream& o
     gp_Pnt m = c.Value((l+f)/2.0);
     gp_Pnt e = c.Value(l);
 
+    // If the minor radius is very small compared to the major radius
+    // the geometry actually degenerates to a line
+    double ratio = std::min(r1,r2)/std::max(r1,r2);
+    if (ratio < 0.001) {
+        printGeneric(c, id, out);
+        return;
+    }
+
     gp_Vec v1(m,s);
     gp_Vec v2(m,e);
     gp_Vec v3(0,0,1);