From 3487678ca142fd9c3a9ff257d927a4f9fa2a7bc4 Mon Sep 17 00:00:00 2001
From: kintel <kintel@b57f626f-c46c-0410-a088-ec61d464b74c>
Date: Sat, 30 Jan 2010 20:08:50 +0000
Subject: Avoid trying to evaluate arcs/circles/ellipses with 0 radius

git-svn-id: http://svn.clifford.at/openscad/trunk@381 b57f626f-c46c-0410-a088-ec61d464b74c

diff --git a/src/primitives.cc b/src/primitives.cc
index 4aeec53..9fea2e9 100644
--- a/src/primitives.cc
+++ b/src/primitives.cc
@@ -194,6 +194,7 @@ void register_builtin_primitives()
 */
 int get_fragments_from_r(double r, double fn, double fs, double fa)
 {
+	if (r < GRID_FINE) return 0;
 	if (fn > 0.0)
 		return (int)fn;
 	return (int)ceil(fmax(fmin(360.0 / fa, r*M_PI / fs), 5));
-- 
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