From: dooglus <dooglus@1f10aa63-cdf2-0310-b900-c93c546f37ac>
Date: Wed, 2 Apr 2008 12:36:03 +0000 (+0000)
Subject: Avoid division by zero when approximating a circle by two points.
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=8f58d98b60c5b3662a9037dcba1dac6203b04d72;p=synfig.git

Avoid division by zero when approximating a circle by two points.


git-svn-id: http://svn.voria.com/code@1954 1f10aa63-cdf2-0310-b900-c93c546f37ac
---

diff --git a/synfig-studio/trunk/src/gtkmm/state_circle.cpp b/synfig-studio/trunk/src/gtkmm/state_circle.cpp
index f501d16..baf6786 100644
--- a/synfig-studio/trunk/src/gtkmm/state_circle.cpp
+++ b/synfig-studio/trunk/src/gtkmm/state_circle.cpp
@@ -519,7 +519,9 @@ StateCircle_Context::make_circle(const Point& _p1, const Point& _p2)
 	Real radius((p2-p1).mag());
 	int points = get_number_of_bline_points();
 	Angle::deg angle(360.0/points);
-	Real tangent(4 * (2 * Angle::cos(angle/2).get() - Angle::cos(angle).get() - 1) / Angle::sin(angle).get());
+	Real tangent(4 * ((points == 2)
+					  ? 1
+					  : ((2 * Angle::cos(angle/2).get() - Angle::cos(angle).get() - 1) / Angle::sin(angle).get())));
 	Real x(p1[0]), y(p1[1]);
 
 	std::vector<BLinePoint> new_list;