From 47aef34aa0f218d21bd5c261e22bb6483c1ae876 Mon Sep 17 00:00:00 2001
From: Seth Hillbrand <hillbrand@ucdavis.edu>
Date: Wed, 12 Sep 2018 09:19:35 -0700
Subject: [PATCH] 3d-viewer: Check for at least 3 segments in circle

Fixes: lp:1792173
* https://bugs.launchpad.net/kicad/+bug/1792173
---
 3d-viewer/3d_canvas/cinfo3d_visu.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/3d-viewer/3d_canvas/cinfo3d_visu.cpp b/3d-viewer/3d_canvas/cinfo3d_visu.cpp
index 1f5676df7..37301ee65 100644
--- a/3d-viewer/3d_canvas/cinfo3d_visu.cpp
+++ b/3d-viewer/3d_canvas/cinfo3d_visu.cpp
@@ -256,7 +256,8 @@ unsigned int CINFO3D_VISU::GetNrSegmentsCircle( int aDiameterBIU ) const
 {
     wxASSERT( aDiameterBIU > 0 );
 
-    return GetArcToSegmentCount( aDiameterBIU / 2, ARC_HIGH_DEF, 360.0 );
+    // Require at least 3 segments for a circle
+    return std::max( GetArcToSegmentCount( aDiameterBIU / 2, ARC_HIGH_DEF, 360.0 ), 3 );
 }
 
 
-- 
2.11.0