From 955761f46fcec73c91c5dbf2547b6f88afb5d3fc Mon Sep 17 00:00:00 2001
From: Mikko Mononen <memononen@gmail.com>
Date: Mon, 16 Apr 2018 11:24:04 +0300
Subject: [PATCH] Fix for #22

- handle degenerate cases better in CheckForRightSplice()
---
 Source/sweep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/sweep.c b/Source/sweep.c
index 112f1ef..4f3c53e 100755
--- a/Source/sweep.c
+++ b/Source/sweep.c
@@ -493,7 +493,7 @@ static int CheckForRightSplice( TESStesselator *tess, ActiveRegion *regUp )
 			SpliceMergeVertices( tess, eLo->Oprev, eUp );
 		}
 	} else {
-		if( EdgeSign( eUp->Dst, eLo->Org, eUp->Org ) < 0 ) return FALSE;
+		if( EdgeSign( eUp->Dst, eLo->Org, eUp->Org ) <= 0 ) return FALSE;
 
 		/* eLo->Org appears to be above eUp, so splice eLo->Org into eUp */
 		RegionAbove(regUp)->dirty = regUp->dirty = TRUE;