From 6eb77d0bc063783482d7a3f69a83ac99de2b38ee Mon Sep 17 00:00:00 2001
From: boris_i <boris_i@e0d998f2-2e9b-42fe-843d-47128df60a06>
Date: Sun, 28 Jun 2009 14:47:21 +0000
Subject: [PATCH] Fixed a bug where flipping a line resulted in a crash, if its
start vertex did not belong to any other line
---
Source/Core/Map/Linedef.cs | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Source/Core/Map/Linedef.cs b/Source/Core/Map/Linedef.cs
index 67f25ffe1..1cecabcbc 100644
--- a/Source/Core/Map/Linedef.cs
+++ b/Source/Core/Map/Linedef.cs
@@ -547,11 +547,17 @@ namespace CodeImp.DoomBuilder.Map
// This flips the linedef's vertex attachments
public void FlipVertices()
{
+ // make sure the start/end vertices are not automatically
+ // deleted if they do not belong to any other line
+ General.Map.Map.AutoRemove = false;
+
// Flip vertices
Vertex oldstart = start;
Vertex oldend = end;
SetStartVertex(oldend);
SetEndVertex(oldstart);
+
+ General.Map.Map.AutoRemove = true;
// For drawing, the interior now lies on the other side
frontinterior = !frontinterior;
--
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