From 84f8c299ce9e9924c0e54435403e259e1dace3ed Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Thu, 26 Feb 2015 12:08:52 +0100
Subject: [PATCH] - fixed: cached GL nodes should use ZGL3 format for maximum
 precision.

---
 src/p_glnodes.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/p_glnodes.cpp b/src/p_glnodes.cpp
index 15b97b9e61..1b34e8bbc2 100644
--- a/src/p_glnodes.cpp
+++ b/src/p_glnodes.cpp
@@ -1116,10 +1116,10 @@ static void CreateCachedNodes(MapData *map)
 	WriteLong(ZNodes, numnodes);
 	for(int i=0;i<numnodes;i++)
 	{
-		WriteWord(ZNodes, nodes[i].x >> FRACBITS);
-		WriteWord(ZNodes, nodes[i].y >> FRACBITS);
-		WriteWord(ZNodes, nodes[i].dx >> FRACBITS);
-		WriteWord(ZNodes, nodes[i].dy >> FRACBITS);
+		WriteLong(ZNodes, nodes[i].x);
+		WriteLong(ZNodes, nodes[i].y);
+		WriteLong(ZNodes, nodes[i].dx);
+		WriteLong(ZNodes, nodes[i].dy);
 		for (int j = 0; j < 2; ++j)
 		{
 			for (int k = 0; k < 4; ++k)
@@ -1168,7 +1168,7 @@ static void CreateCachedNodes(MapData *map)
 		DWORD ndx[2] = {LittleLong(DWORD(lines[i].v1 - vertexes)), LittleLong(DWORD(lines[i].v2 - vertexes)) };
 		memcpy(compressed+8+16+8*i, ndx, 8);
 	}
-	memcpy(compressed + offset - 4, "ZGL2", 4);
+	memcpy(compressed + offset - 4, "ZGL3", 4);
 
 	FString path = CreateCacheName(map, true);
 	FILE *f = fopen(path, "wb");
@@ -1218,7 +1218,7 @@ static bool CheckCachedNodes(MapData *map)
 	if (fread(verts, 8, numlin, f) != numlin) goto errorout;
 
 	if (fread(magic, 1, 4, f) != 4) goto errorout;
-	if (memcmp(magic, "ZGL2", 4))  goto errorout;
+	if (memcmp(magic, "ZGL2", 4) && memcmp(magic, "ZGL3", 4))  goto errorout;
 
 
 	try
@@ -1226,7 +1226,7 @@ static bool CheckCachedNodes(MapData *map)
 		long pos = ftell(f);
 		FileReader fr(f);
 		fr.Seek(pos, SEEK_SET);
-		P_LoadZNodes (fr, MAKE_ID('Z','G','L','2'));
+		P_LoadZNodes (fr, MAKE_ID(magic[0],magic[1],magic[2],magic[3]));
 	}
 	catch (CRecoverableError &error)
 	{