ZDoom

Because traditional nodes add extra vertices to the VERTEXES lumps. If you'd like to verify that ZDBSP does remove these excess vertices when it builds -z nodes, I'd be happy to make it an inequality. Mostly, I just didn't feel like checking what ZDBSP did with them, so I wrote the check to work with the case that is definitely wrong.

if (orgVerts > (DWORD)numvertexes)

[code]if (orgVerts > (DWORD)numvertexes)[/code]
Is there a reason it's not simply an inequality here? Does it work if orgVerts < (DWORD)numvertexes? Or is that scenario already rejected elsewhere (and then why wasn't an inequality used there)?

Fixed.

[quote="Sodaholic"][quote="Gez"]ZDBSP issue?[/quote]
It most certainly is. I've been having this problem ever since I switched over to UDMF[/quote]
Considering that just running the map through ZDBSP produces working nodes, I doubt it. Examining the nodes indicates that they were built for a map with 3876 vertexes. This map has 3864. This suggests that these nodes don't belong with this map and came from somewhere else.

While this probably still needs to be fixed, that version of the map has been scrapped anyway.

[quote="Gez"]ZDBSP issue?[/quote]
It most certainly is. I've been having this problem ever since I switched over to UDMF

0x000000000065cd41 in P_LoadGLZSegs (data=..., type=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:942
942                                     seg->frontsector = ldef->sidedef[side]->sector;
(gdb) bt
#0  0x000000000065cd41 in P_LoadGLZSegs (data=..., type=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:942
#1  0x000000000065d2ca in LoadZNodes (data=..., glnodes=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:1052
#2  0x000000000065d6de in P_LoadZNodes (dalump=..., id=1313621848)
    at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:1146
#3  0x0000000000663f5c in P_SetupLevel (lumpname=0xc23e38 "map02", position=0)
    at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:3682
#4  0x00000000005b2339 in G_DoLoadLevel (position=0, autosave=false)
    at /home/blzut3/Code/ZDoom/trunk/src/g_level.cpp:877
#5  0x00000000005b1691 in G_InitNew (mapname=0xe3614c "map02", bTitleLevel=false)
    at /home/blzut3/Code/ZDoom/trunk/src/g_level.cpp:449
#6  0x0000000000589bc7 in D_DoomMain () at /home/blzut3/Code/ZDoom/trunk/src/d_main.cpp:2323
#7  0x000000000054b50b in main (argc=7, argv=0x7fffffffe0e8) at /home/blzut3/Code/ZDoom/trunk/src/sdl/i_main.cpp:325

ldef = 0x1a72de8
seg = 0x14cf000
line = 3291
lineword = 3291
v1 = 2637
partner = 5
side = 1 '\001'
j = 0
i = 16

$2 = {v1 = 0x148abd0, v2 = 0x148ac68, dx = 5242880, dy = 0, flags = 1, activation = 1, special = 0, Alpha = 65536, 
  id = -1, args = {0, 0, 0, 0, 0}, firstid = 0, nextid = 0, sidedef = {0x1b66850, 0x0}, bbox = {58720256, 58720256, 
    47185920, 52428800}, slopetype = ST_HORIZONTAL, frontsector = 0x19ee980, backsector = 0x0, validcount = 0}

Since I don't really know what to expect out of the nodes I can't do anything myself but it's crashing on line 942 of p_setup.cpp:
[code]0x000000000065cd41 in P_LoadGLZSegs (data=..., type=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:942
942 seg->frontsector = ldef->sidedef[side]->sector;
(gdb) bt
#0 0x000000000065cd41 in P_LoadGLZSegs (data=..., type=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:942
#1 0x000000000065d2ca in LoadZNodes (data=..., glnodes=1) at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:1052
#2 0x000000000065d6de in P_LoadZNodes (dalump=..., id=1313621848)
at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:1146
#3 0x0000000000663f5c in P_SetupLevel (lumpname=0xc23e38 "map02", position=0)
at /home/blzut3/Code/ZDoom/trunk/src/p_setup.cpp:3682
#4 0x00000000005b2339 in G_DoLoadLevel (position=0, autosave=false)
at /home/blzut3/Code/ZDoom/trunk/src/g_level.cpp:877
#5 0x00000000005b1691 in G_InitNew (mapname=0xe3614c "map02", bTitleLevel=false)
at /home/blzut3/Code/ZDoom/trunk/src/g_level.cpp:449
#6 0x0000000000589bc7 in D_DoomMain () at /home/blzut3/Code/ZDoom/trunk/src/d_main.cpp:2323
#7 0x000000000054b50b in main (argc=7, argv=0x7fffffffe0e8) at /home/blzut3/Code/ZDoom/trunk/src/sdl/i_main.cpp:325[/code]
Locals
[code]ldef = 0x1a72de8
seg = 0x14cf000
line = 3291
lineword = 3291
v1 = 2637
partner = 5
side = 1 '\001'
j = 0
i = 16[/code]
ldef contains:
[code]$2 = {v1 = 0x148abd0, v2 = 0x148ac68, dx = 5242880, dy = 0, flags = 1, activation = 1, special = 0, Alpha = 65536,
id = -1, args = {0, 0, 0, 0, 0}, firstid = 0, nextid = 0, sidedef = {0x1b66850, 0x0}, bbox = {58720256, 58720256,
47185920, 52428800}, slopetype = ST_HORIZONTAL, frontsector = 0x19ee980, backsector = 0x0, validcount = 0}[/code]
As you can see since side = 1, it's trying to use a NULL pointer.

ZDBSP issue?

Your nodes are broken for some reason. Deleting the ZNODES lump allows it to run fine.

On certain maps, the engine inexplicably crashes upon map startup. It says something about an "Access violation", or something, trying to read address 00000000.

The map file is here: http://files.drdteam.org/index.php/files/get/fQFxB7EMG_/map02flipped.zip
I will only give the password to the zip to developers, as this map is meant to be private. (will be public in a few months, but it's not ready for release yet)

Here is the crash report: http://files.drdteam.org/index.php/files/get/UvzhjlCk0n/crashreport.zip