Port HeXen: Edge Of Chaos to dhewm3 #32

LegendaryGuard · 2023-07-26T22:28:34Z

I would like to contribute adding an old mod into a new branch in the repository. Currently, the mod works in a vanilla Doom3 game with 1.3.1 patch.

https://github.com/LegendaryGuard/HeXen_Edge_Of_Chaos

HEOC source code has been publicly released on moddb: https://www.moddb.com/mods/hexen-edge-of-chaos/downloads/hexen-edge-of-chaos-demo-source-patch

I'm working to make it work in dhewm3, I haven't finished to write the README yet.

Any help and review is welcomed.

…le types into float in d3xp

…ai, gamesys and physics

…rt 2)

… code in game directory (final part)

…de precompile.h thingy

LegendaryGuard · 2023-07-26T22:30:29Z

Could someone give me a hand? I'm trying to compile completely the source code and run as should in dhewm3.

It isn't the first time I'm working in a C++ project here, I tried to generate a Visual Studio solution in Windows, but I get errors:

The C compiler identification is unknown
The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:2 (project):
  No CMAKE_C_COMPILER could be found.



CMake Error at CMakeLists.txt:2 (project):
  No CMAKE_CXX_COMPILER could be found.



Configuring incomplete, errors occurred!
See also "C:/msys64/home/user/heoc_dhewm3/build/CMakeFiles/CMakeOutput.log".
See also "C:/msys64/home/user/heoc_dhewm3/build/CMakeFiles/CMakeError.log".

CMakeError.log:

Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler:  
Build flags: 
Id flags: 

The output was:
1
Microsoft (R) Build Engine version 14.0.25420.1
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 27/07/2023 0:24:29.
Project "C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdC\CompilerIdC.vcxproj" on node 1 (default targets).
PrepareForBuild:
  Creating directory "Debug\".
  Creating directory "Debug\CompilerIdC.tlog\".
InitializeBuildStatus:
  Creating "Debug\CompilerIdC.tlog\unsuccessfulbuild" because "AlwaysCreate" was specified.
ClCompile:
  CL.exe /c /nologo /W0 /WX- /Od /Oy- /D _MBCS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /Fo"Debug\\" /Fd"Debug\vc140.pdb" /Gd /TC /analyze- /errorReport:queue CMakeCCompilerId.c
TRACKER : error TRK0005: Failed to locate: "CL.exe". El sistema no puede encontrar el archivo especificado. [C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdC\CompilerIdC.vcxproj]
  
  
Done Building Project "C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdC\CompilerIdC.vcxproj" (default targets) -- FAILED.

Build FAILED.

"C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdC\CompilerIdC.vcxproj" (default target) (1) ->
(ClCompile target) -> 
  TRACKER : error TRK0005: Failed to locate: "CL.exe". El sistema no puede encontrar el archivo especificado. [C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdC\CompilerIdC.vcxproj]

    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:00.34


Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler:  
Build flags: 
Id flags: 

The output was:
1
Microsoft (R) Build Engine version 14.0.25420.1
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 27/07/2023 0:24:30.
Project "C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdCXX\CompilerIdCXX.vcxproj" on node 1 (default targets).
PrepareForBuild:
  Creating directory "Debug\".
  Creating directory "Debug\CompilerIdCXX.tlog\".
InitializeBuildStatus:
  Creating "Debug\CompilerIdCXX.tlog\unsuccessfulbuild" because "AlwaysCreate" was specified.
ClCompile:
  CL.exe /c /nologo /W0 /WX- /Od /Oy- /D _MBCS /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /Fo"Debug\\" /Fd"Debug\vc140.pdb" /Gd /TP /analyze- /errorReport:queue CMakeCXXCompilerId.cpp
TRACKER : error TRK0005: Failed to locate: "CL.exe". El sistema no puede encontrar el archivo especificado. [C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdCXX\CompilerIdCXX.vcxproj]
  
  
Done Building Project "C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdCXX\CompilerIdCXX.vcxproj" (default targets) -- FAILED.

Build FAILED.

"C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdCXX\CompilerIdCXX.vcxproj" (default target) (1) ->
(ClCompile target) -> 
  TRACKER : error TRK0005: Failed to locate: "CL.exe". El sistema no puede encontrar el archivo especificado. [C:\msys64\home\user\heoc_dhewm3\build\CMakeFiles\3.5.2\CompilerIdCXX\CompilerIdCXX.vcxproj]

    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:00.33

I tried to compile in Linux, but I get these errors and I don't know what's wrong:

/home/user/heoc_dhewm3/game/Player.h:311:14: error: ‘idProjectile’ was not declared in this scope; did you mean ‘idObjective’?
  311 |  idEntityPtr<idProjectile> soulCubeProjectile;
      |              ^~~~~~~~~~~~
      |              idObjective
/home/user/heoc_dhewm3/game/Player.h:311:26: error: template argument 1 is invalid
  311 |  idEntityPtr<idProjectile> soulCubeProjectile;
      |                          ^
/home/user/heoc_dhewm3/game/Player.h:502:34: error: ‘idProjectile’ has not been declared
  502 |  void     SetSoulCubeProjectile( idProjectile *projectile );
      |                                  ^~~~~~~~~~~~

DanielGibson · 2023-07-26T22:58:21Z

HEOC source code has been released in public domain

Where does it say that it's in the public domain? The README says

(...)

This package is made available with the intention that:

you abide by the Doom3 SDK License.
(...)

Which means that it's under the Doom3 SDK License - to be compatible with dhewm3's license, it must be under GPL, so the original authors must relicense their patch under GPL (or simply agree that it's used with the GPLv3 source of open source Doom3).

Regarding your compile problems: The Windows errors looks like you told CMake to build with Visual Studio, but it couldn't find it, or its compiler (cl.exe) - do you have it installed?.

The compile error on Linux looks like there's an #include missing in Player.h, so the definition of idProjectile is available there - probably #include "Projectile.h"

LegendaryGuard · 2023-07-26T23:22:25Z

Which means that it's under the Doom3 SDK License - to be compatible with dhewm3's license, it must be under GPL, so the original authors must relicense their patch under GPL (or simply agree that it's used with the GPLv3 source of open source Doom3).

I sent an email in https://hexenmod.com/ to ask about that. No response from them.

Also I tried to search the authors in idtech 4 Discord server. No one of them are there.

The source code is still public and there are no license from the authors (but only Doom3 SDK license), looks like they didn't care about that.

Regarding your compile problems: The Windows errors looks like you told CMake to build with Visual Studio, but it couldn't find it, or its compiler (cl.exe) - do you have it installed?.

Looks like this CMake only supports Visual Studio 2019, 2017 or older, so I managed to install and configure the tools correctly as I could. So, it needed the 'build environment C++ tools' part installed.

The compile error on Linux looks like there's an #include missing in Player.h, so the definition of idProjectile is available there - probably #include "Projectile.h"

It's already included: https://github.com/dhewm/dhewm3-sdk/pull/32/files#diff-db89ff4435f28b0d2ebaacc8aab8e31c3f553256a76756271a608d41ad04c761L38

I don't know what's going on with this error, keeps outputing.

DanielGibson · 2023-07-26T23:29:11Z

https://www.moddb.com/mods/hexen-edge-of-chaos/news/team-updates-project-updates mentions hexen.team@gmail.com - have you tried that email address?

Maybe there are other compiler errors before that one?
Always scroll up in the compiler output and fix the first error(s) first, often that also resolves later errors

LegendaryGuard · 2023-07-27T10:35:46Z

https://www.moddb.com/mods/hexen-edge-of-chaos/news/team-updates-project-updates mentions hexen.team@gmail.com - have you tried that email address?

I already told:
I sent an email in https://hexenmod.com/ to ask about that. (in the last posted news (March 12th) mentions hexen.team@gmail.com too)

Maybe there are other compiler errors before that one? Always scroll up in the compiler output and fix the first error(s) first, often that also resolves later errors

I tried to fix, no idea what's going on, d3xp outputs no errors compared to the other.
Here the full compiler log: https://pastebin.com/dF4DYGjg

…nding headers if you want to use them

… fixes

LegendaryGuard · 2023-07-28T21:19:47Z

Ok, I fixed all the code to be compiled successfully in Windows and Linux.
I run the game using the release builds. But when I try the "new game", it shows these annoying assertions errors (I post the links of the lines of code of these errors here):
https://github.com/LegendaryGuard/dhewm3-sdk/blob/hexeneoc/idlib/containers/List.h#L154

https://github.com/LegendaryGuard/dhewm3-sdk/blob/hexeneoc/idlib/containers/StrPool.h#L157

Same when I try to load the map with map hexen/test/some_map command.
https://github.com/LegendaryGuard/dhewm3-sdk/blob/hexeneoc/game/script/Script_Program.h#L234

https://github.com/LegendaryGuard/dhewm3-sdk/blob/hexeneoc/idlib/Heap.h#L821

I wonder why changed the values for the assertions when this isn't supposed to happen.

…ons using #ifdef _DEBUG && 0

LegendaryGuard · 2023-07-30T22:01:52Z

I'm debugging deeply as I can. So, when I break one of the barrels/pots, the script in this part works:

But when I'm picking up one of the items like blue little health item, blue triangle, green cube and red sphere, looks like it's becoming NULL for some reason and after the game crashes (same happens with "pickup_effect" on them, no matter what, tries to search the "object" thing):

…g is wrong with calling a script object in a function

LegendaryGuard · 2023-07-31T15:07:10Z

I finished to port everything of HEOC to dhewm3 in a stable state.

https://www.moddb.com/games/doom-iii/downloads/hexen-edge-of-chaos-dhewm3-edition

Btw, no response from the authors. They didn't give a damn about sharing the source code, they haven't licensed nothing, apart from the Doom3 SDK.

…ike ammo or health, that crashes on dhewm3, it works better with inv_carry only

… with '&& 0'

LegendaryGuard · 2025-12-16T23:47:01Z

Finally, thanks to the replies from the main coder from HEOC team, the source code has been licensed as says in this part from LICENSE.txt:

The modifications are free software; you can redistribute them and/or modify
them under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 2 of the License, or (at your option) any
later version.

Btw, the README.md here needs some modifications, tell me what I should do and I'll prepare to complete this PR to be ready.

README.md

DanielGibson · 2026-01-05T00:36:35Z

Regarding the license, you can just add a note in the README like "The code changes of HeXen EOC have been released under GPLv2 or later (by $NAME). As the Doom 3 source code (that the dhewm3 SDK is based on) was released under GPLv3 or later, that's the effective license of this code."
(feel free to reword)

… releasing the mod under GPL

DanielGibson · 2026-01-05T22:39:02Z

idlib/containers/HashIndex.h

 ================
 */
 ID_INLINE void idHashIndex::SetGranularity( const int newGranularity ) {
+#if defined(_DEBUG) && 0


I find it a bit frightening how many assertions have been commented out - they usually were there for a reason..

Done in 83b0423. But the assertions still happen, needs to be debugged and corrected for some reasons

DanielGibson · 2026-01-05T23:57:07Z

game/Trigger.cpp

 	savefile->WriteBool( on );
 	savefile->WriteFloat( delay );
-	savefile->WriteInt( nextTime );
+	savefile->WriteInt( (int &) nextTime );


nextTime now is an idList<idDict> - that definitely shouldn't be saved as an int (same issue in Restore())

Fixed in e8e0e94, forgot to copy these pieces of code.

DanielGibson · 2026-01-05T23:58:10Z

game/Trigger.cpp

 	const char *damage;

-	if ( on && other && gameLocal.time >= nextTime ) {
+	if ( on && other && gameLocal.time >= (int &) nextTime ) {


(int &) nextTime doesn't make any sense, it's a list of dicts now - though maybe it should just be an int? but this code here is broken

Fixed in e8e0e94, forgot to copy these pieces of code.

…xtTime' variable

from the initial port at #32

DanielGibson · 2026-01-07T01:27:16Z

I started a fresh branch applying the original changes they made to the mod SDK and then
applied all your little fixes to get it to compile (but just those).
Also got the first level to start, getting rid of that assert( data ) error.
See https://github.com/dhewm/dhewm3-sdk/tree/eoc

It still doesn't work well though, after playing a bit I got assert( rotation.GetOrigin() == start );, backtrace

idClip::Motion() at Clip.cpp:1,209 0x7fffa502dbfb	
idPhysics_RigidBody::CheckForCollisions() at Physics_RigidBody.cpp:194 0x7fffa507c3cf	
idPhysics_RigidBody::Evaluate() at Physics_RigidBody.cpp:904 0x7fffa507fb54	
idEntity::RunPhysics() at Entity.cpp:2,693 0x7fffa4e7e2ee	
idDebris::Think() at Projectile.cpp:2,431 0x7fffa4f4c3ab	
idGameLocal::RunFrame() at Game_local.cpp:2,560 0x7fffa4ead202	
idSessionLocal::RunGameTic() at Session.cpp:2,904 0x5555556e0b05	
idSessionLocal::Frame() at Session.cpp:2,853 0x5555556e0804	
idCommonLocal::Frame() at Common.cpp:2,527 0x5555556776b7	
main() at main.cpp:452 0x555555810e0e

it seems like some of the values have NaNs, for example current.i.position. No idea yet why that is the case.

from the initial port at #32

DanielGibson · 2026-01-07T03:38:37Z

I managed to fix the aforementioned assertion, the NaNs were caused by uninitialized variables that the compiler thankfully warned about. Also fixed a few other compiler warnings.

It seems to work now 🎉

from the initial port at #32

DanielGibson · 2026-01-07T03:54:34Z

So please test https://github.com/dhewm/dhewm3-sdk/tree/eoc, ~~I'm keeping this PR open to discuss the port (bugs).~~

Here's a build for Windows: hexen-eoc-dhewm3-win32.zip

from the initial port at #32

DanielGibson · 2026-01-07T05:11:50Z

just pushed two more fixes so the second level (the swamp) can load

updated windows build: hexen-eoc-dhewm3-win32-upd.zip

DanielGibson · 2026-01-07T05:31:02Z

I changed my mind and created a (pseudo-) pull request for my branch after all.
Please discuss it there: #45

from the initial port at #32

LegendaryGuard and others added 10 commits July 23, 2023 21:34

Add modifications of the Damage functions and change some ammo variab…

926efcf

…le types into float in d3xp

Add part of modifications of Damage and TestMelee functions in d3xp: …

835ccde

…ai, gamesys and physics

Add modified source code in framework and game directory (part 1)

cdc61a1

Add 2 new files and modified player source code in game directory (pa…

e2d9b1d

…rt 2)

Add modified source code in game directory (part 3)

b6b8a04

Add modified source code in game directory (part 4)

0e0bdc0

Convert the new added files from CRLF into LF and add modified source…

b1176b9

… code in game directory (final part)

Add modified source code in idlib

f9ca75f

Add new source files in CMakeLists.txt

ef92e10

Fix some stuff when trying to compile in Linux, remove applied #inclu…

e29278f

…de precompile.h thingy

LegendaryGuard added 5 commits July 27, 2023 17:41

Fix some stuff

1e694cd

Fix more stuff

7b3a83a

Finally fix all errors, important: keep other classes in the correspo…

652fe79

…nding headers if you want to use them

Fix an error detected by Linux, &idEntity() can't be used. End of the…

3a03b7b

… fixes

Change the name of the compiled mod dll file

02eddc5

Clean up #include files in the code and disable some annoying asserti…

e1f6760

…ons using #ifdef _DEBUG && 0

LegendaryGuard force-pushed the hexeneoc branch from 9495995 to e1f6760 Compare July 30, 2023 21:54

LegendaryGuard force-pushed the hexeneoc branch from 3d3a5eb to c7bcf62 Compare July 31, 2023 12:33

Fix alternatively the crash of when player picks up an item, somethin…

e6b192d

…g is wrong with calling a script object in a function

LegendaryGuard force-pushed the hexeneoc branch from c7bcf62 to e6b192d Compare July 31, 2023 12:34

Disable other annoying assertion using #ifdef _DEBUG && 0

8928511

Change to README for HeXen: Edge Of Chaos

3ffc594

LegendaryGuard added 5 commits April 18, 2024 21:49

Merge branch 'master' into hexeneoc

682cd5d

Merge branch 'master' into hexeneoc

164283a

Fix newgranularity variable when using debug build

f924ef8

Fix idItem::GiveToPlayer in CallFunc function when picking up items l…

be7bac0

…ike ammo or health, that crashes on dhewm3, it works better with inv_carry only

Change and fix when compiling debug builds with asserts, now disabled…

c511633

… with '&& 0'

Add HEOC credits

cf7dd5f

LegendaryGuard force-pushed the hexeneoc branch from d2d618b to cf7dd5f Compare December 23, 2025 16:42

Fix idItem::GiveToPlayer again, this time with function checks

e790cb9

DanielGibson reviewed Jan 5, 2026

View reviewed changes

README.md Outdated Show resolved Hide resolved

Rewrite, add license notes and give thanks to the main HEOC coder for…

7dfacbc

… releasing the mod under GPL

DanielGibson reviewed Jan 5, 2026

View reviewed changes

LegendaryGuard added 3 commits January 6, 2026 23:11

Add the last pieces of code of game/Trigger.cpp from HEOC and fix 'ne…

e8e0e94

…xtTime' variable

Remove disabling macros in the assertions

83b0423

Update CMakeLists.txt

e8640db

DanielGibson added a commit that referenced this pull request Jan 7, 2026

Make it compile (on Linux) by merging lots of fixes from @legendguard

7f56610

from the initial port at #32

DanielGibson added a commit that referenced this pull request Jan 7, 2026

Make it compile (on Linux) by merging lots of fixes from @legendguard

97afe68

from the initial port at #32

DanielGibson added a commit that referenced this pull request Jan 7, 2026

Make it compile (on Linux) by merging lots of fixes from @LegendaryGuard

da8c225

from the initial port at #32

DanielGibson added a commit that referenced this pull request Jan 7, 2026

Make it compile (on Linux) by merging lots of fixes from @LegendaryGuard

47446cc

from the initial port at #32

DanielGibson mentioned this pull request Jan 7, 2026

Second attempt of porting HeXen: Edge Of Chaos #45

Draft

DanielGibson closed this Jan 7, 2026

DanielGibson added a commit that referenced this pull request Jan 7, 2026

Make it compile (on Linux) by merging lots of fixes from @LegendaryGuard

7ad8a00

from the initial port at #32

Port HeXen: Edge Of Chaos to dhewm3 #32

Port HeXen: Edge Of Chaos to dhewm3 #32

Uh oh!

Conversation

LegendaryGuard commented Jul 26, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

LegendaryGuard commented Jul 26, 2023

Uh oh!

DanielGibson commented Jul 26, 2023

Uh oh!

LegendaryGuard commented Jul 26, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

DanielGibson commented Jul 26, 2023

Uh oh!

LegendaryGuard commented Jul 27, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

LegendaryGuard commented Jul 28, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

LegendaryGuard commented Jul 30, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

LegendaryGuard commented Jul 31, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

LegendaryGuard commented Dec 16, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Uh oh!

DanielGibson commented Jan 5, 2026

Uh oh!

DanielGibson Jan 5, 2026

Choose a reason for hiding this comment

Uh oh!

LegendaryGuard Jan 6, 2026

Choose a reason for hiding this comment

Uh oh!

DanielGibson Jan 5, 2026

Choose a reason for hiding this comment

Uh oh!

LegendaryGuard Jan 6, 2026

Choose a reason for hiding this comment

Uh oh!

DanielGibson Jan 5, 2026

Choose a reason for hiding this comment

Uh oh!

LegendaryGuard Jan 6, 2026

Choose a reason for hiding this comment

Uh oh!

DanielGibson commented Jan 7, 2026

Uh oh!

DanielGibson commented Jan 7, 2026

Uh oh!

DanielGibson commented Jan 7, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

DanielGibson commented Jan 7, 2026

Uh oh!

DanielGibson commented Jan 7, 2026

Uh oh!

Reviewers

Assignees

Labels

Milestone

Development

Uh oh!

3 participants

LegendaryGuard commented Jul 26, 2023 •

edited

Loading

LegendaryGuard commented Jul 26, 2023 •

edited

Loading

LegendaryGuard commented Jul 27, 2023 •

edited

Loading

LegendaryGuard commented Jul 28, 2023 •

edited

Loading

LegendaryGuard commented Jul 30, 2023 •

edited

Loading

LegendaryGuard commented Jul 31, 2023 •

edited

Loading

LegendaryGuard commented Dec 16, 2025 •

edited

Loading

DanielGibson commented Jan 7, 2026 •

edited

Loading