Tweaks: add NWNX_TWEAKS_CON_DOES_NOT_AFFECT_HP

CHANGELOG.md

@@ -10,6 +10,7 @@ https://github.com/nwnxee/unified/compare/build8193.37.13...HEAD
 ### Added
 - Tweaks: added `NWNX_TWEAKS_RESIST_ENERGY_STACKS_WITH_EPIC_ENERGY_RESISTANCE` to make Resist Energy feats stack with Epic Energy Resistance.
 - Tweaks: added `NWNX_TWEAKS_UNHARDCODE_SPECIAL_ABILITY_TARGET_TYPE` to allow special abilities to be used on target types other than creatures.
+- Tweaks: added `NWNX_TWEAKS_CON_DOES_NOT_AFFECT_HP` to prevent constitution from affecting creature HP.
 
 ##### New Plugins
 - N/A

Plugins/Tweaks/CMakeLists.txt

@@ -40,4 +40,5 @@ add_plugin(Tweaks
     "CutsceneModeNoTURD.cpp"
     "CanUseItemsWhilePolymorphed.cpp"
     "ResistEnergyStacksWithEpicEnergyResistance.cpp"
-    "UnhardcodeSpecialAbilityTargetType.cpp")
+    "UnhardcodeSpecialAbilityTargetType.cpp"
+    "ConDoesNotAffectHP.cpp")

Plugins/Tweaks/ConDoesNotAffectHP.cpp

@@ -0,0 +1,28 @@
+#include "nwnx.hpp"
+
+#include "API/CNWSCreature.hpp"
+
+namespace Tweaks {
+
+using namespace NWNXLib;
+using namespace NWNXLib::API;
+
+void ConDoesNotAffectHP() __attribute__((constructor));
+void ConDoesNotAffectHP()
+{
+    if (!Config::Get<bool>("CON_DOES_NOT_AFFECT_HP", false)) return;
+
+    LOG_INFO("Constitution does not affect creature HP.");
+
+    static Hooks::Hook s_CNWSCreatureGetMaxHitPointsHook = Hooks::HookFunction(
+        Functions::_ZN12CNWSCreature15GetMaxHitPointsEi,
+        +[](CNWSCreature *pThis, BOOL bIncludeToughness) -> int16_t
+        {
+            int16_t maxHP = s_CNWSCreatureGetMaxHitPointsHook->CallOriginal<int16_t>(pThis, bIncludeToughness);
+
+            return maxHP - pThis->m_pStats->GetLevel() * pThis->m_pStats->m_nConstitutionModifier;
+        },
+        Hooks::Order::Late);
+}
+
+}

Plugins/Tweaks/README.md

@@ -52,6 +52,7 @@ Tweaks stuff. See below.
 | `NWNX_TWEAKS_CAN_USE_ITEMS_WHILE_POLYMORPHED` | true or false | Allow all items to be used while polymorphed. |
 | `NWNX_TWEAKS_RESIST_ENERGY_STACKS_WITH_EPIC_ENERGY_RESISTANCE` | true or false | Resist Energy feats stack with Epic Energy Resistance. |
 | `NWNX_TWEAKS_UNHARDCODE_SPECIAL_ABILITY_TARGET_TYPE` | true or false | Allows special abilities to be used on target types other than creatures. |
+| `NWNX_TWEAKS_CON_DOES_NOT_AFFECT_HP` | true or false | Constitution does not affect creature HP. |
 
 ## Environment variable values