[Highly Customized] Directional armor

CREDITS.md

@@ -372,6 +372,7 @@ This page lists all the individual contributions to the project by their author.
   - Enhanced reveal & gap warhead
   - Fix an issue that teleport units board transport vehicles on the bridge will create an impassable invisible barrier, which may cause the game to freeze or even crash
   - Fix wrong shadow when a vehicle has hover locomotor and is being lifted by `IsLocomotor=yes` warhead
+  - Directional armor
 - **Apollo** - Translucent SHP drawing patches
 - **ststl**:
    - Customizable `ShowTimer` priority of superweapons

docs/New-or-Enhanced-Logics.md

@@ -1764,6 +1764,38 @@ JumpjetTilt.SidewaysRotationFactor=1.0  ; floating point value
 JumpjetTilt.SidewaysSpeedFactor=1.0     ; floating point value
 ```
 
+### Directional armor
+
+- The damage suffered by the vehicle can now be affected by the hit direction.
+- The front and rear judgment ranges are always symmetrical. A front angle of 0.5 indicates that the front direction is the axis, and the 45 degree angle range on both sides belongs to the front judgment range.
+A front angle of 1.0 indicates that the 90 degree angle range on both sides belongs to the front judgment range;
+- The lateral range refers to the remaining angle range after excluding the front and back sides.
+- The warhead needs to have `Directional=true` to enable this effect.
+- `Directional.Multiplier` is an additional multiplier used to control the intensity of the effect.
+
+In `rulesmd.ini`
+```ini
+[CombatDamage]
+DirectionalArmor=false                     ; boolean
+DirectionalArmor.FrontMultiplier=1.0   ; float
+DirectionalArmor.SideMultiplier=1.0    ; float
+DirectionalArmor.BackMultiplier=1.0    ; float
+DirectionalArmor.FrontField=0.5        ; float
+DirectionalArmor.BackField=0.5         ; float
+
+[SOMEVEHICLE]                          ; VehicleType
+DirectionalArmor=                      ; boolean
+DirectionalArmor.FrontMultiplier=      ; float
+DirectionalArmor.SideMultiplier=       ; float
+DirectionalArmor.BackMultiplier=       ; float
+DirectionalArmor.FrontField=           ; float
+DirectionalArmor.BackField=            ; float
+
+[SOMEWARHEAD]
+Directional=false                      ; boolean
+Directional.Multiplier=1.0             ; float
+```
+
 ## Warheads
 
 ```{hint}

docs/Whats-New.md

@@ -359,6 +359,7 @@ New:
 - Jumpjet Tilts While Moving (by CrimRecya)
 - [Spawned aircraft facing to match turret toggle](New-or-Enhanced-Logics.md#aircraft-spawner-customizations) (by Starkku)
 - Removed dependency on `blowfish.dll` (by ZivDero)
+- Directional armor (by NetsuNegi)
 
 Vanilla fixes:
 - Prevent the units with locomotors that cause problems from entering the tank bunker (by TaranDahl)

src/Ext/Bullet/Trajectories/PhobosTrajectory.cpp

@@ -1,6 +1,7 @@
 #include <Ext/BulletType/Body.h>
 #include <Ext/Bullet/Body.h>
 #include <Ext/WeaponType/Body.h>
+#include <Ext/WarheadType/Body.h>
 
 #include <BulletClass.h>
 #include <Helpers/Macro.h>

src/Ext/Rules/Body.cpp

@@ -204,6 +204,13 @@ void RulesExt::ExtData::LoadBeforeTypeData(RulesClass* pThis, CCINIClass* pINI)
 	this->DamageAlliesMultiplier.Read(exINI, GameStrings::CombatDamage, "DamageAlliesMultiplier");
 	this->DamageEnemiesMultiplier.Read(exINI, GameStrings::CombatDamage, "DamageEnemiesMultiplier");
 
+	this->DirectionalArmor.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor");
+	this->DirectionalArmor_FrontMultiplier.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor.FrontMultiplier");
+	this->DirectionalArmor_SideMultiplier.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor.SideMultiplier");
+	this->DirectionalArmor_BackMultiplier.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor.BackMultiplier");
+	this->DirectionalArmor_FrontField.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor.FrontField");
+	this->DirectionalArmor_BackField.Read(exINI, GameStrings::CombatDamage, "DirectionalArmor.BackField");
+
 	this->AircraftLevelLightMultiplier.Read(exINI, GameStrings::AudioVisual, "AircraftLevelLightMultiplier");
 	this->JumpjetLevelLightMultiplier.Read(exINI, GameStrings::AudioVisual, "JumpjetLevelLightMultiplier");
 
@@ -429,6 +436,12 @@ void RulesExt::ExtData::Serialize(T& Stm)
 		.Process(this->DamageOwnerMultiplier)
 		.Process(this->DamageAlliesMultiplier)
 		.Process(this->DamageEnemiesMultiplier)
+		.Process(this->DirectionalArmor)
+		.Process(this->DirectionalArmor_FrontMultiplier)
+		.Process(this->DirectionalArmor_SideMultiplier)
+		.Process(this->DirectionalArmor_BackMultiplier)
+		.Process(this->DirectionalArmor_FrontField)
+		.Process(this->DirectionalArmor_BackField)
 		.Process(this->AircraftLevelLightMultiplier)
 		.Process(this->JumpjetLevelLightMultiplier)
 		.Process(this->VoxelLightSource)

src/Ext/Rules/Body.h

@@ -162,6 +162,13 @@ class RulesExt
 		Valueable<double> DamageAlliesMultiplier;
 		Valueable<double> DamageEnemiesMultiplier;
 
+		Valueable<bool> DirectionalArmor;
+		Valueable<float> DirectionalArmor_FrontMultiplier;
+		Valueable<float> DirectionalArmor_SideMultiplier;
+		Valueable<float> DirectionalArmor_BackMultiplier;
+		Valueable<float> DirectionalArmor_FrontField;
+		Valueable<float> DirectionalArmor_BackField;
+
 		Valueable<double> AircraftLevelLightMultiplier;
 		Valueable<double> JumpjetLevelLightMultiplier;
 
@@ -325,6 +332,14 @@ class RulesExt
 			, DamageOwnerMultiplier { 1.0 }
 			, DamageAlliesMultiplier { 1.0 }
 			, DamageEnemiesMultiplier { 1.0 }
+
+			, DirectionalArmor { false }
+			, DirectionalArmor_FrontMultiplier { 1.0 }
+			, DirectionalArmor_SideMultiplier { 1.0 }
+			, DirectionalArmor_BackMultiplier { 1.0 }
+			, DirectionalArmor_FrontField { 0.5 }
+			, DirectionalArmor_BackField { 0.5 }
+
 			, AircraftLevelLightMultiplier { 1.0 }
 			, JumpjetLevelLightMultiplier { 0.0 }
 			, VoxelLightSource { }

src/Ext/Techno/Hooks.ReceiveDamage.cpp

@@ -40,6 +40,21 @@ DEFINE_HOOK(0x701900, TechnoClass_ReceiveDamage_Shield, 0x6)
 		else
 			multiplier = pWHExt->DamageOwnerMultiplier.Get(pRules->DamageOwnerMultiplier);
 
+		if (pTypeExt->DirectionalArmor.Get(RulesExt::Global()->DirectionalArmor) && pThis->WhatAmI() == AbstractType::Unit && pWHExt->HitDirection >= 0 && args->DistanceToEpicenter <= 64)
+		{
+			const int tarFacing = pThis->PrimaryFacing.Current().GetValue<16>();
+			const int angle = abs(pWHExt->HitDirection - tarFacing);
+			const int frontField = static_cast<int>(16384 * pTypeExt->DirectionalArmor_FrontField.Get(RulesExt::Global()->DirectionalArmor_FrontField));
+			const int backField = static_cast<int>(16384 * pTypeExt->DirectionalArmor_BackField.Get(RulesExt::Global()->DirectionalArmor_BackField));
+
+			if (angle >= 32768 - frontField && angle <= 32768 + frontField)
+				multiplier *= pTypeExt->DirectionalArmor_FrontMultiplier.Get(RulesExt::Global()->DirectionalArmor_FrontMultiplier) * pWHExt->Directional_Multiplier;
+			else if ((angle < backField && angle >= 0) || (angle > 49152 + backField && angle <= 65536))
+				multiplier *= pTypeExt->DirectionalArmor_BackMultiplier.Get(RulesExt::Global()->DirectionalArmor_BackMultiplier) * pWHExt->Directional_Multiplier;
+			else
+				multiplier *= pTypeExt->DirectionalArmor_SideMultiplier.Get(RulesExt::Global()->DirectionalArmor_SideMultiplier) * pWHExt->Directional_Multiplier;
+		}
+
 		if (multiplier != 1.0)
 		{
 			const auto sgnDamage = *args->Damage > 0 ? 1 : -1;

src/Ext/TechnoType/Body.cpp

@@ -498,6 +498,13 @@ void TechnoTypeExt::ExtData::LoadFromINIFile(CCINIClass* const pINI)
 	this->KeepTargetOnMove.Read(exINI, pSection, "KeepTargetOnMove");
 	this->KeepTargetOnMove_ExtraDistance.Read(exINI, pSection, "KeepTargetOnMove.ExtraDistance");
 
+	this->DirectionalArmor.Read(exINI, pSection, "DirectionalArmor");
+	this->DirectionalArmor_FrontMultiplier.Read(exINI, pSection, "DirectionalArmor.FrontMultiplier");
+	this->DirectionalArmor_SideMultiplier.Read(exINI, pSection, "DirectionalArmor.SideMultiplier");
+	this->DirectionalArmor_BackMultiplier.Read(exINI, pSection, "DirectionalArmor.BackMultiplier");
+	this->DirectionalArmor_FrontField.Read(exINI, pSection, "DirectionalArmor.FrontField");
+	this->DirectionalArmor_BackField.Read(exINI, pSection, "DirectionalArmor.BackField");
+
 	this->Power.Read(exINI, pSection, "Power");
 
 	this->Image_ConditionYellow.Read(exINI, pSection, "Image.ConditionYellow");
@@ -943,6 +950,13 @@ void TechnoTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->KeepTargetOnMove)
 		.Process(this->KeepTargetOnMove_ExtraDistance)
 
+		.Process(this->DirectionalArmor)
+		.Process(this->DirectionalArmor_FrontMultiplier)
+		.Process(this->DirectionalArmor_SideMultiplier)
+		.Process(this->DirectionalArmor_BackMultiplier)
+		.Process(this->DirectionalArmor_FrontField)
+		.Process(this->DirectionalArmor_BackField)
+
 		.Process(this->Power)
 
 		.Process(this->Image_ConditionYellow)

src/Ext/TechnoType/Body.h

@@ -273,6 +273,13 @@ class TechnoTypeExt
 		Valueable<bool> KeepTargetOnMove;
 		Valueable<Leptons> KeepTargetOnMove_ExtraDistance;
 
+		Nullable<bool> DirectionalArmor;
+		Nullable<float> DirectionalArmor_FrontMultiplier;
+		Nullable<float> DirectionalArmor_SideMultiplier;
+		Nullable<float> DirectionalArmor_BackMultiplier;
+		Nullable<float> DirectionalArmor_FrontField;
+		Nullable<float> DirectionalArmor_BackField;
+
 		Valueable<int> Power;
 
     	Nullable<UnitTypeClass*> Image_ConditionYellow;
@@ -568,6 +575,13 @@ class TechnoTypeExt
 			, KeepTargetOnMove { false }
 			, KeepTargetOnMove_ExtraDistance { Leptons(0) }
 
+			, DirectionalArmor {}
+			, DirectionalArmor_FrontMultiplier {}
+			, DirectionalArmor_SideMultiplier {}
+			, DirectionalArmor_BackMultiplier {}
+			, DirectionalArmor_FrontField {}
+			, DirectionalArmor_BackField {}
+
 			, Power { }
 
       		, Image_ConditionYellow { }

src/Ext/WarheadType/Body.cpp

@@ -235,6 +235,9 @@ void WarheadTypeExt::ExtData::LoadFromINIFile(CCINIClass* const pINI)
 	this->Shield_Respawn_Types.Read(exINI, pSection, "Shield.Respawn.Types");
 	this->Shield_SelfHealing_Types.Read(exINI, pSection, "Shield.SelfHealing.Types");
 
+	this->Directional.Read(exINI, pSection, "Directional");
+	this->Directional_Multiplier.Read(exINI, pSection, "Directional.Multiplier");
+
 	this->NotHuman_DeathSequence.Read(exINI, pSection, "NotHuman.DeathSequence");
 	this->LaunchSW.Read(exINI, pSection, "LaunchSW");
 	this->LaunchSW_RealLaunch.Read(exINI, pSection, "LaunchSW.RealLaunch");
@@ -474,6 +477,9 @@ void WarheadTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->Shield_Respawn_Types)
 		.Process(this->Shield_SelfHealing_Types)
 
+		.Process(this->Directional)
+		.Process(this->Directional_Multiplier)
+
 		.Process(this->SpawnsCrate_Types)
 		.Process(this->SpawnsCrate_Weights)
 
@@ -547,6 +553,7 @@ void WarheadTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->PossibleCellSpreadDetonate)
 		.Process(this->Reflected)
 		.Process(this->DamageAreaTarget)
+		.Process(this->HitDirection)
 		;
 }
 

src/Ext/WarheadType/Body.h

@@ -113,6 +113,9 @@ class WarheadTypeExt
 		NullableVector<ShieldTypeClass*> Shield_Respawn_Types;
 		NullableVector<ShieldTypeClass*> Shield_SelfHealing_Types;
 
+		Valueable<bool> Directional;
+		Valueable<double> Directional_Multiplier;
+
 		Valueable<int> NotHuman_DeathSequence;
 		ValueableIdxVector<SuperWeaponTypeClass> LaunchSW;
 		Valueable<bool> LaunchSW_RealLaunch;
@@ -189,6 +192,7 @@ class WarheadTypeExt
 		int RemainingAnimCreationInterval;
 		bool PossibleCellSpreadDetonate;
 		TechnoClass* DamageAreaTarget;
+		int HitDirection;
 
 	private:
 		Valueable<double> Shield_Respawn_Rate_InMinutes;
@@ -285,6 +289,9 @@ class WarheadTypeExt
 			, Shield_Respawn_Types {}
 			, Shield_SelfHealing_Types {}
 
+			, Directional { false}
+			, Directional_Multiplier { 1.0 }
+
 			, SpawnsCrate_Types {}
 			, SpawnsCrate_Weights {}
 
@@ -355,6 +362,7 @@ class WarheadTypeExt
 			, RemainingAnimCreationInterval { 0 }
 			, PossibleCellSpreadDetonate { false }
 			, DamageAreaTarget {}
+			, HitDirection { -1 }
 
 			, KillWeapon {}
 			, KillWeapon_OnFirer {}

src/Ext/WarheadType/Hooks.cpp

@@ -21,12 +21,58 @@ DEFINE_HOOK(0x46920B, BulletClass_Detonate, 0x6)
 	auto const pOwner = pBullet->Owner;
 	auto const pHouse = pOwner ? pOwner->Owner : nullptr;
 	auto const pDecidedHouse = pHouse ? pHouse : pBulletExt->FirerHouse;
+
 	pWHExt->Detonate(pOwner, pDecidedHouse, pBulletExt, *pCoords);
 	pWHExt->InDamageArea = false;
 
 	return 0;
 }
 
+DEFINE_HOOK(0x469A69, BulletClass_Detonate_DamageArea, 0x6)
+{
+	enum { SkipGameCode = 0x469A88 };
+
+	GET(BulletClass*, pBullet, ESI);
+	GET(TechnoClass*, pSourceTechno, EAX);
+	GET(int, damage, EDX);
+	GET_BASE(CoordStruct*, coords, 0x8);
+	const auto pBulletExt = BulletExt::ExtMap.Find(pBullet);
+	const auto pSourceHouse = pSourceTechno ? pSourceTechno->Owner : pBulletExt->FirerHouse;
+	const auto pWH = pBullet->WH;
+	const auto pWHExt = WarheadTypeExt::ExtMap.Find(pWH);
+
+	do
+	{
+		if (pWHExt->Directional)
+		{
+			if (pBullet->Type->Inviso)
+			{
+				if (pBullet->SourceCoords.X != pBullet->TargetCoords.X || pBullet->SourceCoords.Y != pBullet->TargetCoords.Y)
+				{
+					pWHExt->HitDirection = DirStruct(Math::atan2(static_cast<double>(pBullet->SourceCoords.Y - pBullet->TargetCoords.Y), static_cast<double>(pBullet->TargetCoords.X - pBullet->SourceCoords.X))).GetValue<16>();
+					break;
+				}
+			}
+			else
+			{
+				if (pBullet->Velocity.X != 0.0 || pBullet->Velocity.Y != 0.0)
+				{
+					pWHExt->HitDirection = DirStruct((-1) * Math::atan2(pBullet->Velocity.Y, pBullet->Velocity.X)).GetValue<16>();
+					break;
+				}
+			}
+		}
+
+		pWHExt->HitDirection = -1;
+	}
+	while (false);
+
+	R->EAX(MapClass::Instance.DamageArea(*coords, damage, pSourceTechno, pWH, true, pSourceHouse));
+	pWHExt->HitDirection = -1;
+
+	return SkipGameCode;
+}
+
 DEFINE_HOOK(0x489286, MapClass_DamageArea, 0x6)
 {
 	GET_BASE(const WarheadTypeClass*, pWH, 0x0C);