[Highly Customized] Directional armor

CREDITS.md

@@ -408,6 +408,7 @@ This page lists all the individual contributions to the project by their author.
   - Exclusive SuperWeapon Sidebar
   - Fix the bug that AlphaImage remained after unit entered tunnel
   - Weapon target filtering by health percentage
+  - Directional armor
 - **Apollo** - Translucent SHP drawing patches
 - **ststl**:
   - Customizable `ShowTimer` priority of superweapons

docs/New-or-Enhanced-Logics.md

@@ -1861,6 +1861,38 @@ FireUp=                         ; integer
 FireUp.ResetInRetarget=true     ; boolean
 ```
 
+### 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

@@ -391,6 +391,7 @@ New:
 - [Turretless vehicles with `Voxel=no` support use `FireUp` like infantry](New-or-Enhanced-Logics.md#turretless-shape-vehicle-fireup) (by FlyStar)
 - Infantry support `IsGattling=yes` (by FlyStar)
 - [Several new Infotypes, no display in specific status and a new single frame display method](User-Interface.md#digital-display) (by CrimRecya)
+- Directional armor (by NetsuNegi)
 
 Vanilla fixes:
 - Fixed sidebar not updating queued unit numbers when adding or removing units when the production is on hold (by CrimRecya)

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

@@ -219,6 +219,13 @@ 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");
 
@@ -462,6 +469,12 @@ 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

@@ -176,6 +176,13 @@ class RulesExt
 		Valueable<double> DamageAlliesMultiplier;
 		Valueable<double> DamageEnemiesMultiplier;
 
+		Valueable<bool> DirectionalArmor;
+		Valueable<double> DirectionalArmor_FrontMultiplier;
+		Valueable<double> DirectionalArmor_SideMultiplier;
+		Valueable<double> DirectionalArmor_BackMultiplier;
+		Valueable<double> DirectionalArmor_FrontField;
+		Valueable<double> DirectionalArmor_BackField;
+
 		Valueable<double> AircraftLevelLightMultiplier;
 		Valueable<double> JumpjetLevelLightMultiplier;
 
@@ -358,6 +365,14 @@ 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

@@ -29,6 +29,7 @@ DEFINE_HOOK(0x701900, TechnoClass_ReceiveDamage_Shield, 0x6)
 	// Calculate Damage Multiplier
 	if (!args->IgnoreDefenses && *args->Damage)
 	{
+		const auto pTypeExt = pExt->TypeExtData;
 		double multiplier = 1.0;
 
 		if (!pSourceHouse || !pTargetHouse || !pSourceHouse->IsAlliedWith(pTargetHouse))
@@ -38,6 +39,21 @@ 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 && WarheadTypeExt::HitDirection >= 0 && args->DistanceToEpicenter <= 64)
+		{
+			const int tarFacing = pThis->PrimaryFacing.Current().GetValue<16>();
+			const int angle = abs(WarheadTypeExt::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

@@ -609,6 +609,13 @@ void TechnoTypeExt::ExtData::LoadFromINIFile(CCINIClass* const pINI)
 	this->KeepTargetOnMove_NoMorePursuit.Read(exINI, pSection, "KeepTargetOnMove.NoMorePursuit");
 	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->AllowAirstrike.Read(exINI, pSection, "AllowAirstrike");
@@ -1187,6 +1194,13 @@ void TechnoTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->KeepTargetOnMove_NoMorePursuit)
 		.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->AllowAirstrike)

src/Ext/TechnoType/Body.h

@@ -298,6 +298,13 @@ class TechnoTypeExt
 		Valueable<bool> KeepTargetOnMove_NoMorePursuit;
 		Valueable<Leptons> KeepTargetOnMove_ExtraDistance;
 
+		Nullable<bool> DirectionalArmor;
+		Nullable<double> DirectionalArmor_FrontMultiplier;
+		Nullable<double> DirectionalArmor_SideMultiplier;
+		Nullable<double> DirectionalArmor_BackMultiplier;
+		Nullable<double> DirectionalArmor_FrontField;
+		Nullable<double> DirectionalArmor_BackField;
+
 		Valueable<int> Power;
 
 		Nullable<bool> AllowAirstrike;
@@ -640,6 +647,13 @@ class TechnoTypeExt
 			, KeepTargetOnMove_NoMorePursuit { true }
 			, KeepTargetOnMove_ExtraDistance { Leptons(0) }
 
+			, DirectionalArmor {}
+			, DirectionalArmor_FrontMultiplier {}
+			, DirectionalArmor_SideMultiplier {}
+			, DirectionalArmor_BackMultiplier {}
+			, DirectionalArmor_FrontField {}
+			, DirectionalArmor_BackField {}
+
 			, Power { }
 
 			, AllowAirstrike { }

src/Ext/WarheadType/Body.cpp

@@ -214,6 +214,9 @@ 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");
@@ -460,6 +463,9 @@ 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)
 

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;
@@ -292,6 +295,9 @@ class WarheadTypeExt
 			, Shield_Respawn_Types {}
 			, Shield_SelfHealing_Types {}
 
+			, Directional { false}
+			, Directional_Multiplier { 1.0 }
+
 			, SpawnsCrate_Types {}
 			, SpawnsCrate_Weights {}
 
@@ -421,6 +427,8 @@ class WarheadTypeExt
 	};
 
 	static ExtContainer ExtMap;
+	static int HitDirection;
+
 	static bool LoadGlobals(PhobosStreamReader& Stm);
 	static bool SaveGlobals(PhobosStreamWriter& Stm);
 

src/Ext/WarheadType/Hooks.cpp

@@ -10,6 +10,7 @@
 #include <Utilities/EnumFunctions.h>
 
 #pragma region Detonation
+int WarheadTypeExt::HitDirection = -1;
 
 DEFINE_HOOK(0x46920B, BulletClass_Detonate, 0x6)
 {
@@ -21,12 +22,58 @@ 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)
+				{
+					WarheadTypeExt::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)
+				{
+					WarheadTypeExt::HitDirection = DirStruct((-1) * Math::atan2(pBullet->Velocity.Y, pBullet->Velocity.X)).GetValue<16>();
+					break;
+				}
+			}
+		}
+
+		WarheadTypeExt::HitDirection = -1;
+	}
+	while (false);
+
+	R->EAX(MapClass::Instance.DamageArea(*coords, damage, pSourceTechno, pWH, true, pSourceHouse));
+	WarheadTypeExt::HitDirection = -1;
+
+	return SkipGameCode;
+}
+
 DEFINE_HOOK(0x489286, MapClass_DamageArea, 0x6)
 {
 	GET_BASE(const WarheadTypeClass*, pWH, 0x0C);