Add WorldRailgunPreFired for railgun attacks

Add AttackLineFlags for WorldHitscanPreFired

Indentation fixes in event.zs

src/events.cpp

@@ -719,6 +719,27 @@ bool EventManager::WorldHitscanPreFired(AActor* actor, DAngle angle, double dist
 	return ret;
 }
 
+bool EventManager::WorldRailgunPreFired(FName damageType, PClassActor* pufftype, FRailParams* param)
+{
+	auto actor = param->source;
+
+	// don't call anything if actor was destroyed on PostBeginPlay/BeginPlay/whatever.
+	if (actor->ObjectFlags & OF_EuthanizeMe)
+		return false;
+
+	bool ret = false;
+
+	if (ShouldCallStatic(true)) ret = staticEventManager.WorldRailgunPreFired(damageType, pufftype, param);
+
+	if (!ret)
+	{
+		for (DStaticEventHandler* handler = FirstEventHandler; handler && ret == false; handler = handler->next)
+			ret = handler->WorldRailgunPreFired(damageType, pufftype, param);
+	}
+
+	return ret;
+}
+
 void EventManager::WorldHitscanFired(AActor* actor, const DVector3& AttackPos, const DVector3& DamagePosition, AActor* Inflictor, int flags)
 {
 	// don't call anything if actor was destroyed on PostBeginPlay/BeginPlay/whatever.
@@ -1064,6 +1085,8 @@ DEFINE_FIELD_X(WorldEvent, FWorldEvent, AttackOffsetForward);
 DEFINE_FIELD_X(WorldEvent, FWorldEvent, AttackOffsetSide);
 DEFINE_FIELD_X(WorldEvent, FWorldEvent, AttackZ);
 DEFINE_FIELD_X(WorldEvent, FWorldEvent, AttackPuffType);
+DEFINE_FIELD_X(WorldEvent, FWorldEvent, RailParams);
+DEFINE_FIELD_X(WorldEvent, FWorldEvent, AttackLineFlags);
 
 DEFINE_FIELD_X(PlayerEvent, FPlayerEvent, PlayerNumber);
 DEFINE_FIELD_X(PlayerEvent, FPlayerEvent, IsReturn);
@@ -1784,7 +1807,37 @@ bool DStaticEventHandler::WorldHitscanPreFired(AActor* actor, DAngle angle, doub
 		e.AttackOffsetForward = offsetforward;
 		e.AttackOffsetSide = offsetside;
 		e.AttackZ = sz;
-		e.DamageFlags = flags;
+		e.AttackLineFlags = flags;
+		int processed;
+		VMReturn results[1] = { &processed };
+		VMValue params[2] = { (DStaticEventHandler*)this, &e };
+		VMCall(func, params, 2, results, 1);
+		return !!processed;
+	}
+
+	return false;
+}
+
+bool DStaticEventHandler::WorldRailgunPreFired(FName damageType, PClassActor* pufftype, FRailParams* param)
+{
+	IFVIRTUAL(DStaticEventHandler, WorldRailgunPreFired)
+	{
+		// don't create excessive DObjects if not going to be processed anyway
+		if (isEmpty(func)) return false;
+		FWorldEvent e = owner->SetupWorldEvent();
+		e.Thing = param->source;
+		e.AttackPuffType = pufftype;
+		e.DamageType = damageType;
+		e.Damage = param->damage;
+		e.AttackOffsetForward = 0;
+		e.AttackOffsetSide = param->offset_xy;
+		e.AttackDistance = param->distance;
+		e.AttackZ = param->offset_z;
+		e.AttackAngle = e.Thing->Angles.Yaw + param->angleoffset;
+		e.AttackPitch = e.Thing->Angles.Pitch + param->pitchoffset;
+		e.RailParams = *param;
+		e.RailParams.puff = pufftype;
+
 		int processed;
 		VMReturn results[1] = { &processed };
 		VMValue params[2] = { (DStaticEventHandler*)this, &e };
@@ -1806,7 +1859,7 @@ void DStaticEventHandler::WorldHitscanFired(AActor* actor, const DVector3& Attac
 		e.AttackPos = AttackPos;
 		e.DamagePosition = DamagePosition;
 		e.Inflictor = Inflictor;
-		e.DamageFlags = flags;
+		e.AttackLineFlags = flags;
 		VMValue params[2] = { (DStaticEventHandler*)this, &e };
 		VMCall(func, params, 2, nullptr, 0);
 	}

src/events.h

@@ -4,6 +4,7 @@
 #include "dobject.h"
 #include "serializer.h"
 #include "d_event.h"
+#include "p_local.h"
 #include "sbar.h"
 #include "info.h"
 #include "vm.h"
@@ -312,6 +313,7 @@ public:
 	void WorldThingDamaged(AActor* actor, AActor* inflictor, AActor* source, int damage, FName mod, int flags, DAngle angle);
 	void WorldThingDestroyed(AActor* actor);
 	bool WorldHitscanPreFired(AActor* actor, DAngle angle, double distance, DAngle pitch, int damage, FName damageType, PClassActor *pufftype, int flags, double sz, double offsetforward, double offsetside);
+	bool WorldRailgunPreFired(FName damageType, PClassActor* pufftype, FRailParams* param);
 	void WorldHitscanFired(AActor* actor, const DVector3& AttackPos, const DVector3& DamagePosition, AActor* Inflictor, int flags);
 	void WorldLinePreActivated(line_t* line, AActor* actor, int activationType, bool* shouldactivate);
 	void WorldLineActivated(line_t* line, AActor* actor, int activationType);
@@ -403,6 +405,8 @@ struct FWorldEvent
 	double AttackOffsetSide = 0;
 	double AttackZ = 0;
 	PClassActor* AttackPuffType = nullptr;
+	FRailParams RailParams;
+	int AttackLineFlags = 0;
 };
 
 struct FPlayerEvent
@@ -481,6 +485,8 @@ struct EventManager
 	bool WorldHitscanPreFired(AActor* actor, DAngle angle, double distance, DAngle pitch, int damage, FName damageType, PClassActor *pufftype, int flags, double sz, double offsetforward, double offsetside);
 	// called when a hitscan attack has been fired
 	void WorldHitscanFired(AActor* actor, const DVector3& AttackPos, const DVector3& DamagePosition, AActor* Inflictor, int flags);
+	// called when a railgun attack has been fired (can be overridden to block it)
+	bool WorldRailgunPreFired(FName damageType, PClassActor* pufftype, FRailParams* param);
 	// called inside AActor::Grind just before the corpse is destroyed
 	void WorldThingGround(AActor* actor, FState* st);
 	// called after AActor::Revive.

src/playsim/p_map.cpp

@@ -5416,7 +5416,7 @@ void P_RailAttack(FRailParams *p)
 	// disabled because not complete yet.
 	flags = (puffDefaults->flags6 & MF6_NOTRIGGER) ? TRACE_ReportPortals : TRACE_PCross | TRACE_Impact | TRACE_ReportPortals;
 
-	if (source->Level->localEventManager->WorldHitscanPreFired(source, source->Angles.Yaw + p->angleoffset, p->distance, source->Angles.Pitch + p->pitchoffset, p->damage, damagetype, puffclass, flags, p->offset_z, 0, p->offset_xy))
+	if (source->Level->localEventManager->WorldRailgunPreFired(damagetype, puffclass, p))
 	{
 		return;
 	}

wadsrc/static/zscript/events.zs

@@ -97,6 +97,7 @@ struct WorldEvent native play version("2.4")
     native readonly bool DamageIsRadius;
     native int NewDamage;
     native readonly State CrushedState;
+    native readonly int AttackLineFlags;
     native readonly double AttackAngle;
     native readonly double AttackPitch;
     native readonly double AttackDistance;
@@ -105,6 +106,7 @@ struct WorldEvent native play version("2.4")
     native readonly double AttackOffsetSide;
     native readonly double AttackZ;
     native readonly class<Actor> AttackPuffType;
+    native readonly FRailParams RailParams;
 }
 
 struct PlayerEvent native play version("2.4")
@@ -164,6 +166,7 @@ class StaticEventHandler : Object native play version("2.4")
     virtual void WorldThingDamaged(WorldEvent e) {}
     virtual void WorldThingDestroyed(WorldEvent e) {}
     virtual bool WorldHitscanPreFired(WorldEvent e) { return false; }
+    virtual bool WorldRailgunPreFired(WorldEvent e) { return false; }
     virtual void WorldHitscanFired(WorldEvent e) {}
     virtual void WorldLinePreActivated(WorldEvent e) {}
     virtual void WorldLineActivated(WorldEvent e) {}