Explode bouncing projectiles if hit damageable geometry

src/p_destructible.cpp

@@ -569,6 +569,8 @@ void P_GeometryRadiusAttack(AActor* bombspot, AActor* bombsource, int bombdamage
 		}
 
 		// check 3d floors
+		if (othersector)
+		{
 			for (auto f : othersector->e->XFloor.ffloors)
 			{
 				if (!(f->flags & FF_EXISTS)) continue;
@@ -588,6 +590,7 @@ void P_GeometryRadiusAttack(AActor* bombspot, AActor* bombsource, int bombdamage
 					grp = 0x20000000 | (f->model->sectornum & 0x0FFFFFFF);
 				PGRA_InsertIfCloser(damageGroupPos, grp, to3d_ffloor, bombspot->Pos(), srcsector, f->model, nullptr, SECPART_3D);
 			}
+		}
 
 	}
 
@@ -646,13 +649,17 @@ void P_GeometryRadiusAttack(AActor* bombspot, AActor* bombsource, int bombdamage
 // Called if P_ExplodeMissile was called against a wall.
 //==========================================================================
 
-void P_ProjectileHitLinedef(AActor* mo, line_t* line)
+bool P_ProjectileHitLinedef(AActor* mo, line_t* line)
 {
+	bool washit = false;
 	// detect 3d floor hit
 	if (mo->Blocking3DFloor)
 	{
 		if (mo->Blocking3DFloor->health3d > 0)
+		{
 			P_DamageSector(mo->Blocking3DFloor, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_3D, mo->Pos());
+			washit = true;
+		}
 	}
 
 	int wside = P_PointOnLineSide(mo->Pos(), line);
@@ -676,33 +683,59 @@ void P_ProjectileHitLinedef(AActor* mo, line_t* line)
 		if (zbottom < (otherfloorz + EQUAL_EPSILON) && othersector->healthfloor > 0 && P_CheckLinedefVulnerable(line, wside, SECPART_Floor))
 		{
 			P_DamageSector(othersector, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_Floor, mo->Pos());
+			washit = true;
 		}
 		if (ztop > (otherceilingz - EQUAL_EPSILON) && othersector->healthceiling > 0 && P_CheckLinedefVulnerable(line, wside, SECPART_Ceiling))
 		{
 			P_DamageSector(othersector, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_Ceiling, mo->Pos());
+			washit = true;
 		}
 	}
 
 	if (line->health > 0 && P_CheckLinedefVulnerable(line, wside))
 	{
 		P_DamageLinedef(line, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, wside, mo->Pos());
+		washit = true;
 	}
+
+	return washit;
 }
 
-void P_ProjectileHitPlane(AActor* mo, int part)
+// part = -1 means "detect from blocking"
+bool P_ProjectileHitPlane(AActor* mo, int part)
 {
+	if (part < 0)
+	{
+		if (mo->BlockingCeiling)
+			part = SECPART_Ceiling;
+		else if (mo->BlockingFloor)
+			part = SECPART_Floor;
+	}
+
 	// detect 3d floor hit
 	if (mo->Blocking3DFloor)
 	{
 		if (mo->Blocking3DFloor->health3d > 0)
+		{
 			P_DamageSector(mo->Blocking3DFloor, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_3D, mo->Pos());
-		return;
+			return true;
+		}
+		
+		return false;
 	}
 
 	if (part == SECPART_Floor && mo->Sector->healthfloor > 0 && P_CheckSectorVulnerable(mo->Sector, SECPART_Floor))
+	{
 		P_DamageSector(mo->Sector, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_Floor, mo->Pos());
+		return true;
+	}
 	else if (part == SECPART_Ceiling && mo->Sector->healthceiling > 0 && P_CheckSectorVulnerable(mo->Sector, SECPART_Ceiling))
+	{
 		P_DamageSector(mo->Sector, mo, mo->GetMissileDamage((mo->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1), mo->DamageType, SECPART_Ceiling, mo->Pos());
+		return true;
+	}
+
+	return false;
 }
 
 //==========================================================================

src/p_destructible.h

@@ -33,8 +33,8 @@ void P_DamageLinedef(line_t* line, AActor* source, int damage, FName damagetype,
 
 void P_GeometryLineAttack(FTraceResults& trace, AActor* thing, int damage, FName damageType);
 void P_GeometryRadiusAttack(AActor* bombspot, AActor* bombsource, int bombdamage, int bombdistance, FName damagetype, int fulldamagedistance);
-void P_ProjectileHitLinedef(AActor* projectile, line_t* line);
+bool P_ProjectileHitLinedef(AActor* projectile, line_t* line);
-void P_ProjectileHitPlane(AActor* projectile, int part);
+bool P_ProjectileHitPlane(AActor* projectile, int part);
 
 bool P_CheckLinedefVulnerable(line_t* line, int side, int part = -1);
 bool P_CheckSectorVulnerable(sector_t* sector, int part);

src/p_map.cpp

@@ -3561,6 +3561,18 @@ bool FSlide::BounceWall(AActor *mo)
 		return true;
 	}
 
+	// [ZZ] if bouncing missile hits a damageable linedef, it dies
+	if (P_ProjectileHitLinedef(mo, line) && mo->bouncecount > 0)
+	{
+		mo->Vel.Zero();
+		mo->Speed = 0;
+		mo->bouncecount = 0;
+		if (mo->flags & MF_MISSILE)
+			P_ExplodeMissile(mo, line, nullptr);
+		else mo->CallDie(nullptr, nullptr);
+		return true;
+	}
+
 	// The amount of bounces is limited
 	if (mo->bouncecount>0 && --mo->bouncecount == 0)
 	{

src/p_mobj.cpp

@@ -2141,6 +2141,18 @@ void AActor::PlayBounceSound(bool onfloor)
 
 bool AActor::FloorBounceMissile (secplane_t &plane)
 {
+	// [ZZ] if bouncing missile hits a damageable sector(plane), it dies
+	if (P_ProjectileHitPlane(this, -1) && bouncecount > 0)
+	{
+		Vel.Zero();
+		Speed = 0;
+		bouncecount = 0;
+		if (flags & MF_MISSILE)
+			P_ExplodeMissile(this, nullptr, nullptr);
+		else CallDie(nullptr, nullptr);
+		return true;
+	}
+
 	if (Z() <= floorz && P_HitFloor (this))
 	{
 		// Landed in some sort of liquid