Moved all the handling of MF_SHADOW for attacks into its' own file.

Also changed all the individual flag checks into one generic inline function.

src/playsim/p_actionfunctions.cpp

@@ -70,20 +70,21 @@
 #include "actorinlines.h"
 #include "types.h"
 #include "model.h"
+#include "shadowinlines.h"
 
 static FRandom pr_camissile ("CustomActorfire");
 static FRandom pr_cabullet ("CustomBullet");
 static FRandom pr_cwjump ("CustomWpJump");
 static FRandom pr_cwpunch ("CustomWpPunch");
 static FRandom pr_grenade ("ThrowGrenade");
-static FRandom pr_crailgun ("CustomRailgun");
+	   FRandom pr_crailgun ("CustomRailgun");
 static FRandom pr_spawndebris ("SpawnDebris");
 static FRandom pr_spawnitemex ("SpawnItemEx");
 static FRandom pr_burst ("Burst");
 static FRandom pr_monsterrefire ("MonsterRefire");
 static FRandom pr_teleport("A_Teleport");
 static FRandom pr_bfgselfdamage("BFGSelfDamage");
-FRandom pr_cajump("CustomJump");
+	   FRandom pr_cajump("CustomJump");
 
 //==========================================================================
 //
@@ -1226,11 +1227,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CustomRailgun)
 			self->Angles.Yaw = self->AngleTo(self->target,- self->target->Vel.X * veleffect, -self->target->Vel.Y * veleffect);
 		}
 
-		if (self->target->flags & MF_SHADOW)
-		{
-			DAngle rnd = DAngle::fromDeg(pr_crailgun.Random2() * (45. / 256.));
-			self->Angles.Yaw += rnd;
-		}
+		A_CustomRailgun_ShadowHandling(self);
 	}
 
 	if (!(flags & CRF_EXPLICITANGLE))
@@ -3529,7 +3526,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WolfAttack)
 	hitchance -= idist * (dodge ? 16 : 8);
 
 	// While we're here, we may as well do something for this:
-	if (self->target->flags & MF_SHADOW)
+	if (A_WolfAttack_ShadowHandling(self))
 	{
 		hitchance >>= 2;
 	}

src/playsim/p_enemy.cpp

@@ -50,6 +50,7 @@
 #include "vm.h"
 #include "actorinlines.h"
 #include "a_ceiling.h"
+#include "shadowinlines.h"
 
 #include "gi.h"
 
@@ -3021,12 +3022,7 @@ void A_Face(AActor *self, AActor *other, DAngle max_turn, DAngle max_pitch, DAng
 	}
 	
 
-
-	// This will never work well if the turn angle is limited.
-	if (max_turn == nullAngle && (self->Angles.Yaw == other_angle) && other->flags & MF_SHADOW && !(self->flags6 & MF6_SEEINVISIBLE) )
-    {
-		self->Angles.Yaw += DAngle::fromDeg(pr_facetarget.Random2() * (45 / 256.));
-    }
+	A_Face_ShadowHandling(self,other,max_turn,other_angle);
 }
 
 void A_FaceTarget(AActor *self)
@@ -3073,10 +3069,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MonsterRail)
 	// Let the aim trail behind the player
 	self->Angles.Yaw = self->AngleTo(self->target, -self->target->Vel.X * 3, -self->target->Vel.Y * 3);
 
-	if (self->target->flags & MF_SHADOW && !(self->flags6 & MF6_SEEINVISIBLE))
-	{
-		self->Angles.Yaw += DAngle::fromDeg(pr_railface.Random2() * 45./256);
-	}
+	A_MonsterRail_ShadowHandling(self);
 
 	FRailParams p;
 

src/playsim/p_mobj.cpp

@@ -99,6 +99,7 @@
 #include "actorinlines.h"
 #include "a_dynlight.h"
 #include "fragglescript/t_fs.h"
+#include "shadowinlines.h"
 
 // MACROS ------------------------------------------------------------------
 
@@ -120,7 +121,6 @@ EXTERN_CVAR (Int,  cl_rockettrails)
 // PRIVATE DATA DEFINITIONS ------------------------------------------------
 
 static FRandom pr_explodemissile ("ExplodeMissile");
-FRandom pr_bounce ("Bounce");
 static FRandom pr_reflect ("Reflect");
 static FRandom pr_nightmarerespawn ("NightmareRespawn");
 static FRandom pr_botspawnmobj ("BotSpawnActor");
@@ -133,7 +133,6 @@ static FRandom pr_splat ("FAxeSplatter");
 static FRandom pr_ripperblood ("RipperBlood");
 static FRandom pr_chunk ("Chunk");
 static FRandom pr_checkmissilespawn ("CheckMissileSpawn");
-static FRandom pr_spawnmissile ("SpawnMissile");
 static FRandom pr_missiledamage ("MissileDamage");
 static FRandom pr_multiclasschoice ("MultiClassChoice");
 static FRandom pr_rockettrail("RocketTrail");
@@ -142,6 +141,8 @@ static FRandom pr_uniquetid("UniqueTID");
 // PUBLIC DATA DEFINITIONS -------------------------------------------------
 
 FRandom pr_spawnmobj ("SpawnActor");
+FRandom pr_bounce("Bounce");
+FRandom pr_spawnmissile("SpawnMissile");
 
 CUSTOM_CVAR (Float, sv_gravity, 800.f, CVAR_SERVERINFO|CVAR_NOSAVE|CVAR_NOINITCALL)
 {
@@ -6704,21 +6705,8 @@ AActor *P_SpawnMissileXYZ (DVector3 pos, AActor *source, AActor *dest, PClassAct
 	}
 	th->Vel = velocity.Resized(speed);
 
-	// invisible target: rotate velocity vector in 2D
-	// [RC] Now monsters can aim at invisible player as if they were fully visible.
-	if (dest->flags & MF_SHADOW && !(source->flags6 & MF6_SEEINVISIBLE))
-	{
-		DAngle an = DAngle::fromDeg(pr_spawnmissile.Random2() * (22.5 / 256));
-		double c = an.Cos();
-		double s = an.Sin();
-		
-		double newx = th->Vel.X * c - th->Vel.Y * s;
-		double newy = th->Vel.X * s + th->Vel.Y * c;
-
-		th->Vel.X = newx;
-		th->Vel.Y = newy;
-	}
-
+	P_SpawnMissileXYZ_ShadowHandling(source,dest,th);
+	
 	th->AngleFromVel();
 
 	if (th->flags4 & MF4_SPECTRAL)
@@ -6839,10 +6827,8 @@ AActor *P_SpawnMissileZAimed (AActor *source, double z, AActor *dest, PClassActo
 
 	an = source->Angles.Yaw;
 
-	if (dest->flags & MF_SHADOW)
-	{
-		an += DAngle::fromDeg(pr_spawnmissile.Random2() * (16. / 360.));
-	}
+	an += P_SpawnMissileZAimed_ShadowHandling(source,dest);
+
 	dist = source->Distance2D (dest);
 	speed = GetDefaultSpeed (type);
 	dist /= speed;

src/playsim/shadowinlines.h

@@ -0,0 +1,100 @@
+#pragma once
+
+#include "actor.h"
+#include "r_defs.h"
+#include "m_random.h"
+
+//-----------------------------------------------------------------------------
+//
+// DESCRIPTION:
+//		Handling of MF_SHADOW related code for attack and aiming functions.
+//
+//-----------------------------------------------------------------------------
+
+
+// RNG VARIABLES ------------------------------------------------
+extern FRandom pr_spawnmissile;
+extern FRandom pr_facetarget;
+extern FRandom pr_railface;
+extern FRandom pr_crailgun;
+
+//==========================================================================
+//
+// Generic checks
+//
+//==========================================================================
+
+inline bool CheckShadowFlags(AActor* self, AActor* other)
+{
+	return (other->flags & MF_SHADOW && !(self->flags6 & MF6_SEEINVISIBLE));
+}
+
+//==========================================================================
+//
+// Function-specific inlines.
+//
+//==========================================================================
+
+inline void P_SpawnMissileXYZ_ShadowHandling(AActor* source, AActor* target, AActor* missile)
+{
+	// invisible target: rotate velocity vector in 2D
+	// [RC] Now monsters can aim at invisible player as if they were fully visible.
+	if (CheckShadowFlags(source,target))
+	{
+		DAngle an = DAngle::fromDeg(pr_spawnmissile.Random2() * (22.5 / 256));
+		double c = an.Cos();
+		double s = an.Sin();
+
+		double newx = missile->Vel.X * c - missile->Vel.Y * s;
+		double newy = missile->Vel.X * s + missile->Vel.Y * c;
+
+		missile->Vel.X = newx;
+		missile->Vel.Y = newy;
+	}
+	return;
+}
+
+//P_SpawnMissileZAimed uses a local variable for the angle it passes on.
+inline DAngle P_SpawnMissileZAimed_ShadowHandling(AActor* source, AActor* target)
+{
+	if (CheckShadowFlags(source,target))
+	{
+		return DAngle::fromDeg(pr_spawnmissile.Random2() * (16. / 360.));
+	}
+	return nullAngle;
+}
+
+inline void A_Face_ShadowHandling(AActor* self, AActor* other, DAngle max_turn, DAngle other_angle)
+{
+	// This will never work well if the turn angle is limited.
+	if (max_turn == nullAngle && (self->Angles.Yaw == other_angle) && CheckShadowFlags(self, other))
+	{
+		self->Angles.Yaw += DAngle::fromDeg(pr_facetarget.Random2() * (45 / 256.));
+	}
+	return;
+}
+
+inline void A_MonsterRail_ShadowHandling(AActor* self)
+{
+	if (CheckShadowFlags(self, self->target))
+	{
+		self->Angles.Yaw += DAngle::fromDeg(pr_railface.Random2() * 45. / 256);
+	}
+	return;
+}
+
+inline void A_CustomRailgun_ShadowHandling(AActor* self)
+{
+	if (CheckShadowFlags(self, self->target))
+	{
+		DAngle rnd = DAngle::fromDeg(pr_crailgun.Random2() * (45. / 256.));
+		self->Angles.Yaw += rnd;
+	}
+	return;
+}
+
+//A_WolfAttack directly harms the target instead of firing a hitscan or projectile. So it handles shadows by lowering the chance of harming the target.
+inline bool A_WolfAttack_ShadowHandling(AActor* self)
+{
+	return (CheckShadowFlags(self, self->target));
+}