Added ViewAngle/Pitch/Roll properties to actors.

- These are offsets for camera angles that allow turning the camera without affecting aim or movement direction.
- Added SPF_VIEW flag for A_SetAngle/Pitch/Roll, which will set the view direction instead of the actor's actual facing direction.
- Added ABSVIEWANGLES flag, used to make the view absolute instead of an offset.

src/playsim/actor.h

@@ -412,6 +412,7 @@ enum ActorFlag8
 	MF8_RETARGETAFTERSLAM	= 0x00000080,	// Forces jumping to the idle state after slamming into something
 	MF8_RECREATELIGHTS	= 0x00000100,	// Internal flag that signifies that the light attachments need to be recreated at the
 	MF8_STOPRAILS		= 0x00000200,	// [MC] Prevent rails from going further if an actor has this flag.
+	MF8_ABSVIEWANGLES	= 0x00000400,	// [MC] By default view angle/pitch/roll is an offset. This will make it absolute instead.
 };
 
 // --- mobj.renderflags ---
@@ -840,9 +841,9 @@ public:
 	}
 
 	// These also set CF_INTERPVIEW for players.
-	void SetPitch(DAngle p, bool interpolate, bool forceclamp = false);
-	void SetAngle(DAngle ang, bool interpolate);
-	void SetRoll(DAngle roll, bool interpolate);
+	void SetPitch(DAngle p, int fflags);
+	void SetAngle(DAngle ang, int fflags);
+	void SetRoll(DAngle roll, int fflags);
 
 	PClassActor *GetBloodType(int type = 0) const;
 
@@ -956,6 +957,7 @@ public:
 	DAngle			SpriteAngle;
 	DAngle			SpriteRotation;
 	DRotator		Angles;
+	DRotator		ViewAngles;			// Offsets for cameras
 	DVector2		Scale;				// Scaling values; 1 is normal size
 	double			Alpha;				// Since P_CheckSight makes an alpha check this can't be a float. It has to be a double.
 

src/playsim/d_player.h

@@ -415,7 +415,6 @@ public:
 		return mo->FloatVar(NAME_ViewHeight);
 	}
 
-
 	void Uncrouch()
 	{
 		if (crouchfactor != 1)

src/playsim/p_actionfunctions.cpp

@@ -2792,12 +2792,6 @@ DEFINE_ACTION_FUNCTION(AActor, A_MonsterRefire)
 // Set actor's angle (in degrees).
 //
 //===========================================================================
-enum
-{
-	SPF_FORCECLAMP = 1,	// players always clamp
-	SPF_INTERPOLATE = 2,
-};
-
 
 DEFINE_ACTION_FUNCTION(AActor, A_SetAngle)
 {
@@ -2809,7 +2803,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SetAngle)
 	AActor *ref = COPY_AAPTR(self, ptr);
 	if (ref != NULL)
 	{
-		ref->SetAngle(angle, !!(flags & SPF_INTERPOLATE));
+		ref->SetAngle(angle, flags);
 	}
 	return 0;
 }
@@ -2833,7 +2827,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SetPitch)
 
 	if (ref != NULL)
 	{
-		ref->SetPitch(pitch, !!(flags & SPF_INTERPOLATE), !!(flags & SPF_FORCECLAMP));
+		ref->SetPitch(pitch, flags);
 	}
 	return 0;
 }
@@ -2856,7 +2850,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SetRoll)
 
 	if (ref != NULL)
 	{
-		ref->SetRoll(roll, !!(flags & SPF_INTERPOLATE));
+		ref->SetRoll(roll, flags);
 	}
 	return 0;
 }

src/playsim/p_local.h

@@ -217,6 +217,13 @@ enum WARPF
 	WARPF_COPYPITCH			= 0x8000,
 };
 
+enum SPF
+{
+	SPF_FORCECLAMP = 1,	// players always clamp
+	SPF_INTERPOLATE = 2,
+	SPF_VIEW = 4,
+};
+
 enum PCM
 {
 	PCM_DROPOFF =		1,

src/playsim/p_mobj.cpp

@@ -367,7 +367,8 @@ void AActor::Serialize(FSerializer &arc)
 		A("spawnorder", SpawnOrder)
 		A("friction", Friction)
 		A("userlights", UserLights)
-		A("SpriteOffset", SpriteOffset);
+		A("SpriteOffset", SpriteOffset)
+		A("viewangles", ViewAngles);
 }
 
 #undef A
@@ -3349,9 +3350,9 @@ DEFINE_ACTION_FUNCTION(AActor, SetShade)
 	return 0;
 }
 
-void AActor::SetPitch(DAngle p, bool interpolate, bool forceclamp)
+void AActor::SetPitch(DAngle p, int fflags)
 {
-	if (player != NULL || forceclamp)
+	if (player != NULL || fflags & SPF_FORCECLAMP)
 	{ // clamp the pitch we set
 		DAngle min, max;
 
@@ -3367,37 +3368,71 @@ void AActor::SetPitch(DAngle p, bool interpolate, bool forceclamp)
 		}
 		p = clamp(p, min, max);
 	}
-	if (p != Angles.Pitch)
+
+	bool view = (fflags & SPF_VIEW);
+	bool changed = false;
+	if (view)
+	{
+		if (p != ViewAngles.Pitch)
+		{
+			ViewAngles.Pitch = p;
+			changed = true;
+		}
+	}
+	else if (p != Angles.Pitch)
 	{
 		Angles.Pitch = p;
-		if (player != NULL && interpolate)
-		{
-			player->cheats |= CF_INTERPVIEW;
-		}
+		changed = true;
+	}
+	if (changed && player != nullptr && (fflags & SPF_INTERPOLATE))
+	{
+		player->cheats |= CF_INTERPVIEW;
 	}
 }
 
-void AActor::SetAngle(DAngle ang, bool interpolate)
+void AActor::SetAngle(DAngle ang, int fflags)
 {
-	if (ang != Angles.Yaw)
+	bool view = (fflags & SPF_VIEW);
+	bool changed = false;
+	if (view)
+	{
+		if (ang != ViewAngles.Yaw)
+		{
+			ViewAngles.Yaw = ang;
+			changed = true;
+		}
+	}
+	else if (ang != Angles.Yaw)
 	{
 		Angles.Yaw = ang;
-		if (player != NULL && interpolate)
-		{
-			player->cheats |= CF_INTERPVIEW;
-		}
+		changed = true;
+	}
+	if (changed && player != nullptr && (fflags & SPF_INTERPOLATE))
+	{
+		player->cheats |= CF_INTERPVIEW;
 	}
 }
 
-void AActor::SetRoll(DAngle r, bool interpolate)
+void AActor::SetRoll(DAngle r, int fflags)
 {
-	if (r != Angles.Roll)
+	bool view = (fflags & SPF_VIEW);
+	bool changed = false;
+	if (view)
+	{
+		if (r != ViewAngles.Roll)
+		{
+			ViewAngles.Roll = r;
+			changed = true;
+		}
+	}
+	else if (r != Angles.Roll)
 	{
 		Angles.Roll = r;
-		if (player != NULL && interpolate)
-		{
-			player->cheats |= CF_INTERPVIEW;
-		}
+		changed = true;
+	}
+	if (changed && player != nullptr && (fflags & SPF_INTERPOLATE))
+	{
+		player->cheats |= CF_INTERPVIEW;
 	}
 }
 

src/rendering/r_utility.cpp

@@ -804,7 +804,17 @@ void R_SetupFrame (FRenderViewpoint &viewpoint, FViewWindow &viewwindow, AActor
 		viewpoint.sector = viewpoint.camera->Sector;
 		viewpoint.showviewer = false;
 	}
-	iview->New.Angles = viewpoint.camera->Angles;
+
+	// [MC] Apply the view angles first, which is the offsets. If the absolute isn't desired,
+	// add the standard angles on top of it.
+	viewpoint.Angles = viewpoint.camera->ViewAngles;
+
+	if (!(viewpoint.camera->flags8 & MF8_ABSVIEWANGLES))
+	{
+		viewpoint.Angles += viewpoint.camera->Angles;
+	}
+
+	iview->New.Angles = viewpoint.Angles;
 	if (viewpoint.camera->player != 0)
 	{
 		player = viewpoint.camera->player;

src/scripting/thingdef_data.cpp

@@ -324,6 +324,7 @@ static FFlagDef ActorFlagDefs[]=
 	DEFINE_FLAG(MF8, NOFRICTIONBOUNCE, AActor, flags8),
 	DEFINE_FLAG(MF8, RETARGETAFTERSLAM, AActor, flags8),
 	DEFINE_FLAG(MF8, STOPRAILS, AActor, flags8),
+	DEFINE_FLAG(MF8, ABSVIEWANGLES, AActor, flags8),
 
 	// Effect flags
 	DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),

src/scripting/vmthunks_actors.cpp

@@ -1902,6 +1902,9 @@ DEFINE_FIELD(AActor, RenderRequired)
 DEFINE_FIELD(AActor, friendlyseeblocks)
 DEFINE_FIELD(AActor, SpawnTime)
 DEFINE_FIELD(AActor, InventoryID)
+DEFINE_FIELD_NAMED(AActor, ViewAngles.Yaw, viewangle)
+DEFINE_FIELD_NAMED(AActor, ViewAngles.Pitch, viewpitch)
+DEFINE_FIELD_NAMED(AActor, ViewAngles.Roll, viewroll)
 
 DEFINE_FIELD_X(FCheckPosition, FCheckPosition, thing);
 DEFINE_FIELD_X(FCheckPosition, FCheckPosition, pos);

src/utility/namedef.h

@@ -1062,6 +1062,9 @@ xx(AttackZOffset)
 xx(SpawnMask)
 xx(ScoreIcon)
 xx(ViewHeight)
+xx(ViewAngle)
+xx(ViewPitch)
+xx(ViewRoll)
 xx(FallingScreamMinSpeed)
 xx(FallingScreamMaxSpeed)
 xx(GruntSpeed)

wadsrc/static/zscript/actors/actor.zs

@@ -232,6 +232,7 @@ class Actor : Thinker native
 	native uint8 fountaincolor;
 	native double CameraHeight;	// Height of camera when used as such
 	native double CameraFOV;
+	native double ViewAngle, ViewPitch, ViewRoll;
 	native double RadiusDamageFactor;		// Radius damage factor
 	native double SelfDamageFactor;
 	native double StealthAlpha;

wadsrc/static/zscript/constants.zs

@@ -542,6 +542,7 @@ enum EAngleFlags
 {
 	SPF_FORCECLAMP = 1,
 	SPF_INTERPOLATE = 2,
+	SPF_VIEW = 4,
 };
 
 // flags for A_CheckLOF