Add PushSound property and Slide state

First Commit, hip hip hooray!

src/namedef_custom.h

@@ -349,6 +349,7 @@ xx(GenericFreezeDeath)
 xx(GenericCrush)
 xx(DieFromSpawn)
 xx(Slam)
+xx(Slide)
 
 // Bounce state names
 xx(Bounce)

src/playsim/actor.h

@@ -810,6 +810,9 @@ public:
 	// plays bouncing sound
 	void PlayBounceSound(bool onfloor);
 
+	// plays pushing sound
+	void PlayPushSound();
+
 	// Called when an actor with MF_MISSILE and MF2_FLOORBOUNCE hits the floor
 	bool FloorBounceMissile (secplane_t &plane);
 
@@ -1237,6 +1240,7 @@ public:
 	FSoundIDNoInit BounceSound;
 	FSoundIDNoInit WallBounceSound;
 	FSoundIDNoInit CrushPainSound;
+	FSoundIDNoInit PushSound;		// [UZ] Sound to play when an actor is being pushed around.
 
 	double MaxDropOffHeight;
 	double MaxStepHeight;

src/playsim/p_acs.cpp

@@ -4655,6 +4655,7 @@ enum
 	SOUND_WallBounce,
 	SOUND_CrushPain,
 	SOUND_Howl,
+	SOUND_Push,
 };
 
 static FSoundID GetActorSound(AActor *actor, int soundtype)
@@ -4671,6 +4672,7 @@ static FSoundID GetActorSound(AActor *actor, int soundtype)
 	case SOUND_WallBounce:	return actor->WallBounceSound;
 	case SOUND_CrushPain:	return actor->CrushPainSound;
 	case SOUND_Howl:		return actor->SoundVar(NAME_HowlSound);
+	case SOUND_Push:		return actor->PushSound;
 	default:				return 0;
 	}
 }

src/playsim/p_map.cpp

@@ -1686,6 +1686,17 @@ bool PIT_CheckThing(FMultiBlockThingsIterator &it, FMultiBlockThingsIterator::Ch
 		{
 			thing->Vel += tm.thing->Vel.XY() * thing->pushfactor;
 			thing->lastpush = tm.PushTime;
+
+			FState* push = thing->FindState(NAME_Slide);
+			if (push != NULL)
+			{
+				thing->SetState(push);
+				thing->PlayPushSound();
+			}
+			else
+			{
+				thing->SetIdle();
+			}
 		}
 	}
 	solid = (thing->flags & MF_SOLID) &&

src/playsim/p_mobj.cpp

@@ -280,6 +280,7 @@ void AActor::Serialize(FSerializer &arc)
 		A("bouncesound", BounceSound)
 		A("wallbouncesound", WallBounceSound)
 		A("crushpainsound", CrushPainSound)
+		A("pushsound", PushSound)
 		A("speed", Speed)
 		A("floatspeed", FloatSpeed)
 		A("mass", Mass)
@@ -3313,6 +3314,21 @@ DEFINE_ACTION_FUNCTION(AActor, PlayActiveSound)
 	return 0;
 }
 
+void AActor::PlayPushSound()
+{
+	if (PushSound && !S_IsActorPlayingSomething(this, CHAN_VOICE, -1))
+	{
+		S_Sound(this, CHAN_VOICE, 0, PushSound, 1, ATTN_IDLE);
+	}
+}
+
+DEFINE_ACTION_FUNCTION(AActor, PlayPushSound)
+{
+	PARAM_SELF_PROLOGUE(AActor);
+	self->PlayPushSound();
+	return 0;
+}
+
 bool AActor::IsOkayToAttack (AActor *link)
 {
 	// Standard things to eliminate: an actor shouldn't attack itself,

src/scripting/vmthunks_actors.cpp

@@ -1992,6 +1992,7 @@ DEFINE_FIELD(AActor, UseSound)
 DEFINE_FIELD(AActor, BounceSound)
 DEFINE_FIELD(AActor, WallBounceSound)
 DEFINE_FIELD(AActor, CrushPainSound)
+DEFINE_FIELD(AActor, PushSound)
 DEFINE_FIELD(AActor, MaxDropOffHeight)
 DEFINE_FIELD(AActor, MaxStepHeight)
 DEFINE_FIELD(AActor, MaxSlopeSteepness)

wadsrc/static/zscript/actors/actor.zs

@@ -227,6 +227,7 @@ class Actor : Thinker native
 	native sound BounceSound;
 	native sound WallBounceSound;
 	native sound CrushPainSound;
+	native sound PushSound;
 	native double MaxDropoffHeight;
 	native double MaxStepHeight;
 	native double MaxSlopeSteepness;
@@ -323,6 +324,7 @@ class Actor : Thinker native
 	property DeathSound: DeathSound;
 	property ActiveSound: ActiveSound;
 	property CrushPainSound: CrushPainSound;
+	property PushSound: PushSound;
 	property Alpha: Alpha;
 	property MaxTargetRange: MaxTargetRange;
 	property MeleeThreshold: MeleeThreshold;
@@ -468,6 +470,7 @@ class Actor : Thinker native
 		MarkSound(CrushPainSound);
 		MarkSound(HowlSound);
 		MarkSound(MeleeSound);
+		MarkSound(PushSound);
 	}
 
 	bool IsPointerEqual(int ptr_select1, int ptr_select2)
@@ -805,6 +808,7 @@ class Actor : Thinker native
 	native clearscope double GetCameraHeight() const;
 	native clearscope double GetGravity() const;
 	native void DoMissileDamage(Actor target);
+	native void PlayPushSound();
 
 	//==========================================================================
 	//