Implemented spell Target Type (45) 'Target Rings' on Underfoot.

Thanks to Lecht for figuring out op code side of it.

zone/client_packet.cpp

@@ -4034,6 +4034,10 @@ void Client::Handle_OP_CastSpell(const EQApplicationPacket *app)
 			return;
 		}
 
+		targetring_x = castspell->x_pos;
+		targetring_y = castspell->y_pos;
+		targetring_z = castspell->z_pos;
+
 		CastSpell(spell_to_cast, castspell->target_id, castspell->slot);
 	}
 	/* Spell Slot or Potion Belt Slot */

zone/common.h

@@ -494,6 +494,7 @@ typedef enum {
 	GroupSpell,		// causes effect to caster + target's group
 	CAHateList,		// causes effect to all people on caster's hate list within some range
 	DirectionalAE,
+	TargetRing,
 	CastActUnknown
 } CastAction_type;
 

zone/effects.cpp

@@ -764,8 +764,14 @@ void EntityList::AESpell(Mob *caster, Mob *center, uint16 spell_id, bool affect_
 			continue;
 		if (curmob == caster && !affect_caster)	//watch for caster too
 			continue;
-		
-		dist_targ = center->DistNoRoot(*curmob);
+
+		if (spells[spell_id].targettype == ST_Ring){
+			dist_targ = curmob->DistNoRoot(caster->GetTargetRingX(), caster->GetTargetRingY(),caster->GetTargetRingZ());
+		}
+		else if (center){
+			dist_targ = center->DistNoRoot(*curmob);
+		}
+
 		if (dist_targ > dist2)	//make sure they are in range
 			continue;
 		if (dist_targ < min_range2)	//make sure they are in range
@@ -787,7 +793,9 @@ void EntityList::AESpell(Mob *caster, Mob *center, uint16 spell_id, bool affect_
 		if (bad) {
 			if (!caster->IsAttackAllowed(curmob, true))
 				continue;
-			if (!center->CheckLosFN(curmob))
+			if (center && !center->CheckLosFN(curmob))
+				continue;
+			if  (!center && !caster->CheckLosFN(caster->GetTargetRingX(), caster->GetTargetRingY(),caster->GetTargetRingZ(), curmob->GetSize()))
 				continue;
 		} else { // check to stop casting beneficial ae buffs (to wit: bard songs) on enemies...
 			// This does not check faction for beneficial AE buffs..only agro and attackable.

zone/mob.cpp

@@ -369,6 +369,10 @@ Mob::Mob(const char* in_name,
 	nimbus_effect3 = 0;
 	m_targetable = true;
 
+	targetring_x = 0.0f;
+	targetring_y = 0.0f; 
+	targetring_z = 0.0f;
+
 	flymode = FlyMode3;
 	// Pathing
 	PathingLOSState = UnknownLOS;

zone/mob.h

@@ -287,6 +287,9 @@ public:
 	inline virtual uint32 GetNimbusEffect2() const { return nimbus_effect2; }
 	inline virtual uint32 GetNimbusEffect3() const { return nimbus_effect3; }
 	void RemoveNimbusEffect(int effectid);
+	inline float GetTargetRingX() const { return targetring_x; }
+	inline float GetTargetRingY() const { return targetring_y; }
+	inline float GetTargetRingZ() const { return targetring_z; }
 
 	//Basic Stats/Inventory
 	virtual void SetLevel(uint8 in_level, bool command = false) { level = in_level; }
@@ -1231,6 +1234,10 @@ protected:
 	float tar_vz;
 	float test_vector;
 
+	float targetring_x;
+	float targetring_y;
+	float targetring_z;
+
 	uint32 m_spellHitsLeft[38]; // Used to track which spells will have their numhits incremented when spell finishes casting, 38 Buffslots
 	int flymode;
 	bool m_targetable;

zone/spells.cpp

@@ -368,6 +368,7 @@ bool Mob::DoCastSpell(uint16 spell_id, uint16 target_id, uint16 slot,
 	if((IsGroupSpell(spell_id) ||
 		spell.targettype == ST_Self ||
 		spell.targettype == ST_AECaster ||
+		spell.targettype == ST_Ring ||
 		spell.targettype == ST_TargetOptional) && target_id == 0)
 	{
 		mlog(SPELLS__CASTING, "Spell %d auto-targeted the caster. Group? %d, target type %d", spell_id, IsGroupSpell(spell_id), spell.targettype);
@@ -1802,6 +1803,14 @@ bool Mob::DetermineSpellTargets(uint16 spell_id, Mob *&spell_target, Mob *&ae_ce
 			break;
 		}
 
+		case ST_Ring:
+		{
+			CastAction = TargetRing;
+			spell_target = nullptr;
+			ae_center = nullptr;
+			break;
+		}
+
 		default:
 		{
 			mlog(SPELLS__CASTING_ERR, "I dont know Target Type: %d   Spell: (%d) %s", spells[spell_id].targettype, spell_id, spells[spell_id].name);
@@ -2165,6 +2174,11 @@ bool Mob::SpellFinished(uint16 spell_id, Mob *spell_target, uint16 slot, uint16
 			}
 			break;
 		}
+
+		case TargetRing:{
+			entity_list.AESpell(this, nullptr, spell_id, false, resist_adjust);
+			break;
+		}
 	}
 
 	DoAnim(spells[spell_id].CastingAnim, 0, true, IsClient() ? FilterPCSpells : FilterNPCSpells);