First Commit

For Azeroth!

src/server/game/Combat/ThreatManager.cpp

@@ -0,0 +1,616 @@
+/*
+ * Copyright (C) 
+ * Copyright (C) 
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ThreatManager.h"
+#include "Unit.h"
+#include "Creature.h"
+#include "CreatureAI.h"
+#include "Map.h"
+#include "Player.h"
+#include "ObjectAccessor.h"
+#include "UnitEvents.h"
+#include "SpellAuras.h"
+#include "SpellMgr.h"
+
+//==============================================================
+//================= ThreatCalcHelper ===========================
+//==============================================================
+
+// The hatingUnit is not used yet
+float ThreatCalcHelper::calcThreat(Unit* hatedUnit, Unit* /*hatingUnit*/, float threat, SpellSchoolMask schoolMask, SpellInfo const* threatSpell)
+{
+    if (threatSpell)
+    {
+        if (SpellThreatEntry const*  threatEntry = sSpellMgr->GetSpellThreatEntry(threatSpell->Id))
+            if (threatEntry->pctMod != 1.0f)
+                threat *= threatEntry->pctMod;
+
+        // Energize is not affected by Mods
+        for (uint8 i = 0; i < MAX_SPELL_EFFECTS; i++)
+            if (threatSpell->Effects[i].Effect == SPELL_EFFECT_ENERGIZE || threatSpell->Effects[i].ApplyAuraName == SPELL_AURA_PERIODIC_ENERGIZE)
+                return threat;
+
+        if (Player* modOwner = hatedUnit->GetSpellModOwner())
+            modOwner->ApplySpellMod(threatSpell->Id, SPELLMOD_THREAT, threat);
+    }
+
+    return hatedUnit->ApplyTotalThreatModifier(threat, schoolMask);
+}
+
+bool ThreatCalcHelper::isValidProcess(Unit* hatedUnit, Unit* hatingUnit, SpellInfo const* threatSpell)
+{
+    //function deals with adding threat and adding players and pets into ThreatList
+    //mobs, NPCs, guards have ThreatList and HateOfflineList
+    //players and pets have only InHateListOf
+    //HateOfflineList is used co contain unattackable victims (in-flight, in-water, GM etc.)
+
+    if (!hatedUnit || !hatingUnit)
+        return false;
+
+    // not to self
+    if (hatedUnit == hatingUnit)
+        return false;
+
+    // not to GM
+    if (hatedUnit->GetTypeId() == TYPEID_PLAYER && hatedUnit->ToPlayer()->IsGameMaster())
+        return false;
+
+    // not to dead and not for dead
+    if (!hatedUnit->IsAlive() || !hatingUnit->IsAlive())
+        return false;
+
+    // not in same map or phase
+    if (!hatedUnit->IsInMap(hatingUnit) || !hatedUnit->InSamePhase(hatingUnit))
+        return false;
+
+    // spell not causing threat
+    if (threatSpell && threatSpell->HasAttribute(SPELL_ATTR1_NO_THREAT))
+        return false;
+
+    ASSERT(hatingUnit->GetTypeId() == TYPEID_UNIT);
+
+    return true;
+}
+
+//============================================================
+//================= HostileReference ==========================
+//============================================================
+
+HostileReference::HostileReference(Unit* refUnit, ThreatManager* threatManager, float threat)
+{
+    iThreat = threat;
+    iTempThreatModifier = 0.0f;
+    link(refUnit, threatManager);
+    iUnitGuid = refUnit->GetGUID();
+    iOnline = true;
+}
+
+//============================================================
+// Tell our refTo (target) object that we have a link
+void HostileReference::targetObjectBuildLink()
+{
+    getTarget()->addHatedBy(this);
+}
+
+//============================================================
+// Tell our refTo (taget) object, that the link is cut
+void HostileReference::targetObjectDestroyLink()
+{
+    getTarget()->removeHatedBy(this);
+}
+
+//============================================================
+// Tell our refFrom (source) object, that the link is cut (Target destroyed)
+
+void HostileReference::sourceObjectDestroyLink()
+{
+    setOnlineOfflineState(false);
+}
+
+//============================================================
+// Inform the source, that the status of the reference changed
+
+void HostileReference::fireStatusChanged(ThreatRefStatusChangeEvent& threatRefStatusChangeEvent)
+{
+    if (GetSource())
+        GetSource()->processThreatEvent(&threatRefStatusChangeEvent);
+}
+
+//============================================================
+
+void HostileReference::addThreat(float modThreat)
+{
+    iThreat += modThreat;
+    // the threat is changed. Source and target unit have to be available
+    // if the link was cut before relink it again
+    if (!isOnline())
+        updateOnlineStatus();
+    if (modThreat != 0.0f)
+    {
+        ThreatRefStatusChangeEvent event(UEV_THREAT_REF_THREAT_CHANGE, this, modThreat);
+        fireStatusChanged(event);
+    }
+
+    if (isValid() && modThreat >= 0.0f)
+    {
+        Unit* victimOwner = getTarget()->GetCharmerOrOwner();
+        if (victimOwner && victimOwner->IsAlive())
+            GetSource()->addThreat(victimOwner, 0.0f);     // create a threat to the owner of a pet, if the pet attacks
+    }
+}
+
+void HostileReference::addThreatPercent(int32 percent)
+{
+	// Xinef: Do not allow to modify threat by percent if threat is negative (forced to big value < 0 by spells adding temporary threat)
+	// Xinef: When the temporary effect ends, temporary threat is added back which results in huge additional amount of threat
+	if (iThreat <= 0)
+		return;
+
+    float tmpThreat = iThreat;
+    AddPct(tmpThreat, percent);
+    addThreat(tmpThreat - iThreat);
+}
+
+//============================================================
+// check, if source can reach target and set the status
+
+void HostileReference::updateOnlineStatus()
+{
+    bool online = false;
+
+    if (!isValid())
+        if (Unit* target = ObjectAccessor::GetUnit(*GetSourceUnit(), getUnitGuid()))
+            link(target, GetSource());
+
+    // only check for online status if
+    // ref is valid
+    // target is no player or not gamemaster
+    // target is not in flight
+    if (isValid()
+        && (getTarget()->GetTypeId() != TYPEID_PLAYER || !getTarget()->ToPlayer()->IsGameMaster())
+        && !getTarget()->IsInFlight()
+        && getTarget()->IsInMap(GetSourceUnit())
+        && getTarget()->InSamePhase(GetSourceUnit())
+        )
+    {
+        Creature* creature = GetSourceUnit()->ToCreature();
+        online = getTarget()->isInAccessiblePlaceFor(creature);
+        if (!online)
+        {
+            if (creature->IsWithinCombatRange(getTarget(), creature->m_CombatDistance))
+                online = true;                              // not accessible but stays online
+        }
+    }
+
+    setOnlineOfflineState(online);
+}
+
+//============================================================
+// set the status and fire the event on status change
+
+void HostileReference::setOnlineOfflineState(bool isOnline)
+{
+    if (iOnline != isOnline)
+    {
+        iOnline = isOnline;
+
+        ThreatRefStatusChangeEvent event(UEV_THREAT_REF_ONLINE_STATUS, this);
+        fireStatusChanged(event);
+    }
+}
+
+//============================================================
+// prepare the reference for deleting
+// this is called be the target
+
+void HostileReference::removeReference()
+{
+    invalidate();
+
+    ThreatRefStatusChangeEvent event(UEV_THREAT_REF_REMOVE_FROM_LIST, this);
+    fireStatusChanged(event);
+}
+
+//============================================================
+
+Unit* HostileReference::GetSourceUnit()
+{
+    return (GetSource()->GetOwner());
+}
+
+//============================================================
+//================ ThreatContainer ===========================
+//============================================================
+
+void ThreatContainer::clearReferences()
+{
+    for (ThreatContainer::StorageType::const_iterator i = iThreatList.begin(); i != iThreatList.end(); ++i)
+    {
+        (*i)->unlink();
+        delete (*i);
+    }
+
+    iThreatList.clear();
+}
+
+//============================================================
+// Return the HostileReference of NULL, if not found
+HostileReference* ThreatContainer::getReferenceByTarget(Unit* victim) const
+{
+    if (!victim)
+        return NULL;
+
+    uint64 const guid = victim->GetGUID();
+    for (ThreatContainer::StorageType::const_iterator i = iThreatList.begin(); i != iThreatList.end(); ++i)
+    {
+        HostileReference *ref = (*i);
+        if (ref && ref->getUnitGuid() == guid)
+            return ref;
+    }
+
+    return NULL;
+}
+
+//============================================================
+// Add the threat, if we find the reference
+
+HostileReference* ThreatContainer::addThreat(Unit* victim, float threat)
+{
+    HostileReference* ref = getReferenceByTarget(victim);
+    if (ref)
+        ref->addThreat(threat);
+    return ref;
+}
+
+//============================================================
+
+void ThreatContainer::modifyThreatPercent(Unit* victim, int32 percent)
+{
+    if (HostileReference* ref = getReferenceByTarget(victim))
+        ref->addThreatPercent(percent);
+}
+
+//============================================================
+// Check if the list is dirty and sort if necessary
+
+void ThreatContainer::update()
+{
+    if (iDirty && iThreatList.size() > 1)
+        iThreatList.sort(Trinity::ThreatOrderPred());
+
+    iDirty = false;
+}
+
+//============================================================
+// return the next best victim
+// could be the current victim
+
+HostileReference* ThreatContainer::selectNextVictim(Creature* attacker, HostileReference* currentVictim) const
+{
+	// pussywizard: pretty much remade this whole function
+
+	HostileReference* currentRef = NULL;
+	bool found = false;
+	bool noPriorityTargetFound = false;
+	uint32 currTime = sWorld->GetGameTime();
+
+	// pussywizard: currentVictim is needed to compare if threat was exceeded by 10%/30% for melee/range targets (only then switching current target)
+	if (currentVictim)
+	{
+		Unit* cvUnit = currentVictim->getTarget();
+		if (!attacker->_CanDetectFeignDeathOf(cvUnit) || !attacker->CanCreatureAttack(cvUnit) || attacker->isTargetNotAcceptableByMMaps(cvUnit->GetGUID(), currTime, cvUnit)) // pussywizard: if currentVictim is not valid => don't compare the threat with it, just take the highest threat valid target
+			currentVictim = NULL;
+		else if (cvUnit->IsImmunedToDamageOrSchool(attacker->GetMeleeDamageSchoolMask()) || cvUnit->HasNegativeAuraWithInterruptFlag(AURA_INTERRUPT_FLAG_TAKE_DAMAGE)) // pussywizard: no 10%/30% if currentVictim is immune to damage or has auras breakable by damage
+			currentVictim = NULL;
+	}
+
+	ThreatContainer::StorageType::const_iterator lastRef = iThreatList.end();
+	--lastRef;
+
+	// pussywizard: iterate from highest to lowest threat
+	for (ThreatContainer::StorageType::const_iterator iter = iThreatList.begin(); iter != iThreatList.end() && !found;)
+	{
+		currentRef = (*iter);
+
+		Unit* target = currentRef->getTarget();
+		ASSERT(target); // if the ref has status online the target must be there !
+
+		// pussywizard: don't go to threat comparison if this ref is immune to damage or has aura breakable on damage (second choice target)
+		// pussywizard: if this is the last entry on the threat list, then all targets are second choice, set bool to true and loop threat list again, ignoring this section
+		if (!noPriorityTargetFound && (target->IsImmunedToDamageOrSchool(attacker->GetMeleeDamageSchoolMask()) || target->HasNegativeAuraWithInterruptFlag(AURA_INTERRUPT_FLAG_TAKE_DAMAGE) || target->HasAuraTypeWithCaster(SPELL_AURA_IGNORED, attacker->GetGUID())))
+		{
+			if (iter != lastRef)
+			{
+				++iter;
+				continue;
+			}
+			else
+			{
+				noPriorityTargetFound = true;
+				iter = iThreatList.begin();
+				continue;
+			}
+		}
+
+		// pussywizard: skip not valid targets
+		if (attacker->_CanDetectFeignDeathOf(target) && attacker->CanCreatureAttack(target) && !attacker->isTargetNotAcceptableByMMaps(target->GetGUID(), currTime, target))
+		{
+			if (currentVictim) // pussywizard: if not NULL then target must have 10%/30% more threat
+			{
+				if (currentVictim == currentRef) // pussywizard: nothing found previously was good and enough, currentRef passed all necessary tests, so end now
+				{
+					found = true;
+					break;
+				}
+
+				// pussywizard: implement 110% threat rule for targets in melee range and 130% rule for targets in ranged distances
+				if (currentRef->getThreat() > 1.3f * currentVictim->getThreat()) // pussywizard: enough in all cases, end
+				{
+					found = true;
+					break;
+				}
+				else if (currentRef->getThreat() > 1.1f * currentVictim->getThreat()) // pussywizard: enought only if target in melee range
+				{
+					if (attacker->IsWithinMeleeRange(target))
+					{
+						found = true;
+						break;
+					}
+				}
+				else // pussywizard: nothing found previously was good and enough, this and next entries on the list have less than 110% threat, and currentVictim is present and valid as checked before the loop (otherwise it's NULL), so end now
+				{
+					currentRef = currentVictim;
+					found = true;
+					break;
+				}
+			}
+			else // pussywizard: no currentVictim, first passing all checks is chosen (highest threat, list is sorted)
+			{
+				found = true;
+				break;
+			}
+		}
+		++iter;
+	}
+	if (!found)
+		currentRef = NULL;
+
+	return currentRef;
+}
+
+//============================================================
+//=================== ThreatManager ==========================
+//============================================================
+
+ThreatManager::ThreatManager(Unit* owner) : iCurrentVictim(NULL), iOwner(owner), iUpdateTimer(THREAT_UPDATE_INTERVAL)
+{
+}
+
+//============================================================
+
+void ThreatManager::clearReferences()
+{
+    iThreatContainer.clearReferences();
+    iThreatOfflineContainer.clearReferences();
+    iCurrentVictim = NULL;
+    iUpdateTimer = THREAT_UPDATE_INTERVAL;
+}
+
+//============================================================
+
+void ThreatManager::addThreat(Unit* victim, float threat, SpellSchoolMask schoolMask, SpellInfo const* threatSpell)
+{
+    if (!ThreatCalcHelper::isValidProcess(victim, GetOwner(), threatSpell))
+        return;
+
+    doAddThreat(victim, ThreatCalcHelper::calcThreat(victim, iOwner, threat, schoolMask, threatSpell));
+}
+
+void ThreatManager::doAddThreat(Unit* victim, float threat)
+{
+    uint32 redirectThreadPct = victim->GetRedirectThreatPercent();
+
+    // must check > 0.0f, otherwise dead loop
+    if (threat > 0.0f && redirectThreadPct)
+    {
+        if (Unit* redirectTarget = victim->GetRedirectThreatTarget())
+        {
+            float redirectThreat = CalculatePct(threat, redirectThreadPct);
+            threat -= redirectThreat;
+			if (ThreatCalcHelper::isValidProcess(redirectTarget, GetOwner()))
+				_addThreat(redirectTarget, redirectThreat);
+        }
+    }
+
+    _addThreat(victim, threat);
+}
+
+void ThreatManager::_addThreat(Unit* victim, float threat)
+{
+    HostileReference* ref = iThreatContainer.addThreat(victim, threat);
+    // Ref is not in the online refs, search the offline refs next
+    if (!ref)
+        ref = iThreatOfflineContainer.addThreat(victim, threat);
+
+    if (!ref) // there was no ref => create a new one
+    {
+                                                            // threat has to be 0 here
+        HostileReference* hostileRef = new HostileReference(victim, this, 0);
+        iThreatContainer.addReference(hostileRef);
+        hostileRef->addThreat(threat); // now we add the real threat
+        if (victim->GetTypeId() == TYPEID_PLAYER && victim->ToPlayer()->IsGameMaster())
+            hostileRef->setOnlineOfflineState(false); // GM is always offline
+    }
+}
+
+//============================================================
+
+void ThreatManager::modifyThreatPercent(Unit* victim, int32 percent)
+{
+    iThreatContainer.modifyThreatPercent(victim, percent);
+}
+
+//============================================================
+
+Unit* ThreatManager::getHostilTarget()
+{
+    iThreatContainer.update();
+    HostileReference* nextVictim = iThreatContainer.selectNextVictim(GetOwner()->ToCreature(), getCurrentVictim());
+    setCurrentVictim(nextVictim);
+    return getCurrentVictim() != NULL ? getCurrentVictim()->getTarget() : NULL;
+}
+
+//============================================================
+
+float ThreatManager::getThreat(Unit* victim, bool alsoSearchOfflineList)
+{
+    float threat = 0.0f;
+    HostileReference* ref = iThreatContainer.getReferenceByTarget(victim);
+    if (!ref && alsoSearchOfflineList)
+        ref = iThreatOfflineContainer.getReferenceByTarget(victim);
+    if (ref)
+        threat = ref->getThreat();
+    return threat;
+}
+
+//============================================================
+
+float ThreatManager::getThreatWithoutTemp(Unit* victim, bool alsoSearchOfflineList)
+{
+    float threat = 0.0f;
+    HostileReference* ref = iThreatContainer.getReferenceByTarget(victim);
+    if (!ref && alsoSearchOfflineList)
+        ref = iThreatOfflineContainer.getReferenceByTarget(victim);
+    if (ref)
+        threat = ref->getThreat() - ref->getTempThreatModifier();;
+    return threat;
+}
+
+//============================================================
+
+void ThreatManager::tauntApply(Unit* taunter)
+{
+    HostileReference* ref = iThreatContainer.getReferenceByTarget(taunter);
+    if (getCurrentVictim() && ref && (ref->getThreat() < getCurrentVictim()->getThreat()))
+    {
+        if (ref->getTempThreatModifier() == 0.0f) // Ok, temp threat is unused
+            ref->setTempThreat(getCurrentVictim()->getThreat());
+    }
+}
+
+//============================================================
+
+void ThreatManager::tauntFadeOut(Unit* taunter)
+{
+    HostileReference* ref = iThreatContainer.getReferenceByTarget(taunter);
+    if (ref)
+        ref->resetTempThreat();
+}
+
+//============================================================
+
+void ThreatManager::setCurrentVictim(HostileReference* pHostileReference)
+{
+    if (pHostileReference && pHostileReference != iCurrentVictim)
+    {
+        iOwner->SendChangeCurrentVictimOpcode(pHostileReference);
+    }
+    iCurrentVictim = pHostileReference;
+}
+
+//============================================================
+// The hated unit is gone, dead or deleted
+// return true, if the event is consumed
+
+void ThreatManager::processThreatEvent(ThreatRefStatusChangeEvent* threatRefStatusChangeEvent)
+{
+    threatRefStatusChangeEvent->setThreatManager(this);     // now we can set the threat manager
+
+    HostileReference* hostilRef = threatRefStatusChangeEvent->getReference();
+
+    switch (threatRefStatusChangeEvent->getType())
+    {
+        case UEV_THREAT_REF_THREAT_CHANGE:
+            if ((getCurrentVictim() == hostilRef && threatRefStatusChangeEvent->getFValue()<0.0f) ||
+                (getCurrentVictim() != hostilRef && threatRefStatusChangeEvent->getFValue()>0.0f))
+                setDirty(true);                             // the order in the threat list might have changed
+            break;
+        case UEV_THREAT_REF_ONLINE_STATUS:
+            if (!hostilRef->isOnline())
+            {
+                if (hostilRef == getCurrentVictim())
+                {
+                    setCurrentVictim(NULL);
+                    setDirty(true);
+                }
+                if (GetOwner() && GetOwner()->IsInWorld())
+                    if (Unit* target = ObjectAccessor::GetUnit(*GetOwner(), hostilRef->getUnitGuid()))
+                        if (GetOwner()->IsInMap(target))
+                            GetOwner()->SendRemoveFromThreatListOpcode(hostilRef);
+                iThreatContainer.remove(hostilRef);
+                iThreatOfflineContainer.addReference(hostilRef);
+            }
+            else
+            {
+                if (getCurrentVictim() && hostilRef->getThreat() > (1.1f * getCurrentVictim()->getThreat()))
+                    setDirty(true);
+                iThreatContainer.addReference(hostilRef);
+                iThreatOfflineContainer.remove(hostilRef);
+            }
+            break;
+        case UEV_THREAT_REF_REMOVE_FROM_LIST:
+            if (hostilRef == getCurrentVictim())
+            {
+                setCurrentVictim(NULL);
+                setDirty(true);
+            }
+            iOwner->SendRemoveFromThreatListOpcode(hostilRef);
+            if (hostilRef->isOnline())
+                iThreatContainer.remove(hostilRef);
+            else
+                iThreatOfflineContainer.remove(hostilRef);
+            break;
+    }
+}
+
+bool ThreatManager::isNeedUpdateToClient(uint32 time)
+{
+    if (isThreatListEmpty())
+        return false;
+
+    if (time >= iUpdateTimer)
+    {
+        iUpdateTimer = THREAT_UPDATE_INTERVAL;
+        return true;
+    }
+    iUpdateTimer -= time;
+    return false;
+}
+
+// Reset all aggro without modifying the threatlist.
+void ThreatManager::resetAllAggro()
+{
+    ThreatContainer::StorageType &threatList = iThreatContainer.iThreatList;
+    if (threatList.empty())
+        return;
+
+    for (ThreatContainer::StorageType::iterator itr = threatList.begin(); itr != threatList.end(); ++itr)
+        (*itr)->setThreat(0);
+
+    setDirty(true);
+}