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Function will return a cast result, with fail reasons if spell can not be casted (can be used to take alternative action). Please note this is not a full list of cast fail errors/reasons, but will cover a few basic errors that may occur. The virtual function CanCastSpell() may be adjusted for custom needs from script library if not the default is sufficient. Signed-off-by: NoFantasy <nofantasy@nf.no>
117 lines
4.3 KiB
C++
117 lines
4.3 KiB
C++
/*
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* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "CreatureAI.h"
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#include "Creature.h"
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CreatureAI::~CreatureAI()
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{
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}
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void CreatureAI::AttackedBy( Unit* attacker )
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{
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if(!m_creature->getVictim())
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AttackStart(attacker);
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}
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CanCastResult CreatureAI::CanCastSpell(Unit* pTarget, const SpellEntry *pSpell, bool isTriggered)
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{
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// If not triggered, we check
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if (!isTriggered)
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{
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// State does not allow
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if (m_creature->hasUnitState(UNIT_STAT_CONFUSED | UNIT_STAT_STUNNED | UNIT_STAT_FLEEING | UNIT_STAT_DIED))
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return CAST_FAIL_STATE;
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if (pSpell->PreventionType == SPELL_PREVENTION_TYPE_SILENCE && m_creature->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_SILENCED))
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return CAST_FAIL_STATE;
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if (pSpell->PreventionType == SPELL_PREVENTION_TYPE_PACIFY && m_creature->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PACIFIED))
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return CAST_FAIL_STATE;
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// Check for power (also done by Spell::CheckCast())
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if (m_creature->GetPower((Powers)pSpell->powerType) < pSpell->manaCost)
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return CAST_FAIL_POWER;
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}
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if (const SpellRangeEntry *pSpellRange = sSpellRangeStore.LookupEntry(pSpell->rangeIndex))
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{
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if (pTarget != m_creature)
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{
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// pTarget is out of range of this spell (also done by Spell::CheckCast())
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float fDistance = m_creature->GetCombatDistance(pTarget);
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if (fDistance > (m_creature->IsHostileTo(pTarget) ? pSpellRange->maxRange : pSpellRange->maxRangeFriendly))
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return CAST_FAIL_TOO_FAR;
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float fMinRange = m_creature->IsHostileTo(pTarget) ? pSpellRange->minRange : pSpellRange->minRangeFriendly;
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if (fMinRange && fDistance < fMinRange)
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return CAST_FAIL_TOO_CLOSE;
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}
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return CAST_OK;
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}
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else
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return CAST_FAIL_OTHER;
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}
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CanCastResult CreatureAI::DoCastSpellIfCan(Unit* pTarget, uint32 uiSpell, uint32 uiCastFlags, uint64 uiOriginalCasterGUID)
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{
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Unit* pCaster = m_creature;
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if (uiCastFlags & CAST_FORCE_TARGET_SELF)
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pCaster = pTarget;
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// Allowed to cast only if not casting (unless we interrupt ourself) or if spell is triggered
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if (!pCaster->IsNonMeleeSpellCasted(false) || (uiCastFlags & (CAST_TRIGGERED | CAST_INTURRUPT_PREVIOUS)))
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{
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if (const SpellEntry* pSpell = sSpellStore.LookupEntry(uiSpell))
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{
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// If cast flag CAST_AURA_NOT_PRESENT is active, check if target already has aura on them
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if (uiCastFlags & CAST_AURA_NOT_PRESENT)
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{
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if (pTarget->HasAura(uiSpell))
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return CAST_FAIL_TARGET_AURA;
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}
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// Check if cannot cast spell
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if (!(uiCastFlags & (CAST_FORCE_TARGET_SELF | CAST_FORCE_CAST)))
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{
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CanCastResult castResult = CanCastSpell(pTarget, pSpell, uiCastFlags & CAST_TRIGGERED);
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if (castResult != CAST_OK)
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return castResult;
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}
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// Interrupt any previous spell
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if (uiCastFlags & CAST_INTURRUPT_PREVIOUS && pCaster->IsNonMeleeSpellCasted(false))
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pCaster->InterruptNonMeleeSpells(false);
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pCaster->CastSpell(pTarget, pSpell, uiCastFlags & CAST_TRIGGERED, NULL, NULL, uiOriginalCasterGUID);
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return CAST_OK;
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}
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else
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{
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sLog.outErrorDb("DoCastSpellIfCan by creature entry %u attempt to cast spell %u but spell does not exist.", m_creature->GetEntry(), uiSpell);
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return CAST_FAIL_OTHER;
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}
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}
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else
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return CAST_FAIL_IS_CASTING;
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}
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