src/game/ThreatManager.h

   1 /*
   2  * Copyright (C) 2005-2008 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef _THREATMANAGER
  20 #define _THREATMANAGER
  21
  22 #include "Common.h"
  23 #include "SharedDefines.h"
  24 #include "Utilities/LinkedReference/Reference.h"
  25 #include "UnitEvents.h"
  26
  27 #include <list>
  28
  29 //==============================================================
  30
  31 class Unit;
  32 class Creature;
  33 class ThreatManager;
  34 struct SpellEntry;
  35
  36 //==============================================================
  37 // Class to calculate the real threat based
  38
  39 class ThreatCalcHelper
  40 {
  41     public:
  42         static float calcThreat(Unit* pHatedUnit, Unit* pHatingUnit, float threat, SpellSchoolMask schoolMask = SPELL_SCHOOL_MASK_NORMAL, SpellEntry const *threatSpell = NULL);
  43 };
  44
  45 //==============================================================
  46
  47 class MANGOS_DLL_SPEC HostilReference : public Reference<Unit, ThreatManager>
  48 {
  49     private:
  50         float iThreat;
  51         float iTempThreatModifyer;                          // used for taunt
  52         uint64 iUnitGuid;
  53         bool iOnline;
  54         bool iAccessible;
  55     private:
  56         // Inform the source, that the status of that reference was changed
  57         void fireStatusChanged(const ThreatRefStatusChangeEvent& pThreatRefStatusChangeEvent);
  58
  59         Unit* getSourceUnit();
  60     public:
  61         HostilReference(Unit* pUnit, ThreatManager *pThreatManager, float pThreat);
  62
  63         //=================================================
  64         void addThreat(float pMod);
  65
  66         void setThreat(float pThreat) { addThreat(pThreat - getThreat()); }
  67
  68         void addThreatPercent(int32 pPercent) { float tmpThreat = iThreat; tmpThreat = tmpThreat * (pPercent+100) / 100; addThreat(tmpThreat-iThreat); }
  69
  70         float getThreat() const { return iThreat; }
  71
  72         bool isOnline() const { return iOnline; }
  73
  74         // The Unit might be in water and the creature can not enter the water, but has range attack
  75         // in this case online = true, but accessable = false
  76         bool isAccessable() const { return iAccessible; }
  77
  78         // used for temporary setting a threat and reducting it later again.
  79         // the threat modification is stored
  80         void setTempThreat(float pThreat) { iTempThreatModifyer = pThreat - getThreat(); if(iTempThreatModifyer != 0.0f) addThreat(iTempThreatModifyer);  }
  81
  82         void resetTempThreat()
  83         {
  84             if(iTempThreatModifyer != 0.0f)
  85             {
  86                 addThreat(-iTempThreatModifyer);  iTempThreatModifyer = 0.0f;
  87             }
  88         }
  89
  90         float getTempThreatModifyer() { return iTempThreatModifyer; }
  91
  92         //=================================================
  93         // check, if source can reach target and set the status
  94         void updateOnlineStatus();
  95
  96         void setOnlineOfflineState(bool pIsOnline);
  97
  98         void setAccessibleState(bool pIsAccessible);
  99         //=================================================
 100
 101         bool operator ==(const HostilReference& pHostilReference) const { return pHostilReference.getUnitGuid() == getUnitGuid(); }
 102
 103         //=================================================
 104
 105         uint64 getUnitGuid() const { return iUnitGuid; }
 106
 107         //=================================================
 108         // reference is not needed anymore. realy delete it !
 109
 110         void removeReference();
 111
 112         //=================================================
 113
 114         HostilReference* next() { return ((HostilReference* ) Reference<Unit, ThreatManager>::next()); }
 115
 116         //=================================================
 117
 118         // Tell our refTo (target) object that we have a link
 119         void targetObjectBuildLink();
 120
 121         // Tell our refTo (taget) object, that the link is cut
 122         void targetObjectDestroyLink();
 123
 124         // Tell our refFrom (source) object, that the link is cut (Target destroyed)
 125         void sourceObjectDestroyLink();
 126 };
 127
 128 //==============================================================
 129 class ThreatManager;
 130
 131 class MANGOS_DLL_SPEC ThreatContainer
 132 {
 133     private:
 134         std::list<HostilReference*> iThreatList;
 135         bool iDirty;
 136     protected:
 137         friend class ThreatManager;
 138
 139         void remove(HostilReference* pRef) { iThreatList.remove(pRef); }
 140         void addReference(HostilReference* pHostilReference) { iThreatList.push_back(pHostilReference); }
 141         void clearReferences();
 142         // Sort the list if necessary
 143         void update();
 144     public:
 145         ThreatContainer() { iDirty = false; }
 146         ~ThreatContainer() { clearReferences(); }
 147
 148         HostilReference* addThreat(Unit* pVictim, float pThreat);
 149
 150         void modifyThreatPercent(Unit *pVictim, int32 percent);
 151
 152         HostilReference* selectNextVictim(Creature* pAttacker, HostilReference* pCurrentVictim);
 153
 154         void setDirty(bool pDirty) { iDirty = pDirty; }
 155
 156         bool isDirty() { return iDirty; }
 157
 158         bool empty() { return(iThreatList.empty()); }
 159
 160         HostilReference* getMostHated() { return iThreatList.empty() ? NULL : iThreatList.front(); }
 161
 162         HostilReference* getReferenceByTarget(Unit* pVictim);
 163
 164         std::list<HostilReference*>& getThreatList() { return iThreatList; }
 165 };
 166
 167 //=================================================
 168
 169 class MANGOS_DLL_SPEC ThreatManager
 170 {
 171     private:
 172         HostilReference* iCurrentVictim;
 173         Unit* iOwner;
 174         ThreatContainer iThreatContainer;
 175         ThreatContainer iThreatOfflineContainer;
 176     public:
 177         explicit ThreatManager(Unit *pOwner);
 178
 179         ~ThreatManager() { clearReferences(); }
 180
 181         void clearReferences();
 182
 183         void addThreat(Unit* pVictim, float threat, SpellSchoolMask schoolMask = SPELL_SCHOOL_MASK_NORMAL, SpellEntry const *threatSpell = NULL);
 184         void modifyThreatPercent(Unit *pVictim, int32 pPercent);
 185
 186         float getThreat(Unit *pVictim, bool pAlsoSearchOfflineList = false);
 187
 188         bool isThreatListEmpty() { return iThreatContainer.empty();}
 189
 190         bool processThreatEvent(const UnitBaseEvent* pUnitBaseEvent);
 191
 192         HostilReference* getCurrentVictim() { return iCurrentVictim; }
 193
 194         Unit*  getOwner() { return iOwner; }
 195
 196         Unit* getHostilTarget();
 197
 198         void tauntApply(Unit* pTaunter);
 199         void tauntFadeOut(Unit *pTaunter);
 200
 201         void setCurrentVictim(HostilReference* pHostilReference);
 202
 203         void setDirty(bool pDirty) { iThreatContainer.setDirty(pDirty); }
 204
 205         // methods to access the lists from the outside to do sume dirty manipulation (scriping and such)
 206         // I hope they are used as little as possible.
 207         inline std::list<HostilReference*>& getThreatList() { return iThreatContainer.getThreatList(); }
 208         inline std::list<HostilReference*>& getOfflieThreatList() { return iThreatOfflineContainer.getThreatList(); }
 209         inline ThreatContainer& getOnlineContainer() { return iThreatContainer; }
 210         inline ThreatContainer& getOfflineContainer() { return iThreatOfflineContainer; }
 211 };
 212
 213 //=================================================
 214 #endif