src/game/ItemEnchantmentMgr.cpp

   1 /*
   2  * Copyright (C) 2005-2009 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 #include <stdlib.h>
  20 #include <functional>
  21 #include "ItemEnchantmentMgr.h"
  22 #include "Database/DatabaseEnv.h"
  23 #include "Log.h"
  24 #include "ObjectMgr.h"
  25 #include "ProgressBar.h"
  26 #include <list>
  27 #include <vector>
  28 #include "Util.h"
  29
  30 struct EnchStoreItem
  31 {
  32     uint32  ench;
  33     float   chance;
  34
  35     EnchStoreItem()
  36         : ench(0), chance(0) {}
  37
  38     EnchStoreItem(uint32 _ench, float _chance)
  39         : ench(_ench), chance(_chance) {}
  40 };
  41
  42 typedef std::vector<EnchStoreItem> EnchStoreList;
  43 typedef UNORDERED_MAP<uint32, EnchStoreList> EnchantmentStore;
  44
  45 static EnchantmentStore RandomItemEnch;
  46
  47 void LoadRandomEnchantmentsTable()
  48 {
  49     RandomItemEnch.clear();                                 // for reload case
  50
  51     EnchantmentStore::iterator tab;
  52     uint32 entry, ench;
  53     float chance;
  54     uint32 count = 0;
  55
  56     QueryResult *result = WorldDatabase.Query("SELECT entry, ench, chance FROM item_enchantment_template");
  57
  58     if (result)
  59     {
  60         barGoLink bar(result->GetRowCount());
  61
  62         do
  63         {
  64             Field *fields = result->Fetch();
  65             bar.step();
  66
  67             entry = fields[0].GetUInt32();
  68             ench = fields[1].GetUInt32();
  69             chance = fields[2].GetFloat();
  70
  71             if (chance > 0.000001f && chance <= 100.0f)
  72                 RandomItemEnch[entry].push_back( EnchStoreItem(ench, chance) );
  73
  74             ++count;
  75         } while (result->NextRow());
  76
  77         delete result;
  78
  79         sLog.outString();
  80         sLog.outString( ">> Loaded %u Item Enchantment definitions", count );
  81     }
  82     else
  83     {
  84         sLog.outString();
  85         sLog.outErrorDb( ">> Loaded 0 Item Enchantment definitions. DB table `item_enchantment_template` is empty.");
  86     }
  87 }
  88
  89 uint32 GetItemEnchantMod(uint32 entry)
  90 {
  91     if (!entry) return 0;
  92
  93     EnchantmentStore::iterator tab = RandomItemEnch.find(entry);
  94
  95     if (tab == RandomItemEnch.end())
  96     {
  97         sLog.outErrorDb("Item RandomProperty / RandomSuffix id #%u used in `item_template` but it doesn't have records in `item_enchantment_template` table.",entry);
  98         return 0;
  99     }
 100
 101     double dRoll = rand_chance();
 102     float fCount = 0;
 103
 104     for(EnchStoreList::iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
 105     {
 106         fCount += ench_iter->chance;
 107
 108         if (fCount > dRoll) return ench_iter->ench;
 109     }
 110
 111     //we could get here only if sum of all enchantment chances is lower than 100%
 112     dRoll =  (irand(0, (int)floor(fCount * 100) + 1)) / 100;
 113     fCount = 0;
 114
 115     for(EnchStoreList::iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
 116     {
 117         fCount += ench_iter->chance;
 118
 119         if (fCount > dRoll) return ench_iter->ench;
 120     }
 121
 122     return 0;
 123 }
 124
 125 uint32 GenerateEnchSuffixFactor(uint32 item_id)
 126 {
 127     ItemPrototype const *itemProto = objmgr.GetItemPrototype(item_id);
 128
 129     if(!itemProto)
 130         return 0;
 131     if(!itemProto->RandomSuffix)
 132         return 0;
 133
 134     RandomPropertiesPointsEntry const *randomProperty = sRandomPropertiesPointsStore.LookupEntry(itemProto->ItemLevel);
 135     if(!randomProperty)
 136         return 0;
 137
 138     uint32 suffixFactor;
 139     switch(itemProto->InventoryType)
 140     {
 141         // Items of that type don`t have points
 142         case INVTYPE_NON_EQUIP:
 143         case INVTYPE_BAG:
 144         case INVTYPE_TABARD:
 145         case INVTYPE_AMMO:
 146         case INVTYPE_QUIVER:
 147         case INVTYPE_RELIC:
 148             return 0;
 149             // Select point coefficient
 150         case INVTYPE_HEAD:
 151         case INVTYPE_BODY:
 152         case INVTYPE_CHEST:
 153         case INVTYPE_LEGS:
 154         case INVTYPE_2HWEAPON:
 155         case INVTYPE_ROBE:
 156             suffixFactor = 0;
 157             break;
 158         case INVTYPE_SHOULDERS:
 159         case INVTYPE_WAIST:
 160         case INVTYPE_FEET:
 161         case INVTYPE_HANDS:
 162         case INVTYPE_TRINKET:
 163             suffixFactor = 1;
 164             break;
 165         case INVTYPE_NECK:
 166         case INVTYPE_WRISTS:
 167         case INVTYPE_FINGER:
 168         case INVTYPE_SHIELD:
 169         case INVTYPE_CLOAK:
 170         case INVTYPE_HOLDABLE:
 171             suffixFactor = 2;
 172             break;
 173         case INVTYPE_WEAPON:
 174         case INVTYPE_WEAPONMAINHAND:
 175         case INVTYPE_WEAPONOFFHAND:
 176             suffixFactor = 3;
 177             break;
 178         case INVTYPE_RANGED:
 179         case INVTYPE_THROWN:
 180         case INVTYPE_RANGEDRIGHT:
 181             suffixFactor = 4;
 182             break;
 183         default:
 184             return 0;
 185     }
 186     // Select rare/epic modifier
 187     switch (itemProto->Quality)
 188     {
 189         case ITEM_QUALITY_UNCOMMON:
 190             return randomProperty->UncommonPropertiesPoints[suffixFactor];
 191         case ITEM_QUALITY_RARE:
 192             return randomProperty->RarePropertiesPoints[suffixFactor];
 193         case ITEM_QUALITY_EPIC:
 194             return randomProperty->EpicPropertiesPoints[suffixFactor];
 195         case ITEM_QUALITY_LEGENDARY:
 196         case ITEM_QUALITY_ARTIFACT:
 197             return 0;                                       // not have random properties
 198         default:
 199             break;
 200     }
 201     return 0;
 202 }