src/game/ItemEnchantmentMgr.cpp

   1 /*
   2  * Copyright (C) 2005-2013 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::const_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         }
  76         while (result->NextRow());
  77
  78         delete result;
  79
  80         sLog.outString();
  81         sLog.outString(">> Loaded %u Item Enchantment definitions", count);
  82     }
  83     else
  84     {
  85         sLog.outString();
  86         sLog.outErrorDb(">> Loaded 0 Item Enchantment definitions. DB table `item_enchantment_template` is empty.");
  87     }
  88 }
  89
  90 uint32 GetItemEnchantMod(uint32 entry)
  91 {
  92     if (!entry) return 0;
  93
  94     EnchantmentStore::const_iterator tab = RandomItemEnch.find(entry);
  95
  96     if (tab == RandomItemEnch.end())
  97     {
  98         sLog.outErrorDb("Item RandomProperty / RandomSuffix id #%u used in `item_template` but it doesn't have records in `item_enchantment_template` table.", entry);
  99         return 0;
 100     }
 101
 102     double dRoll = rand_chance();
 103     float fCount = 0;
 104
 105     for (EnchStoreList::const_iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
 106     {
 107         fCount += ench_iter->chance;
 108
 109         if (fCount > dRoll) return ench_iter->ench;
 110     }
 111
 112     // we could get here only if sum of all enchantment chances is lower than 100%
 113     dRoll = (irand(0, (int)floor(fCount * 100) + 1)) / 100;
 114     fCount = 0;
 115
 116     for (EnchStoreList::const_iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
 117     {
 118         fCount += ench_iter->chance;
 119
 120         if (fCount > dRoll) return ench_iter->ench;
 121     }
 122
 123     return 0;
 124 }
 125
 126 uint32 GenerateEnchSuffixFactor(uint32 item_id)
 127 {
 128     ItemPrototype const* itemProto = ObjectMgr::GetItemPrototype(item_id);
 129
 130     if (!itemProto)
 131         return 0;
 132     if (!itemProto->RandomSuffix)
 133         return 0;
 134
 135     RandomPropertiesPointsEntry const* randomProperty = sRandomPropertiesPointsStore.LookupEntry(itemProto->ItemLevel);
 136     if (!randomProperty)
 137         return 0;
 138
 139     uint32 suffixFactor;
 140     switch (itemProto->InventoryType)
 141     {
 142             // Items of that type don`t have points
 143         case INVTYPE_NON_EQUIP:
 144         case INVTYPE_BAG:
 145         case INVTYPE_TABARD:
 146         case INVTYPE_AMMO:
 147         case INVTYPE_QUIVER:
 148         case INVTYPE_RELIC:
 149             return 0;
 150             // Select point coefficient
 151         case INVTYPE_HEAD:
 152         case INVTYPE_BODY:
 153         case INVTYPE_CHEST:
 154         case INVTYPE_LEGS:
 155         case INVTYPE_2HWEAPON:
 156         case INVTYPE_ROBE:
 157             suffixFactor = 0;
 158             break;
 159         case INVTYPE_SHOULDERS:
 160         case INVTYPE_WAIST:
 161         case INVTYPE_FEET:
 162         case INVTYPE_HANDS:
 163         case INVTYPE_TRINKET:
 164             suffixFactor = 1;
 165             break;
 166         case INVTYPE_NECK:
 167         case INVTYPE_WRISTS:
 168         case INVTYPE_FINGER:
 169         case INVTYPE_SHIELD:
 170         case INVTYPE_CLOAK:
 171         case INVTYPE_HOLDABLE:
 172             suffixFactor = 2;
 173             break;
 174         case INVTYPE_WEAPON:
 175         case INVTYPE_WEAPONMAINHAND:
 176         case INVTYPE_WEAPONOFFHAND:
 177             suffixFactor = 3;
 178             break;
 179         case INVTYPE_RANGED:
 180         case INVTYPE_THROWN:
 181         case INVTYPE_RANGEDRIGHT:
 182             suffixFactor = 4;
 183             break;
 184         default:
 185             return 0;
 186     }
 187     // Select rare/epic modifier
 188     switch (itemProto->Quality)
 189     {
 190         case ITEM_QUALITY_UNCOMMON:
 191             return randomProperty->UncommonPropertiesPoints[suffixFactor];
 192         case ITEM_QUALITY_RARE:
 193             return randomProperty->RarePropertiesPoints[suffixFactor];
 194         case ITEM_QUALITY_EPIC:
 195             return randomProperty->EpicPropertiesPoints[suffixFactor];
 196         case ITEM_QUALITY_LEGENDARY:
 197         case ITEM_QUALITY_ARTIFACT:
 198             return 0;                                       // not have random properties
 199         default:
 200             break;
 201     }
 202     return 0;
 203 }