Formulas.h

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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/>.
 */
 
#ifndef TRINITY_FORMULAS_H
#define TRINITY_FORMULAS_H
 
#include "DBCStores.h"
#include "Creature.h"
#include "Log.h"
#include "Map.h"
#include "Player.h"
#include "ScriptMgr.h"
#include "SharedDefines.h"
#include "World.h"
 
namespace Trinity
{
    namespace Honor
    {
        inline float hk_honor_at_level_f(uint8 level, float multiplier = 1.0f)
        {
            float honor = multiplier * level * 1.55f;
            sScriptMgr->OnHonorCalculation(honor, level, multiplier);
            return honor;
        }
 
        inline uint32 hk_honor_at_level(uint8 level, float multiplier = 1.0f)
        {
            return uint32(ceil(hk_honor_at_level_f(level, multiplier)));
        }
    } // namespace Trinity::Honor
 
    namespace XP
    {
        inline uint8 GetGrayLevel(uint8 pl_level)
        {
            uint8 level;
 
            if (pl_level <= 5)
                level = 0;
            else if (pl_level <= 39)
                level = pl_level - 5 - pl_level / 10;
            else if (pl_level <= 59)
                level = pl_level - 1 - pl_level / 5;
            else
                level = pl_level - 9;
 
            sScriptMgr->OnGrayLevelCalculation(level, pl_level);
            return level;
        }
 
        inline XPColorChar GetColorCode(uint8 pl_level, uint8 mob_level)
        {
            XPColorChar color;
 
            if (mob_level >= pl_level + 5)
                color = XP_RED;
            else if (mob_level >= pl_level + 3)
                color = XP_ORANGE;
            else if (mob_level >= pl_level - 2)
                color = XP_YELLOW;
            else if (mob_level > GetGrayLevel(pl_level))
                color = XP_GREEN;
            else
                color = XP_GRAY;
 
            sScriptMgr->OnColorCodeCalculation(color, pl_level, mob_level);
            return color;
        }
 
        inline uint8 GetZeroDifference(uint8 pl_level)
        {
            uint8 diff;
 
            if (pl_level < 8)
                diff = 5;
            else if (pl_level < 10)
                diff = 6;
            else if (pl_level < 12)
                diff = 7;
            else if (pl_level < 16)
                diff = 8;
            else if (pl_level < 20)
                diff = 9;
            else if (pl_level < 30)
                diff = 11;
            else if (pl_level < 40)
                diff = 12;
            else if (pl_level < 45)
                diff = 13;
            else if (pl_level < 50)
                diff = 14;
            else if (pl_level < 55)
                diff = 15;
            else if (pl_level < 60)
                diff = 16;
            else
                diff = 17;
 
            sScriptMgr->OnZeroDifferenceCalculation(diff, pl_level);
            return diff;
        }
 
        inline uint32 BaseGain(uint8 pl_level, uint8 mob_level, ContentLevels content)
        {
            uint32 baseGain;
            uint32 nBaseExp;
 
            switch (content)
            {
                case CONTENT_1_60:
                    nBaseExp = 45;
                    break;
                case CONTENT_61_70:
                    nBaseExp = 235;
                    break;
                case CONTENT_71_80:
                    nBaseExp = 580;
                    break;
                default:
                    TC_LOG_ERROR("misc", "BaseGain: Unsupported content level {}", content);
                    nBaseExp = 45;
                    break;
            }
 
            if (mob_level >= pl_level)
            {
                uint8 nLevelDiff = mob_level - pl_level;
                if (nLevelDiff > 4)
                    nLevelDiff = 4;
 
                baseGain = ((pl_level * 5 + nBaseExp) * (20 + nLevelDiff) / 10 + 1) / 2;
            }
            else
            {
                uint8 gray_level = GetGrayLevel(pl_level);
                if (mob_level > gray_level)
                {
                    uint8 ZD = GetZeroDifference(pl_level);
                    baseGain = (pl_level * 5 + nBaseExp) * (ZD + mob_level - pl_level) / ZD;
                }
                else
                    baseGain = 0;
            }
 
            if (sWorld->getIntConfig(CONFIG_MIN_CREATURE_SCALED_XP_RATIO))
            {
                // Use mob level instead of player level to avoid overscaling on gain in a min is enforced
                uint32 baseGainMin = (mob_level * 5 + nBaseExp) * sWorld->getIntConfig(CONFIG_MIN_CREATURE_SCALED_XP_RATIO) / 100;
                baseGain = std::max(baseGainMin, baseGain);
            }
 
            sScriptMgr->OnBaseGainCalculation(baseGain, pl_level, mob_level, content);
            return baseGain;
        }
 
        inline uint32 Gain(Player* player, Unit* u, bool isBattleGround = false)
        {
            Creature* creature = u->ToCreature();
            uint32 gain = 0;
 
            if (!creature || creature->CanGiveExperience())
            {
                float xpMod = 1.0f;
 
                gain = BaseGain(player->GetLevel(), u->GetLevel(), GetContentLevelsForMapAndZone(u->GetMapId(), u->GetZoneId()));
 
                if (gain && creature)
                {
                    if (creature->isElite())
                    {
                        // Elites in instances have a 2.75x XP bonus instead of the regular 2x world bonus.
                        if (u->GetMap()->IsDungeon())
                            xpMod *= 2.75f;
                        else
                            xpMod *= 2.0f;
                    }
 
                    xpMod *= creature->GetCreatureTemplate()->ModExperience;
                }
 
                xpMod *= isBattleGround ? sWorld->getRate(RATE_XP_BG_KILL) : sWorld->getRate(RATE_XP_KILL);
                if (creature && creature->m_PlayerDamageReq) // if players dealt less than 50% of the damage and were credited anyway (due to CREATURE_FLAG_EXTRA_NO_PLAYER_DAMAGE_REQ), scale XP gained appropriately (linear scaling)
                    xpMod *= 1.0f - 2.0f * creature->m_PlayerDamageReq / creature->GetMaxHealth();
 
                gain = uint32(gain * xpMod);
            }
 
            sScriptMgr->OnGainCalculation(gain, player, u);
            return gain;
        }
 
        inline float xp_in_group_rate(uint32 count, bool isRaid)
        {
            float rate;
 
            if (isRaid)
            {
                // FIXME: Must apply decrease modifiers depending on raid size.
                rate = 1.0f;
            }
            else
            {
                switch (count)
                {
                    case 0:
                    case 1:
                    case 2:
                        rate = 1.0f;
                        break;
                    case 3:
                        rate = 1.166f;
                        break;
                    case 4:
                        rate = 1.3f;
                        break;
                    case 5:
                    default:
                        rate = 1.4f;
                }
            }
 
            sScriptMgr->OnGroupRateCalculation(rate, count, isRaid);
            return rate;
        }
    } // namespace Trinity::XP
} // namespace Trinity
 
#endif