src/game/Traveller.h

   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 #ifndef MANGOS_TRAVELLER_H
  20 #define MANGOS_TRAVELLER_H
  21
  22 #include "Creature.h"
  23 #include "Player.h"
  24 #include <cassert>
  25
  26 /** Traveller is a wrapper for units (creatures or players) that
  27  * travel from point A to point B using the destination holder.
  28  */
  29 #define PLAYER_FLIGHT_SPEED        32.0f
  30
  31 template<class T>
  32 struct MANGOS_DLL_DECL Traveller
  33 {
  34     T &i_traveller;
  35     Traveller(T &t) : i_traveller(t) {}
  36     Traveller(const Traveller &obj) : i_traveller(obj) {}
  37     Traveller& operator=(const Traveller &obj)
  38     {
  39         ~Traveller();
  40         new (this) Traveller(obj);
  41         return *this;
  42     }
  43
  44     operator T&(void) { return i_traveller; }
  45     operator const T&(void) { return i_traveller; }
  46     float GetPositionX() const { return i_traveller.GetPositionX(); }
  47     float GetPositionY() const { return i_traveller.GetPositionY(); }
  48     float GetPositionZ() const { return i_traveller.GetPositionZ(); }
  49     T& GetTraveller(void) { return i_traveller; }
  50
  51     float Speed(void) { assert(false); return 0.0f; }
  52     float GetMoveDestinationTo(float x, float y, float z);
  53     uint32 GetTotalTrevelTimeTo(float x, float y, float z);
  54
  55     void Relocation(float x, float y, float z, float orientation) {}
  56     void Relocation(float x, float y, float z) { Relocation(x, y, z, i_traveller.GetOrientation()); }
  57     void MoveTo(float x, float y, float z, uint32 t) {}
  58 };
  59
  60 template<class T>
  61 inline uint32 Traveller<T>::GetTotalTrevelTimeTo(float x, float y, float z)
  62 {
  63     float dist = GetMoveDestinationTo(x,y,z);
  64     double speed = Speed();
  65
  66     speed *=  0.001f;                                       // speed is in seconds so convert from second to millisecond
  67     return static_cast<uint32>(dist/speed);
  68 }
  69
  70 // specialization for creatures
  71 template<>
  72 inline float Traveller<Creature>::Speed()
  73 {
  74     if(i_traveller.HasMonsterMoveFlag(MONSTER_MOVE_WALK))
  75         return i_traveller.GetSpeed(MOVE_WALK);
  76     else if(i_traveller.HasMonsterMoveFlag(MONSTER_MOVE_FLY))
  77         return i_traveller.GetSpeed(MOVE_FLIGHT);
  78     else
  79         return i_traveller.GetSpeed(MOVE_RUN);
  80 }
  81
  82 template<>
  83 inline void Traveller<Creature>::Relocation(float x, float y, float z, float orientation)
  84 {
  85     i_traveller.GetMap()->CreatureRelocation(&i_traveller, x, y, z, orientation);
  86 }
  87
  88 template<>
  89 inline float Traveller<Creature>::GetMoveDestinationTo(float x, float y, float z)
  90 {
  91     float dx = x - GetPositionX();
  92     float dy = y - GetPositionY();
  93     float dz = z - GetPositionZ();
  94
  95     if(i_traveller.hasUnitState(UNIT_STAT_IN_FLIGHT))
  96         return sqrt((dx*dx) + (dy*dy) + (dz*dz));
  97     else                                                    //Walking on the ground
  98         return sqrt((dx*dx) + (dy*dy));
  99 }
 100
 101
 102 template<>
 103 inline void Traveller<Creature>::MoveTo(float x, float y, float z, uint32 t)
 104 {
 105     i_traveller.AI_SendMoveToPacket(x, y, z, t, i_traveller.GetMonsterMoveFlags(), 0);
 106 }
 107
 108 // specialization for players
 109 template<>
 110 inline float Traveller<Player>::Speed()
 111 {
 112     if (i_traveller.isInFlight())
 113         return PLAYER_FLIGHT_SPEED;
 114     else
 115         return i_traveller.GetSpeed(i_traveller.m_movementInfo.HasMovementFlag(MOVEMENTFLAG_WALK_MODE) ? MOVE_WALK : MOVE_RUN);
 116 }
 117
 118 template<>
 119 inline float Traveller<Player>::GetMoveDestinationTo(float x, float y, float z)
 120 {
 121     float dx = x - GetPositionX();
 122     float dy = y - GetPositionY();
 123     float dz = z - GetPositionZ();
 124
 125     if (i_traveller.isInFlight())
 126         return sqrt((dx*dx) + (dy*dy) + (dz*dz));
 127     else                                                    //Walking on the ground
 128         return sqrt((dx*dx) + (dy*dy));
 129 }
 130
 131 template<>
 132 inline void Traveller<Player>::Relocation(float x, float y, float z, float orientation)
 133 {
 134     i_traveller.GetMap()->PlayerRelocation(&i_traveller, x, y, z, orientation);
 135 }
 136
 137 template<>
 138 inline void Traveller<Player>::MoveTo(float x, float y, float z, uint32 t)
 139 {
 140     //Only send MOVEMENTFLAG_WALK_MODE, client has strange issues with other move flags
 141     i_traveller.SendMonsterMove(x, y, z, 0, MONSTER_MOVE_WALK, t);
 142 }
 143
 144 typedef Traveller<Creature> CreatureTraveller;
 145 typedef Traveller<Player> PlayerTraveller;
 146 #endif