src/game/Camera.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 "Camera.h"
  20 #include "GridNotifiersImpl.h"
  21 #include "CellImpl.h"
  22 #include "Log.h"
  23 #include "Errors.h"
  24 #include "Player.h"
  25
  26 Camera::Camera(Player* pl) : m_owner(*pl), m_source(pl)
  27 {
  28     m_source->GetViewPoint().Attach(this);
  29 }
  30
  31 Camera::~Camera()
  32 {
  33     // view of camera should be already reseted to owner (RemoveFromWorld -> Event_RemovedFromWorld -> ResetView)
  34     MANGOS_ASSERT(m_source == &m_owner);
  35
  36     // for symmetry with constructor and way to make viewpoint's list empty
  37     m_source->GetViewPoint().Detach(this);
  38 }
  39
  40 void Camera::ReceivePacket(WorldPacket* data)
  41 {
  42     m_owner.SendDirectMessage(data);
  43 }
  44
  45 void Camera::UpdateForCurrentViewPoint()
  46 {
  47     m_gridRef.unlink();
  48
  49     if (GridType* grid = m_source->GetViewPoint().m_grid)
  50         grid->AddWorldObject(this);
  51
  52     UpdateVisibilityForOwner();
  53 }
  54
  55 void Camera::SetView(WorldObject* obj, bool update_far_sight_field /*= true*/)
  56 {
  57     MANGOS_ASSERT(obj);
  58
  59     if (m_source == obj)
  60         return;
  61
  62     if (!m_owner.IsInMap(obj))
  63     {
  64         sLog.outError("Camera::SetView, viewpoint is not in map with camera's owner");
  65         return;
  66     }
  67
  68     if (!obj->isType(TypeMask(TYPEMASK_DYNAMICOBJECT | TYPEMASK_UNIT)))
  69     {
  70         sLog.outError("Camera::SetView, viewpoint type is not available for client");
  71         return;
  72     }
  73
  74     // detach and deregister from active objects if there are no more reasons to be active
  75     m_source->GetViewPoint().Detach(this);
  76     if (!m_source->isActiveObject())
  77         m_source->GetMap()->RemoveFromActive(m_source);
  78
  79     m_source = obj;
  80
  81     if (!m_source->isActiveObject())
  82         m_source->GetMap()->AddToActive(m_source);
  83
  84     m_source->GetViewPoint().Attach(this);
  85
  86     if (update_far_sight_field)
  87         m_owner.SetGuidValue(PLAYER_FARSIGHT, (m_source == &m_owner ? ObjectGuid() : m_source->GetObjectGuid()));
  88
  89     UpdateForCurrentViewPoint();
  90 }
  91
  92 void Camera::Event_ViewPointVisibilityChanged()
  93 {
  94     if (!m_owner.HaveAtClient(m_source))
  95         ResetView();
  96 }
  97
  98 void Camera::ResetView(bool update_far_sight_field /*= true*/)
  99 {
 100     SetView(&m_owner, update_far_sight_field);
 101 }
 102
 103 void Camera::Event_AddedToWorld()
 104 {
 105     GridType* grid = m_source->GetViewPoint().m_grid;
 106     MANGOS_ASSERT(grid);
 107     grid->AddWorldObject(this);
 108
 109     UpdateVisibilityForOwner();
 110 }
 111
 112 void Camera::Event_RemovedFromWorld()
 113 {
 114     if (m_source == &m_owner)
 115     {
 116         m_gridRef.unlink();
 117         return;
 118     }
 119
 120     ResetView();
 121 }
 122
 123 void Camera::Event_Moved()
 124 {
 125     m_gridRef.unlink();
 126     m_source->GetViewPoint().m_grid->AddWorldObject(this);
 127 }
 128
 129 void Camera::UpdateVisibilityOf(WorldObject* target)
 130 {
 131     m_owner.UpdateVisibilityOf(m_source, target);
 132 }
 133
 134 template<class T>
 135 void Camera::UpdateVisibilityOf(T* target, UpdateData& data, std::set<WorldObject*>& vis)
 136 {
 137     m_owner.template UpdateVisibilityOf<T>(m_source, target, data, vis);
 138 }
 139
 140 template void Camera::UpdateVisibilityOf(Player*        , UpdateData& , std::set<WorldObject*>&);
 141 template void Camera::UpdateVisibilityOf(Creature*      , UpdateData& , std::set<WorldObject*>&);
 142 template void Camera::UpdateVisibilityOf(Corpse*        , UpdateData& , std::set<WorldObject*>&);
 143 template void Camera::UpdateVisibilityOf(GameObject*    , UpdateData& , std::set<WorldObject*>&);
 144 template void Camera::UpdateVisibilityOf(DynamicObject* , UpdateData& , std::set<WorldObject*>&);
 145
 146 void Camera::UpdateVisibilityForOwner()
 147 {
 148     MaNGOS::VisibleNotifier notifier(*this);
 149     Cell::VisitAllObjects(m_source, notifier, m_source->GetMap()->GetVisibilityDistance(), false);
 150     notifier.Notify();
 151 }
 152
 153 //////////////////
 154
 155 ViewPoint::~ViewPoint()
 156 {
 157     if (!m_cameras.empty())
 158     {
 159         sLog.outError("ViewPoint destructor called, but some cameras referenced to it");
 160     }
 161 }