text: /*
   * Copyright (C) 2005 - 2012 MaNGOS <http://www.getmangos.com/>
   *
   * Copyright (C) 2008 - 2012 Trinity <http://www.trinitycore.org/>
   *
   * Copyright (C) 2010 - 2012 ProjectSkyfire <http://www.projectskyfire.org/>
   * 
   * Copyright (C) 2011 - 2012 ArkCORE <http://www.arkania.net/>
   *
   * 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, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  
  #include "gamePCH.h"
  #include "Common.h"
  #include "UpdateMask.h"
  #include "Opcodes.h"
  #include "World.h"
  #include "ObjectAccessor.h"
  #include "DatabaseEnv.h"
  #include "GridNotifiers.h"
  #include "CellImpl.h"
  #include "GridNotifiersImpl.h"
  #include "ScriptMgr.h"
  
  DynamicObject::DynamicObject() :
  		WorldObject() {
  	m_objectType |= TYPEMASK_DYNAMICOBJECT;
  	m_objectTypeId = TYPEID_DYNAMICOBJECT;
  
  	m_updateFlag = (UPDATEFLAG_HAS_POSITION | UPDATEFLAG_POSITION);
  
  	m_valuesCount = DYNAMICOBJECT_END;
  
  	m_aura = NULL;
  	m_duration = 0;
  	m_caster = NULL;
  	m_isViewpoint = false;
  }
  
  DynamicObject::~DynamicObject() {
  	// make sure all references were properly removed
  	ASSERT(!m_aura);
  	ASSERT(!m_caster);
  	ASSERT(!m_isViewpoint);
  }
  
  void DynamicObject::AddToWorld() {
  	///- Register the dynamicObject for guid lookup and for caster
  	if (!IsInWorld()) {
  		sObjectAccessor->AddObject(this);
  		WorldObject::AddToWorld();
  		BindToCaster();
  	}
  }
  
  void DynamicObject::RemoveFromWorld() {
  	///- Remove the dynamicObject from the accessor and from all lists of objects in world
  	if (IsInWorld()) {
  		if (m_isViewpoint)
  			RemoveCasterViewpoint();
  
  		if (m_aura)
  			RemoveAura();
  
  		// dynobj could get removed in Aura::RemoveAura
  		if (!IsInWorld())
  			return;
  
  		UnbindFromCaster();
  		WorldObject::RemoveFromWorld();
  		sObjectAccessor->RemoveObject(this);
  	}
  }
  
  bool DynamicObject::Create(uint32 guidlow, Unit *caster, uint32 spellId,
  		const Position &pos, float radius, bool active) {
  	SetMap(caster->GetMap());
  	Relocate(pos);
  	if (!IsPositionValid()) {
  		sLog->outError(
  				"DynamicObject (spell %u) not created. Suggested coordinates isn't valid (X: %f Y: %f)",
  				spellId, GetPositionX(), GetPositionY());
  		return false;
  	}
  
  	WorldObject::_Create(guidlow, HIGHGUID_DYNAMICOBJECT,
  			caster->GetPhaseMask());
  
  	SetEntry(spellId);
  	SetFloatValue(OBJECT_FIELD_SCALE_X, 1);
  	SetUInt64Value(DYNAMICOBJECT_CASTER, caster->GetGUID());
  
  	// The lower word of DYNAMICOBJECT_BYTES must be 0x0001. This value means that the visual radius will be overriden
  	// by client for most of the "ground patch" visual effect spells and a few "skyfall" ones like Hurricane.
  	// If any other value is used, the client will _always_ use the radius provided in DYNAMICOBJECT_RADIUS, but
  	// precompensation is necessary (eg radius *= 2) for many spells. Anyway, blizz sends 0x0001 for all the spells
  	// I saw sniffed...
  	SetUInt32Value(DYNAMICOBJECT_BYTES, 0x00000001);
  	SetUInt32Value(DYNAMICOBJECT_SPELLID, spellId);
  	SetFloatValue(DYNAMICOBJECT_RADIUS, radius);
  	SetUInt32Value(DYNAMICOBJECT_CASTTIME, getMSTime());
  
  	m_isWorldObject = active;
  	return true;
  }
  
  void DynamicObject::Update(uint32 p_time) {
  	// caster has to be always avalable and in the same map
  	ASSERT(m_caster);
  	ASSERT(m_caster->GetMap() == GetMap());
  
  	bool expired = false;
  
  	if (m_aura) {
  		if (!m_aura->IsRemoved())
  			m_aura->UpdateOwner(p_time, this);
  
  		// m_aura may be set to null in Unit::UpdateOwner call
  		if (m_aura && (m_aura->IsRemoved() || m_aura->IsExpired()))
  			expired = true;
  	} else {
  		if (GetDuration() > int32(p_time))
  			m_duration -= p_time;
  		else
  			expired = true;
  	}
  
  	if (expired)
  		Remove();
  	else
  		sScriptMgr->OnDynamicObjectUpdate(this, p_time);
  }
  
  void DynamicObject::Remove() {
  	if (IsInWorld()) {
  		SendObjectDeSpawnAnim(GetGUID());
  		RemoveFromWorld();
  		AddObjectToRemoveList();
  	}
  }
  
  int32 DynamicObject::GetDuration() const {
  	if (!m_aura)
  		return m_duration;
  	else
  		return m_aura->GetDuration();
  }
  
  void DynamicObject::SetDuration(int32 newDuration) {
  	if (!m_aura)
  		m_duration = newDuration;
  	else
  		m_aura->SetDuration(newDuration);
  }
  
  void DynamicObject::Delay(int32 delaytime) {
  	SetDuration(GetDuration() - delaytime);
  }
  
  void DynamicObject::SetAura(Aura * aura) {
  	ASSERT (!m_aura && aura);
  	m_aura = aura;
  }
  
  void DynamicObject::RemoveAura() {
  	ASSERT (m_aura);
  	if (!m_aura->IsRemoved())
  		m_aura->_Remove(AURA_REMOVE_BY_DEFAULT);
  	delete m_aura;
  	m_aura = NULL;
  }
  
  void DynamicObject::SetCasterViewpoint() {
  	if (Player * caster = m_caster->ToPlayer()) {
  		caster->SetViewpoint(this, true);
  		m_isViewpoint = true;
  	}
  }
  
  void DynamicObject::RemoveCasterViewpoint() {
  	if (Player * caster = m_caster->ToPlayer()) {
  		caster->SetViewpoint(this, false);
  		m_isViewpoint = false;
  	}
  }
  
  void DynamicObject::BindToCaster() {
  	ASSERT(!m_caster);
  	m_caster = ObjectAccessor::GetUnit(*this, GetCasterGUID());
  	ASSERT(m_caster);
  	ASSERT(m_caster->GetMap() == GetMap());
  	m_caster->_RegisterDynObject(this);
  }
  
  void DynamicObject::UnbindFromCaster() {
  	ASSERT(m_caster);
  	m_caster->_UnregisterDynObject(this);
  	m_caster = NULL;
  }
  