147 lines
4.3 KiB
C++
147 lines
4.3 KiB
C++
/**
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* MaNGOS is a full featured server for World of Warcraft, supporting
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* the following clients: 1.12.x, 2.4.3, 3.3.5a, 4.3.4a and 5.4.8
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*
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* Copyright (C) 2005-2023 MaNGOS <https://getmangos.eu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* World of Warcraft, and all World of Warcraft or Warcraft art, images,
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* and lore are copyrighted by Blizzard Entertainment, Inc.
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*/
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#ifndef MANGOSSERVER_CAMERA_H
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#define MANGOSSERVER_CAMERA_H
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#include "Common.h"
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#include "GridDefines.h"
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class ViewPoint;
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class WorldObject;
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class UpdateData;
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class WorldPacket;
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class Player;
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/// Camera - object-receiver. Receives broadcast packets from nearby worldobjects, object visibility changes and sends them to client
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class Camera
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{
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friend class ViewPoint;
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public:
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explicit Camera(Player* pl);
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~Camera();
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WorldObject* GetBody() { return m_source;}
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Player* GetOwner() { return &m_owner;}
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// set camera's view to any worldobject
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// Note: this worldobject must be in same map, in same phase with camera's owner(player)
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// client supports only unit and dynamic objects as farsight objects
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void SetView(WorldObject* obj, bool update_far_sight_field = true);
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// set view to camera's owner
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void ResetView(bool update_far_sight_field = true);
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void UpdateVisibilityOf(WorldObject* obj, UpdateData& d, std::set<WorldObject*>& vis);
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void UpdateVisibilityOf(WorldObject* obj);
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void ReceivePacket(WorldPacket* data);
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// updates visibility of worldobjects around viewpoint for camera's owner
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void UpdateVisibilityForOwner();
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private:
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// called when viewpoint changes visibility state
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void Event_AddedToWorld();
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void Event_RemovedFromWorld();
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void Event_Moved();
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void Event_ViewPointVisibilityChanged();
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Player& m_owner;
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WorldObject* m_source;
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void UpdateForCurrentViewPoint();
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public:
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GridReference<Camera>& GetGridRef() { return m_gridRef; }
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bool isActiveObject() const { return false; }
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private:
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GridReference<Camera> m_gridRef;
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};
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/// Object-observer, notifies farsight object state to cameras that attached to it
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class ViewPoint
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{
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friend class Camera;
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typedef std::list<Camera*> CameraList;
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CameraList m_cameras;
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GridType* m_grid;
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void Attach(Camera* c) { m_cameras.push_back(c); }
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void Detach(Camera* c) { m_cameras.remove(c); }
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void CameraCall(void (Camera::*handler)())
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{
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if (!m_cameras.empty())
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{
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for (CameraList::iterator itr = m_cameras.begin(); itr != m_cameras.end();)
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{
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Camera* c = *(itr++);
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(c->*handler)();
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}
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}
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}
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public:
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ViewPoint() : m_grid(0) {}
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~ViewPoint();
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bool hasViewers() const { return !m_cameras.empty(); }
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// these events are called when viewpoint changes visibility state
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void Event_AddedToWorld(GridType* grid)
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{
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m_grid = grid;
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CameraCall(&Camera::Event_AddedToWorld);
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}
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void Event_RemovedFromWorld()
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{
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m_grid = NULL;
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CameraCall(&Camera::Event_RemovedFromWorld);
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}
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void Event_GridChanged(GridType* grid)
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{
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m_grid = grid;
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CameraCall(&Camera::Event_Moved);
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}
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void Event_ViewPointVisibilityChanged()
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{
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CameraCall(&Camera::Event_ViewPointVisibilityChanged);
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}
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void Call_UpdateVisibilityForOwner()
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{
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CameraCall(&Camera::UpdateVisibilityForOwner);
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}
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};
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#endif
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