source: GTP/trunk/App/Demos/Geom/OgreStuff/include/OgreSceneManagerEnumerator.h @ 1092

Revision 1092, 5.7 KB checked in by gumbau, 18 years ago (diff)

LodStrips? and LODTrees demos

Line 
1/*
2-----------------------------------------------------------------------------
3This source file is part of OGRE
4    (Object-oriented Graphics Rendering Engine)
5For the latest info, see http://www.ogre3d.org/
6
7Copyright (c) 2000-2005 The OGRE Team
8Also see acknowledgements in Readme.html
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU Lesser General Public License as published by the Free Software
12Foundation; either version 2 of the License, or (at your option) any later
13version.
14
15This program is distributed in the hope that it will be useful, but WITHOUT
16ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18
19You should have received a copy of the GNU Lesser General Public License along with
20this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22http://www.gnu.org/copyleft/lesser.txt.
23-----------------------------------------------------------------------------
24*/
25#ifndef __SceneManagerEnumerator_H__
26#define __SceneManagerEnumerator_H__
27
28#include "OgrePrerequisites.h"
29
30#include "OgreSceneManager.h"
31#include "OgreSingleton.h"
32
33namespace Ogre {
34    /** Classification of a scene to allow a decision of what type of
35        SceenManager to provide back to the application.
36    */
37    enum SceneType
38    {
39        ST_GENERIC,
40        ST_EXTERIOR_CLOSE,
41        ST_EXTERIOR_FAR,
42        ST_EXTERIOR_REAL_FAR,
43        ST_INTERIOR
44    };
45    /** Enumerates the SceneManager classes available to applications.
46        @remarks
47            As described in the SceneManager class, SceneManagers are responsible
48            for organising the scene and issuing rendering commands to the
49            RenderSystem. Certain scene types can benefit from different
50            rendering approaches, and it is intended that subclasses will
51            be created to special case this.
52        @par
53            In order to give applications easy access to these implementations,
54            the Root object has a getSceneManager method to retrieve a SceneManager
55            which is appropriate to the scene type. However, this is the class
56            which implements this behaviour and defines the scene types, because
57            it is intended that the Root class is not customised by everybody
58            (and it may be restricted access in the future).
59        @par
60            If you customise Ogre and want to add a new SceneManager implementation
61            (e.g. an Octree-based scene manager for outside locations), feel
62            free to customise this class so that it is passed back where
63            required.
64        @par
65            For this early release of Ogre, only the basic SceneManager implementation
66            is passed back for all scene types. This is a highly generic and
67            extremely unoptimised reference implementation.
68    */
69    class _OgreExport SceneManagerEnumerator : public Singleton<SceneManagerEnumerator>
70    {
71    private:
72        // Set of SceneManagers (unique entries)
73        std::set<SceneManager*> mUniqueSceneMgrs;
74        // Collection of loaded scene managers, keyed by scene type
75        typedef std::map<SceneType, SceneManager*> SceneManagerList ;
76        SceneManagerList mSceneManagers;
77
78        /// Standard scene manager for default management
79        SceneManager* mDefaultManager;
80
81
82    public:
83        SceneManagerEnumerator();
84        ~SceneManagerEnumerator();
85
86        /** Sets a SceneManager implementation.
87        */
88        void setSceneManager(SceneType st, SceneManager* sm);
89
90        /** Implementation of SceneManager retrieval.
91        */
92        SceneManager* getSceneManager(SceneType st);
93
94        /** Notifies all SceneManagers of the destination rendering system.
95        */
96        void setRenderSystem(RenderSystem* rs);
97
98        /// Utility method to control shutdown of the managers
99        void shutdownAll(void);
100        /** Override standard Singleton retrieval.
101        @remarks
102        Why do we do this? Well, it's because the Singleton
103        implementation is in a .h file, which means it gets compiled
104        into anybody who includes it. This is needed for the
105        Singleton template to work, but we actually only want it
106        compiled into the implementation of the class based on the
107        Singleton, not all of them. If we don't change this, we get
108        link errors when trying to use the Singleton-based class from
109        an outside dll.
110        @par
111        This method just delegates to the template version anyway,
112        but the implementation stays in this single compilation unit,
113        preventing link errors.
114        */
115        static SceneManagerEnumerator& getSingleton(void);
116        /** Override standard Singleton retrieval.
117        @remarks
118        Why do we do this? Well, it's because the Singleton
119        implementation is in a .h file, which means it gets compiled
120        into anybody who includes it. This is needed for the
121        Singleton template to work, but we actually only want it
122        compiled into the implementation of the class based on the
123        Singleton, not all of them. If we don't change this, we get
124        link errors when trying to use the Singleton-based class from
125        an outside dll.
126        @par
127        This method just delegates to the template version anyway,
128        but the implementation stays in this single compilation unit,
129        preventing link errors.
130        */
131        static SceneManagerEnumerator* getSingletonPtr(void);
132
133    };
134
135
136}
137
138#endif
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