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

Revision 1092, 4.4 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 __ParticleSystemRenderer_H__
26#define __ParticleSystemRenderer_H__
27
28#include "OgrePrerequisites.h"
29#include "OgreStringInterface.h"
30#include "OgreFactoryObj.h"
31#include "OgreRenderQueue.h"
32
33namespace Ogre {
34
35    /** Abstract class defining the interface required to be implemented
36        by classes which provide rendering capability to ParticleSystem instances.
37    */
38    class _OgreExport ParticleSystemRenderer : public StringInterface
39    {
40    public:
41        /// Constructor
42        ParticleSystemRenderer() {}
43        /// Destructor
44        virtual ~ParticleSystemRenderer() {}
45
46        /** Gets the type of this renderer - must be implemented by subclasses */
47                virtual const String& getType(void) const = 0;
48
49                /** Delegated to by ParticleSystem::_updateRenderQueue
50        @remarks
51            The subclass must update the render queue using whichever Renderable
52            instance(s) it wishes.
53        */
54        virtual void _updateRenderQueue(RenderQueue* queue,
55            std::list<Particle*>& currentParticles, bool cullIndividually) = 0;
56
57        /** Sets the material this renderer must use; called by ParticleSystem. */
58        virtual void _setMaterial(MaterialPtr& mat) = 0;
59        /** Delegated to by ParticleSystem::_notifyCurrentCamera */
60        virtual void _notifyCurrentCamera(Camera* cam) = 0;
61        /** Delegated to by ParticleSystem::_notifyAttached */
62        virtual void _notifyAttached(Node* parent, bool isTagPoint = false) = 0;
63        /** Optional callback notified when particles are rotated */
64        virtual void _notifyParticleRotated(void) {}
65        /** Optional callback notified when particles are resized individually */
66        virtual void _notifyParticleResized(void) {}
67        /** Tells the renderer that the particle quota has changed */
68        virtual void _notifyParticleQuota(size_t quota) = 0;
69        /** Tells the renderer that the particle default size has changed */
70        virtual void _notifyDefaultDimensions(Real width, Real height) = 0;
71                /** Create a new ParticleVisualData instance for attachment to a particle.
72                @remarks
73                        If this renderer needs additional data in each particle, then this should
74                        be held in an instance of a subclass of ParticleVisualData, and this method
75                        should be overridden to return a new instance of it. The default
76                        behaviour is to return null.
77                */
78                virtual ParticleVisualData* _createVisualData(void) { return 0; }
79                /** Destroy a ParticleVisualData instance.
80                @remarks
81                        If this renderer needs additional data in each particle, then this should
82                        be held in an instance of a subclass of ParticleVisualData, and this method
83                        should be overridden to destroy an instance of it. The default
84                        behaviour is to do nothing.
85                */
86                virtual void _destroyVisualData(ParticleVisualData* vis) { assert (vis == 0); }
87
88                /** Sets which render queue group this renderer should target with it's
89                        output.
90                */
91                virtual void setRenderQueueGroup(RenderQueueGroupID queueID) = 0;
92
93
94    };
95
96    /** Abstract class definition of a factory object for ParticleSystemRenderer. */
97    class _OgreExport ParticleSystemRendererFactory : public FactoryObj<ParticleSystemRenderer>
98    {
99    public:
100        // No methods, must just override all methods inherited from FactoryObj
101    };
102
103}
104
105#endif
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