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

Revision 1092, 7.0 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 __BillboardParticleRenderer_H__
26#define __BillboardParticleRenderer_H__
27
28#include "OgrePrerequisites.h"
29#include "OgreParticleSystemRenderer.h"
30#include "OgreBillboardSet.h"
31
32namespace Ogre {
33
34    /** Specialisation of ParticleSystemRenderer to render particles using
35        a BillboardSet.
36    @remarks
37        This renderer has a few more options than the standard particle system,
38        which will be passed to it automatically when the particle system itself
39        does not understand them.
40    */
41    class _OgreExport BillboardParticleRenderer : public ParticleSystemRenderer
42    {
43    protected:
44        /// The billboard set that's doing the rendering
45        BillboardSet* mBillboardSet;
46    public:
47        BillboardParticleRenderer();
48        ~BillboardParticleRenderer();
49
50        /** Command object for billboard type (see ParamCommand).*/
51        class _OgrePrivate CmdBillboardType : public ParamCommand
52        {
53        public:
54            String doGet(const void* target) const;
55            void doSet(void* target, const String& val);
56        };
57        /** Command object for common direction (see ParamCommand).*/
58        class _OgrePrivate CmdCommonDirection : public ParamCommand
59        {
60        public:
61            String doGet(const void* target) const;
62            void doSet(void* target, const String& val);
63        };
64
65        /** Sets the type of billboard to render.
66        @remarks
67            The default sort of billboard (BBT_POINT), always has both x and y axes parallel to
68            the camera's local axes. This is fine for 'point' style billboards (e.g. flares,
69            smoke, anything which is symmetrical about a central point) but does not look good for
70            billboards which have an orientation (e.g. an elongated raindrop). In this case, the
71            oriented billboards are more suitable (BBT_ORIENTED_COMMON or BBT_ORIENTED_SELF) since they retain an independant Y axis
72            and only the X axis is generated, perpendicular to both the local Y and the camera Z.
73        @param bbt The type of billboard to render
74        */
75        void setBillboardType(BillboardType bbt);
76
77        /** Returns the billboard type in use. */
78        BillboardType getBillboardType(void) const;
79
80        /** Sets the point which acts as the origin point for all billboards in this set.
81        @remarks
82        This setting controls the fine tuning of where a billboard appears in relation to it's
83        position. It could be that a billboard's position represents it's center (e.g. for fireballs),
84        it could mean the center of the bottom edge (e.g. a tree which is positioned on the ground),
85        the top-left corner (e.g. a cursor).
86        @par
87        The default setting is BBO_CENTER.
88        @param
89        origin A member of the BillboardOrigin enum specifying the origin for all the billboards in this set.
90        */
91        void setBillboardOrigin(BillboardOrigin origin) { mBillboardSet->setBillboardOrigin(origin); }
92
93        /** Gets the point which acts as the origin point for all billboards in this set.
94        @returns
95        A member of the BillboardOrigin enum specifying the origin for all the billboards in this set.
96        */
97        BillboardOrigin getBillboardOrigin(void) const { return mBillboardSet->getBillboardOrigin(); }
98
99        /** Use this to specify the common direction given to billboards of type BBT_ORIENTED_COMMON.
100        @remarks
101            Use BBT_ORIENTED_COMMON when you want oriented billboards but you know they are always going to
102            be oriented the same way (e.g. rain in calm weather). It is faster for the system to calculate
103            the billboard vertices if they have a common direction.
104        @param vec The direction for all billboards.
105        */
106        void setCommonDirection(const Vector3& vec);
107
108        /** Gets the common direction for all billboards (BBT_ORIENTED_COMMON) */
109        const Vector3& getCommonDirection(void) const;
110
111        /// @copydoc ParticleSystemRenderer::getType
112        const String& getType(void) const;
113        /// @copydoc ParticleSystemRenderer::_updateRenderQueue
114        void _updateRenderQueue(RenderQueue* queue,
115            std::list<Particle*>& currentParticles, bool cullIndividually);
116        /// @copydoc ParticleSystemRenderer::_setMaterial
117        void _setMaterial(MaterialPtr& mat);
118        /// @copydoc ParticleSystemRenderer::_notifyCurrentCamera
119        void _notifyCurrentCamera(Camera* cam);
120        /// @copydoc ParticleSystemRenderer::_notifyParticleRotated
121        void _notifyParticleRotated(void);
122        /// @copydoc ParticleSystemRenderer::_notifyParticleResized
123        void _notifyParticleResized(void);
124        /// @copydoc ParticleSystemRenderer::_notifyParticleQuota
125        void _notifyParticleQuota(size_t quota);
126        /// @copydoc ParticleSystemRenderer::_notifyAttached
127        void _notifyAttached(Node* parent, bool isTagPoint = false);
128        /// @copydoc ParticleSystemRenderer::_notifyDefaultDimensions
129        void _notifyDefaultDimensions(Real width, Real height);
130                /// @copydoc ParticleSystemRenderer::setRenderQueueGroup
131                void setRenderQueueGroup(RenderQueueGroupID queueID);
132
133    protected:
134        static CmdBillboardType msBillboardTypeCmd;
135        static CmdCommonDirection msCommonDirectionCmd;
136
137
138    };
139
140    /** Factory class for BillboardParticleRenderer */
141    class _OgreExport BillboardParticleRendererFactory : public ParticleSystemRendererFactory
142    {
143    public:
144        /// @copydoc FactoryObj::getType
145        const String& getType() const;
146        /// @copydoc FactoryObj::createInstance
147        ParticleSystemRenderer* createInstance( const String& name );   
148        /// @copydoc FactoryObj::destroyInstance
149        void destroyInstance( ParticleSystemRenderer* inst);   
150    };
151
152}
153
154#endif
155
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