root/OpenSceneGraph/trunk/include/osgParticle/ConnectedParticleSystem @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSGPARTICLE_CONNECTEDPARTICLESYSTEM
15#define OSGPARTICLE_CONNECTEDPARTICLESYSTEM 1
16
17#include <osgParticle/ParticleSystem>
18
19namespace osgParticle
20{
21
22    /** ConnectConnectedParticleSystem is a specialise ConnectedParticleSystem for effects
23      * like missle trails, where the individual particles are rendered as
24      * single ribbon.
25    */
26    class OSGPARTICLE_EXPORT ConnectedParticleSystem: public osgParticle::ParticleSystem
27    {
28    public:
29
30        ConnectedParticleSystem();
31        ConnectedParticleSystem(const ConnectedParticleSystem& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
32
33        META_Object(osgParticle, ConnectedParticleSystem);
34
35        /// Create a new particle from the specified template (or the default one if <CODE>ptemplate</CODE> is null).
36        virtual Particle* createParticle(const Particle* ptemplate);
37
38        /// Reuse the i-th particle.
39        virtual void reuseParticle(int i);
40
41        /// Draw the connected particles as either a line or a quad strip, depending upon viewing distance. .
42        virtual void drawImplementation(osg::RenderInfo& renderInfo) const;
43
44        ///Get the (const) particle from where the line or quadstrip starts to be drawn
45        const osgParticle::Particle* getStartParticle() const
46        {
47            return (_startParticle != Particle::INVALID_INDEX) ? &_particles[_startParticle] : 0;
48        }
49
50        ///Get the particle from where the line or quadstrip starts to be drawn
51        osgParticle::Particle* getStartParticle()
52        {
53            return (_startParticle != Particle::INVALID_INDEX) ? &_particles[_startParticle] : 0;
54        }
55
56        ///Set the maximum numbers of particles to be skipped during the predraw filtering
57        void setMaxNumberOfParticlesToSkip(unsigned int maxNumberofParticlesToSkip){_maxNumberOfParticlesToSkip = maxNumberofParticlesToSkip;}
58
59        ///Get the maximum numbers of particles to be skipped during the predraw filtering
60        unsigned int getMaxNumberOfParticlesToSkip(){ return _maxNumberOfParticlesToSkip;}
61
62    protected:
63
64        virtual ~ConnectedParticleSystem();
65
66        ConnectedParticleSystem& operator=(const ConnectedParticleSystem&) { return *this; }
67
68        int _lastParticleCreated;
69        unsigned int _maxNumberOfParticlesToSkip;
70
71        int _startParticle;
72
73      };
74
75
76
77}
78
79#endif
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