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

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 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// Written by Wang Rui, (C) 2010
14
15#ifndef OSGPARTICLE_BOUNCEOPERATOR
16#define OSGPARTICLE_BOUNCEOPERATOR
17
18#include <osgParticle/Particle>
19#include <osgParticle/DomainOperator>
20
21namespace osgParticle
22{
23
24
25/** A bounce operator can affect the particle's velocity to make it rebound.
26    Refer to David McAllister's Particle System API (http://www.particlesystems.org)
27*/
28class OSGPARTICLE_EXPORT BounceOperator : public DomainOperator
29{
30public:
31    BounceOperator()
32    : DomainOperator(), _friction(1.0f), _resilience(0.0f), _cutoff(0.0f)
33    {}
34
35    BounceOperator( const BounceOperator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY )
36    :   DomainOperator(copy, copyop),
37        _friction(copy._friction), _resilience(copy._resilience), _cutoff(copy._cutoff)
38    {}
39
40    META_Object( osgParticle, BounceOperator );
41
42    /// Set the friction
43    void setFriction( float f ) { _friction = f; }
44
45    /// Get the friction
46    float getFriction() const { return _friction; }
47
48    /// Set the resilience
49    void setResilience( float r ) { _resilience = r; }
50
51    /// Get the velocity cutoff factor
52    float getResilience() const { return _resilience; }
53
54    /// Set the velocity cutoff factor
55    void setCutoff( float v ) { _cutoff = v; }
56
57    /// Get the velocity cutoff factor
58    float getCutoff() const { return _cutoff; }
59
60protected:
61    virtual ~BounceOperator() {}
62    BounceOperator& operator=( const BounceOperator& ) { return *this; }
63
64    virtual void handleTriangle( const Domain& domain, Particle* P, double dt );
65    virtual void handleRectangle( const Domain& domain, Particle* P, double dt );
66    virtual void handlePlane( const Domain& domain, Particle* P, double dt );
67    virtual void handleSphere( const Domain& domain, Particle* P, double dt );
68    virtual void handleDisk( const Domain& domain, Particle* P, double dt );
69
70    float _friction;
71    float _resilience;
72    float _cutoff;
73};
74
75
76}
77
78#endif
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