OpenSceneGraph 3.6.5
ForceOperator
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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//osgParticle - Copyright (C) 2002 Marco Jez
14
15#ifndef OSGPARTICLE_FORCEOPERATOR
16#define OSGPARTICLE_FORCEOPERATOR 1
17
19#include <osgParticle/Operator>
20#include <osgParticle/Particle>
21
22#include <osg/CopyOp>
23#include <osg/Object>
24#include <osg/Vec3>
25
26namespace osgParticle
27{
28
33 class ForceOperator: public Operator {
34 public:
35 inline ForceOperator();
36 inline ForceOperator(const ForceOperator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
37
39
41 inline const osg::Vec3& getForce() const;
42
44 inline void setForce(const osg::Vec3& f);
45
47 inline void operate(Particle* P, double dt);
48
50 inline void beginOperate(Program *prg);
51
52 protected:
53 virtual ~ForceOperator() {};
54 ForceOperator& operator=(const ForceOperator&) { return *this; }
55
56 private:
57 osg::Vec3 _force;
58 osg::Vec3 _xf_force;
59 };
60
61 // INLINE FUNCTIONS
62
64 : Operator(), _force(0, 0, 0)
65 {
66 }
67
68 inline ForceOperator::ForceOperator(const ForceOperator& copy, const osg::CopyOp& copyop)
69 : Operator(copy, copyop), _force(copy._force)
70 {
71 }
72
73 inline const osg::Vec3& ForceOperator::getForce() const
74 {
75 return _force;
76 }
77
78 inline void ForceOperator::setForce(const osg::Vec3& v)
79 {
80 _force = v;
81 }
82
83 inline void ForceOperator::operate(Particle* P, double dt)
84 {
85 P->addVelocity(_xf_force * (P->getMassInv() * dt));
86 }
87
89 {
91 _xf_force = prg->rotateLocalToWorld(_force);
92 } else {
93 _xf_force = _force;
94 }
95 }
96}
97
98#endif
Vec3f Vec3
Definition Vec3:21
The osgParticle library is a NodeKit that extends the core scene graph to support particle effects.
Definition AccelOperator:27
Copy Op(erator) used to control whether shallow or deep copy is used during copy construction and clo...
Definition CopyOp:41
@ SHALLOW_COPY
Definition CopyOp:47
void beginOperate(Program *prg)
Perform some initialization. Do not call this method manually.
Definition ForceOperator:88
void operate(Particle *P, double dt)
Apply the force to a particle. Do not call this method manually.
Definition ForceOperator:83
ForceOperator()
Definition ForceOperator:63
const osg::Vec3 & getForce() const
Get the force vector.
Definition ForceOperator:73
virtual ~ForceOperator()
Definition ForceOperator:53
void setForce(const osg::Vec3 &f)
Set the force vector.
Definition ForceOperator:78
META_Object(osgParticle, ForceOperator)
ForceOperator & operator=(const ForceOperator &)
Definition ForceOperator:54
Operator()
Definition Operator:92
Implementation of a particle.
Definition Particle:47
void addVelocity(const osg::Vec3 &dv)
Add a vector to the velocity vector.
Definition Particle:493
float getMassInv() const
Get 1 / getMass().
Definition Particle:547
@ RELATIVE_RF
Definition ParticleProcessor:42
ReferenceFrame getReferenceFrame() const
Get the reference frame.
Definition ParticleProcessor:179
osg::Vec3 rotateLocalToWorld(const osg::Vec3 &P)
Transform a vector from local to world coordinates, discarding translation (valid only during cull tr...
Definition ParticleProcessor:315
An abstract ParticleProcessor descendant for modifying particles "on the fly" during the cull travers...
Definition Program:36

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