/usr/include/osgParticle/ForceOperator is in libopenscenegraph-dev 3.0.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
//osgParticle - Copyright (C) 2002 Marco Jez
#ifndef OSGPARTICLE_FORCEOPERATOR
#define OSGPARTICLE_FORCEOPERATOR 1
#include <osgParticle/ModularProgram>
#include <osgParticle/Operator>
#include <osgParticle/Particle>
#include <osg/CopyOp>
#include <osg/Object>
#include <osg/Vec3>
namespace osgParticle
{
/** An operator that applies a constant force to the particles.
* Remember that if the mass of particles is expressed in kg and the lengths are
* expressed in meters, then the force should be expressed in Newtons.
*/
class ForceOperator: public Operator {
public:
inline ForceOperator();
inline ForceOperator(const ForceOperator& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
META_Object(osgParticle, ForceOperator);
/// Get the force vector.
inline const osg::Vec3& getForce() const;
/// Set the force vector.
inline void setForce(const osg::Vec3& f);
/// Apply the force to a particle. Do not call this method manually.
inline void operate(Particle* P, double dt);
/// Perform some initialization. Do not call this method manually.
inline void beginOperate(Program *prg);
protected:
virtual ~ForceOperator() {};
ForceOperator& operator=(const ForceOperator&) { return *this; }
private:
osg::Vec3 _force;
osg::Vec3 _xf_force;
};
// INLINE FUNCTIONS
inline ForceOperator::ForceOperator()
: Operator(), _force(0, 0, 0)
{
}
inline ForceOperator::ForceOperator(const ForceOperator& copy, const osg::CopyOp& copyop)
: Operator(copy, copyop), _force(copy._force)
{
}
inline const osg::Vec3& ForceOperator::getForce() const
{
return _force;
}
inline void ForceOperator::setForce(const osg::Vec3& v)
{
_force = v;
}
inline void ForceOperator::operate(Particle* P, double dt)
{
P->addVelocity(_xf_force * (P->getMassInv() * dt));
}
inline void ForceOperator::beginOperate(Program *prg)
{
if (prg->getReferenceFrame() == ModularProgram::RELATIVE_RF) {
_xf_force = prg->rotateLocalToWorld(_force);
} else {
_xf_force = _force;
}
}
}
#endif
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