/usr/include/osgParticle/SectorPlacer is in libopenscenegraph-dev 3.2.1-7ubuntu4.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* -*-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_SECTOR_PLACER
#define OSGPARTICLE_SECTOR_PLACER 1
#include <osgParticle/CenteredPlacer>
#include <osgParticle/Particle>
#include <osgParticle/range>
#include <osg/CopyOp>
#include <osg/Object>
#include <osg/Vec3>
#include <osg/Math>
namespace osgParticle
{
/** A sector-shaped particle placer.
This placer sets the initial position of incoming particle by choosing a random position
within a circular sector; this sector is defined by three parameters: a <I>center point</I>,
which is inherited directly from <CODE>osgParticle::CenteredPlacer</CODE>, a range of values
for <I>radius</I>, and a range of values for the <I>central angle</I> (sometimes called <B>phi</B>).
*/
class SectorPlacer: public CenteredPlacer {
public:
inline SectorPlacer();
inline SectorPlacer(const SectorPlacer& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);
/// Get the range of possible values for radius.
inline const rangef& getRadiusRange() const;
/// Set the range of possible values for radius.
inline void setRadiusRange(const rangef& r);
/// Set the range of possible values for radius.
inline void setRadiusRange(float r1, float r2);
/// Get the range of possible values for the central angle.
inline const rangef& getPhiRange() const;
/// Set the range of possible values for the central angle.
inline void setPhiRange(const rangef& r);
/// Set the range of possible values for the central angle.
inline void setPhiRange(float r1, float r2);
META_Object(osgParticle, SectorPlacer);
/// Place a particle. Do not call it manually.
inline void place(Particle* P) const;
/// return the area of the sector
inline float volume() const;
/// return the control position
inline osg::Vec3 getControlPosition() const;
protected:
virtual ~SectorPlacer() {}
SectorPlacer& operator=(const SectorPlacer&) { return *this; }
private:
rangef _rad_range;
rangef _phi_range;
};
// INLINE FUNCTIONS
inline SectorPlacer::SectorPlacer()
: CenteredPlacer(), _rad_range(0, 1), _phi_range(0, osg::PI*2)
{
}
inline SectorPlacer::SectorPlacer(const SectorPlacer& copy, const osg::CopyOp& copyop)
: CenteredPlacer(copy, copyop), _rad_range(copy._rad_range), _phi_range(copy._phi_range)
{
}
inline const rangef& SectorPlacer::getRadiusRange() const
{
return _rad_range;
}
inline const rangef& SectorPlacer::getPhiRange() const
{
return _phi_range;
}
inline void SectorPlacer::setRadiusRange(const rangef& r)
{
_rad_range = r;
}
inline void SectorPlacer::setRadiusRange(float r1, float r2)
{
_rad_range.minimum = r1;
_rad_range.maximum = r2;
}
inline void SectorPlacer::setPhiRange(const rangef& r)
{
_phi_range = r;
}
inline void SectorPlacer::setPhiRange(float r1, float r2)
{
_phi_range.minimum = r1;
_phi_range.maximum = r2;
}
inline void SectorPlacer::place(Particle* P) const
{
float rad = _rad_range.get_random_sqrtf();
float phi = _phi_range.get_random();
osg::Vec3 pos(
getCenter().x() + rad * cosf(phi),
getCenter().y() + rad * sinf(phi),
getCenter().z());
P->setPosition(pos);
}
inline float SectorPlacer::volume() const
{
return 0.5f * (_phi_range.maximum - _phi_range.minimum) *
(_rad_range.maximum*_rad_range.maximum - _rad_range.minimum*_rad_range.minimum);
}
inline osg::Vec3 SectorPlacer::getControlPosition() const
{
return getCenter();
}
}
#endif
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