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Improved ParticleEffects

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This commit is contained in:
Robert Osfield
2005-04-04 07:54:52 +00:00
parent e4580f2028
commit 22e446dbc9
25 changed files with 917 additions and 289 deletions
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145
src/osgParticle/ExplosionDebriEffect.cpp Normal file
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@@ -0,0 +1,145 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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.
*/
#include <osgParticle/ExplosionDebriEffect>
#include <osgParticle/ExplosionDebriEffect>
#include <osgParticle/ModularEmitter>
#include <osgParticle/ModularProgram>
#include <osgParticle/RandomRateCounter>
#include <osgParticle/SectorPlacer>
#include <osgParticle/RadialShooter>
#include <osgParticle/AccelOperator>
#include <osgParticle/FluidFrictionOperator>
#include <osgParticle/ParticleSystemUpdater>
#include <osg/Geode>
using namespace osgParticle;
ExplosionDebriEffect::ExplosionDebriEffect(const osg::Vec3& position, float scale, float intensity)
{
setDefaults();
_position = position;
_scale = scale;
_intensity = intensity;
_emitterDuration = 0.1;
_particleDuration = 1.0+0.6*_scale;
buildEffect();
}
ExplosionDebriEffect::ExplosionDebriEffect(const ExplosionDebriEffect& copy, const osg::CopyOp& copyop):
ParticleEffect(copy,copyop)
{
}
void ExplosionDebriEffect::setDefaults()
{
ParticleEffect::setDefaults();
_emitterDuration = 0.1;
_particleDuration = 1.0+0.6*_scale;
}
void ExplosionDebriEffect::setUpEmitterAndProgram()
{
// set up particle system
if (!_particleSystem)
{
_particleSystem = new osgParticle::ParticleSystem;
}
if (_particleSystem.valid())
{
_particleSystem->setDefaultAttributes("Images/particle.rgb", false, false);
osgParticle::Particle& ptemplate = _particleSystem->getDefaultParticleTemplate();
ptemplate.setLifeTime(_particleDuration);
float radius = 0.05f*_scale;
float density = 1000.0f; // 1000.0kg/m^3
// the following ranges set the envelope of the respective
// graphical properties in time.
ptemplate.setSizeRange(osgParticle::rangef(radius*0.75f, radius*3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.0f, 1.0f));
ptemplate.setColorRange(osgParticle::rangev4(
osg::Vec4(0.5f, 0.5f, 0.0f, 1.0f),
osg::Vec4(0.2f, 0.2f, 0.2f, 0.5f)));
// these are physical properties of the particle
ptemplate.setRadius(radius); // 5 cm wide particles
ptemplate.setMass(density*osg::PI*4.0f*radius*radius*radius/3.0f);
}
// set up emitter
if (!_emitter)
{
_emitter = new osgParticle::ModularEmitter;
_emitter->setCounter(new osgParticle::RandomRateCounter);
_emitter->setPlacer(new osgParticle::SectorPlacer);
_emitter->setShooter(new osgParticle::RadialShooter);
}
if (_emitter.valid())
{
_emitter->setParticleSystem(_particleSystem.get());
_emitter->setReferenceFrame(_useLocalParticleSystem?
osgParticle::ParticleProcessor::ABSOLUTE_RF:
osgParticle::ParticleProcessor::RELATIVE_RF);
_emitter->setStartTime(_startTime);
_emitter->setLifeTime(_emitterDuration);
_emitter->setEndless(false);
osgParticle::RandomRateCounter* counter = dynamic_cast<osgParticle::RandomRateCounter*>(_emitter->getCounter());
if (counter)
{
counter->setRateRange(2000*_intensity,2000*_intensity);
}
osgParticle::SectorPlacer* placer = dynamic_cast<osgParticle::SectorPlacer*>(_emitter->getPlacer());
if (placer)
{
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
}
osgParticle::RadialShooter* shooter = dynamic_cast<osgParticle::RadialShooter*>(_emitter->getShooter());
if (shooter)
{
shooter->setThetaRange(0.0f, osg::PI_2);
shooter->setInitialSpeedRange(1.0f*_scale,5.0f*_scale);
}
}
// set up program.
if (!_program)
{
_program = new osgParticle::FluidProgram;
}
if (_program.valid())
{
_program->setParticleSystem(_particleSystem.get());
_program->setWind(_wind);
}
}

128
src/osgParticle/ExplosionEffect.cpp
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@@ -35,6 +35,9 @@ ExplosionEffect::ExplosionEffect(const osg::Vec3& position, float scale, float i
_scale = scale;
_intensity = intensity;
_emitterDuration = 1.0;
_particleDuration = 0.5+0.1*_scale;
buildEffect();
}
@@ -46,83 +49,98 @@ ExplosionEffect::ExplosionEffect(const ExplosionEffect& copy, const osg::CopyOp&
void ExplosionEffect::setDefaults()
{
ParticleEffect::setDefaults();
_emitterDuration = 1.0;
_particleDuration = 0.5+0.1*_scale;
}
void ExplosionEffect::setUpEmitterAndProgram()
{
osgParticle::ParticleSystem *ps = new osgParticle::ParticleSystem;
ps->setDefaultAttributes("Images/particle.rgb", false, false);
_particleSystem = ps;
//_particleSystem->setUseIntialViewMatrix(true);
// set up the emitter
// set up particle system
if (!_particleSystem)
{
osgParticle::ModularEmitter *emitter = new osgParticle::ModularEmitter;
emitter->setParticleSystem(ps);
emitter->setReferenceFrame(osgParticle::ParticleProcessor::ABSOLUTE_RF);
_particleSystem = new osgParticle::ParticleSystem;
}
osgParticle::Particle ptemplate;
if (_particleSystem.valid())
{
_particleSystem->setDefaultAttributes("Images/smoke.rgb", false, false);
ptemplate.setLifeTime(3); // 3 seconds of life
osgParticle::Particle& ptemplate = _particleSystem->getDefaultParticleTemplate();
ptemplate.setLifeTime(_particleDuration);
float radius = 0.4f*_scale;
float density = 1.2f; // 1.0kg/m^3
// the following ranges set the envelope of the respective
// graphical properties in time.
ptemplate.setSizeRange(osgParticle::rangef(0.75f, 3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.0f, 1.0f));
ptemplate.setSizeRange(osgParticle::rangef(radius*0.75f, radius*3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.1f, 1.0f));
ptemplate.setColorRange(osgParticle::rangev4(
osg::Vec4(1, 1.0f, 0.0f, 1.0f),
osg::Vec4(0.5, 0.5f, 0.0f, 0.0f)));
osg::Vec4(1.0f, 0.8f, 0.2f, 1.0f),
osg::Vec4(1.0f, 0.4f, 0.1f, 0.0f)));
// these are physical properties of the particle
ptemplate.setRadius(0.1f*_scale); // 5 cm wide particles
ptemplate.setMass(1.0f*_scale); // 1kg heavy
ptemplate.setRadius(radius); // 5 cm wide particles
ptemplate.setMass(density*osg::PI*4.0f*radius*radius*radius/3.0f);
// assign the particle template to the system.
ps->setDefaultParticleTemplate(ptemplate);
}
//osgParticle::LimitedDurationRandomRateCounter* counter = new osgParticle::LimitedDurationRandomRateCounter;
osgParticle::RandomRateCounter* counter = new osgParticle::RandomRateCounter;
counter->setRateRange(2000*_intensity,2000*_intensity); // generate 1000 particles per second
emitter->setCounter(counter);
osgParticle::SectorPlacer* placer = new osgParticle::SectorPlacer;
placer->setCenter(_position);
placer->setRadiusRange(0.0f,1.0f*_scale);
emitter->setPlacer(placer);
osgParticle::RadialShooter* shooter = new osgParticle::RadialShooter;
shooter->setThetaRange(0.0f, osg::PI_2);
shooter->setInitialSpeedRange(5.0f*_scale,30.0f*_scale);
emitter->setShooter(shooter);
emitter->setStartTime(_startTime);
emitter->setResetTime(5.0f);
emitter->setLifeTime(0.1f);
emitter->setEndless(false);
_emitter = emitter;
// set up emitter
if (!_emitter)
{
_emitter = new osgParticle::ModularEmitter;
_emitter->setCounter(new osgParticle::RandomRateCounter);
_emitter->setPlacer(new osgParticle::SectorPlacer);
_emitter->setShooter(new osgParticle::RadialShooter);
}
if (_emitter.valid())
{
_emitter->setParticleSystem(_particleSystem.get());
_emitter->setReferenceFrame(_useLocalParticleSystem?
osgParticle::ParticleProcessor::ABSOLUTE_RF:
osgParticle::ParticleProcessor::RELATIVE_RF);
_emitter->setStartTime(_startTime);
_emitter->setLifeTime(_emitterDuration);
_emitter->setEndless(false);
osgParticle::RandomRateCounter* counter = dynamic_cast<osgParticle::RandomRateCounter*>(_emitter->getCounter());
if (counter)
{
counter->setRateRange(50*_intensity,100*_intensity);
}
osgParticle::SectorPlacer* placer = dynamic_cast<osgParticle::SectorPlacer*>(_emitter->getPlacer());
if (placer)
{
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
}
osgParticle::RadialShooter* shooter = dynamic_cast<osgParticle::RadialShooter*>(_emitter->getShooter());
if (shooter)
{
shooter->setThetaRange(0.0f, osg::PI_2);
shooter->setInitialSpeedRange(1.0f*_scale,10.0f*_scale);
}
}
// set up the program
{
osgParticle::ModularProgram *program = new osgParticle::ModularProgram;
program->setParticleSystem(ps);
// create an operator that simulates the gravity acceleration.
osgParticle::AccelOperator *op1 = new osgParticle::AccelOperator;
op1->setToGravity();
program->addOperator(op1);
// let's add a fluid operator to simulate air friction.
osgParticle::FluidFrictionOperator *op3 = new osgParticle::FluidFrictionOperator;
op3->setFluidToAir();
program->addOperator(op3);
_program = program;
if (!_program)
{
_program = new osgParticle::FluidProgram;
}
if (_program.valid())
{
_program->setParticleSystem(_particleSystem.get());
_program->setWind(_wind);
}
}

120
src/osgParticle/FireEffect.cpp
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@@ -33,7 +33,10 @@ FireEffect::FireEffect(const osg::Vec3& position, float scale, float intensity)
_position = position;
_scale = scale;
_intensity = intensity;
_emitterDuration = 60.0;
_particleDuration = 0.5+0.1*_scale;
buildEffect();
}
@@ -45,78 +48,97 @@ FireEffect::FireEffect(const FireEffect& copy, const osg::CopyOp& copyop):
void FireEffect::setDefaults()
{
ParticleEffect::setDefaults();
_emitterDuration = 60.0;
_particleDuration = 0.5+0.1*_scale;
}
void FireEffect::setUpEmitterAndProgram()
{
osgParticle::ParticleSystem *ps = new osgParticle::ParticleSystem;
ps->setDefaultAttributes("Images/smoke.rgb", true, false);
_particleSystem = ps;
// _particleSystem->setUseIntialViewMatrix(true);
// set up the emitter
// set up particle system
if (!_particleSystem)
{
osgParticle::ModularEmitter *emitter = new osgParticle::ModularEmitter;
emitter->setParticleSystem(ps);
emitter->setReferenceFrame(osgParticle::ParticleProcessor::ABSOLUTE_RF);
_particleSystem = new osgParticle::ParticleSystem;
}
if (_particleSystem.valid())
{
_particleSystem->setDefaultAttributes("Images/smoke.rgb", false, false);
osgParticle::Particle ptemplate;
osgParticle::Particle& ptemplate = _particleSystem->getDefaultParticleTemplate();
ptemplate.setLifeTime(2); // 3 seconds of life
ptemplate.setLifeTime(_particleDuration);
float radius = 0.25f*_scale;
float density = 0.5f; // 1.0kg/m^3
// the following ranges set the envelope of the respective
// graphical properties in time.
ptemplate.setSizeRange(osgParticle::rangef(0.75f, 3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.0f, 1.0f));
ptemplate.setSizeRange(osgParticle::rangef(radius*0.75f, radius*3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.1f, 1.0f));
ptemplate.setColorRange(osgParticle::rangev4(
osg::Vec4(1, 1.0f, 0.2f, 1.0f),
osg::Vec4(1, 0.0f, 0.f, 0.0f)));
// these are physical properties of the particle
ptemplate.setRadius(0.05f*_scale); // 5 cm wide particles
ptemplate.setMass(0.01f*_scale); // 10g heavy
ptemplate.setRadius(radius); // 5 cm wide particles
ptemplate.setMass(density*osg::PI*4.0f*radius*radius*radius/3.0f);
// assign the particle template to the system.
ps->setDefaultParticleTemplate(ptemplate);
osgParticle::RandomRateCounter* counter = new osgParticle::RandomRateCounter;
counter->setRateRange(1*_intensity*_scale,10*_intensity*_scale); // generate 1000 particles per second
emitter->setCounter(counter);
osgParticle::SectorPlacer* placer = new osgParticle::SectorPlacer;
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
emitter->setPlacer(placer);
osgParticle::RadialShooter* shooter = new osgParticle::RadialShooter;
shooter->setThetaRange(0.0f, osg::PI_4);
shooter->setInitialSpeedRange(0.0f*_scale,0.0f*_scale);
emitter->setShooter(shooter);
emitter->setStartTime(_startTime);
_emitter = emitter;
}
// set up the program
// set up emitter
if (!_emitter)
{
osgParticle::ModularProgram *program = new osgParticle::ModularProgram;
program->setParticleSystem(ps);
_emitter = new osgParticle::ModularEmitter;
_emitter->setCounter(new osgParticle::RandomRateCounter);
_emitter->setPlacer(new osgParticle::SectorPlacer);
_emitter->setShooter(new osgParticle::RadialShooter);
}
// create an operator that simulates the gravity acceleration.
osgParticle::AccelOperator *op1 = new osgParticle::AccelOperator;
op1->setToGravity(-0.2);
program->addOperator(op1);
if (_emitter.valid())
{
_emitter->setParticleSystem(_particleSystem.get());
_emitter->setReferenceFrame(_useLocalParticleSystem?
osgParticle::ParticleProcessor::ABSOLUTE_RF:
osgParticle::ParticleProcessor::RELATIVE_RF);
// let's add a fluid operator to simulate air friction.
osgParticle::FluidFrictionOperator *op3 = new osgParticle::FluidFrictionOperator;
op3->setFluidToAir();
program->addOperator(op3);
_emitter->setStartTime(_startTime);
_emitter->setLifeTime(_emitterDuration);
_emitter->setEndless(false);
// add the program to the scene graph
_program = program;
osgParticle::RandomRateCounter* counter = dynamic_cast<osgParticle::RandomRateCounter*>(_emitter->getCounter());
if (counter)
{
counter->setRateRange(10*_intensity,15*_intensity);
}
osgParticle::SectorPlacer* placer = dynamic_cast<osgParticle::SectorPlacer*>(_emitter->getPlacer());
if (placer)
{
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
}
osgParticle::RadialShooter* shooter = dynamic_cast<osgParticle::RadialShooter*>(_emitter->getShooter());
if (shooter)
{
shooter->setThetaRange(0.0f, osg::PI_4);
shooter->setInitialSpeedRange(0.0f*_scale,0.0f*_scale);
}
}
// set up program.
if (!_program)
{
_program = new osgParticle::FluidProgram;
}
if (_program.valid())
{
_program->setParticleSystem(_particleSystem.get());
_program->setWind(_wind);
}
}

2
src/osgParticle/FluidFrictionOperator.cpp
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@@ -30,7 +30,7 @@ osgParticle::FluidFrictionOperator::FluidFrictionOperator(const FluidFrictionOpe
void osgParticle::FluidFrictionOperator::operate(Particle *P, double dt)
{
float r = (ovr_rad_ > 0)? ovr_rad_ : P->getRadius();
osg::Vec3 v = P->getVelocity();
osg::Vec3 v = P->getVelocity()-_wind;
float vm = v.normalize();
float R = A_ * r * vm + B_ * r * r * vm * vm;

2
src/osgParticle/GNUmakefile
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@@ -4,9 +4,11 @@ include $(TOPDIR)/Make/makedefs
CXXFILES =\
Emitter.cpp\
ExplosionEffect.cpp\
ExplosionDebriEffect.cpp\
SmokeEffect.cpp\
FireEffect.cpp\
FluidFrictionOperator.cpp\
FluidProgram.cpp\
ModularEmitter.cpp\
ModularProgram.cpp\
MultiSegmentPlacer.cpp\

78
src/osgParticle/ParticleEffect.cpp
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@@ -18,44 +18,99 @@
using namespace osgParticle;
ParticleEffect::ParticleEffect(const ParticleEffect& copy, const osg::CopyOp& copyop):
osg::Group(copy,copyop)/*,
osg::Group(copy,copyop),/*,
_particleSystem(copy._particleSystem.valid()?copy._particleSystem->clone():0)*/
_useLocalParticleSystem(copy._useLocalParticleSystem),
_scale(copy._scale),
_intensity(copy._intensity),
_startTime(copy._startTime),
_emitterDuration(copy._emitterDuration),
_particleDuration(copy._particleDuration),
_wind(copy._wind)
{
}
void ParticleEffect::setUseLocalParticleSystem(bool local)
{
if (_useLocalParticleSystem==local) return;
_useLocalParticleSystem = local;
buildEffect();
}
void ParticleEffect::setPosition(const osg::Vec3& position)
{
if (_position==position) return;
_position = position;
setUpEmitterAndProgram();
}
void ParticleEffect::setScale(float scale)
{
if (_scale==scale) return;
_scale = scale;
setUpEmitterAndProgram();
}
void ParticleEffect::setIntensity(float intensity)
{
if (_intensity==intensity) return;
_intensity = intensity;
setUpEmitterAndProgram();
}
void ParticleEffect::setStartTime(double startTime)
{
_startTime = startTime;
if (_startTime==startTime) return;
_startTime =startTime;
setUpEmitterAndProgram();
}
void ParticleEffect::setDuration(double duration)
void ParticleEffect::setEmitterDuration(double duration)
{
_duration = duration;
if (_emitterDuration==duration) return;
_emitterDuration = duration;
setUpEmitterAndProgram();
}
void ParticleEffect::setParticleDuration(double duration)
{
if (_particleDuration==duration) return;
_particleDuration = duration;
setUpEmitterAndProgram();
}
void ParticleEffect::setWind(const osg::Vec3& wind)
{
if (_wind==wind) return;
_wind = wind;
setUpEmitterAndProgram();
}
void ParticleEffect::setParticleSystem(ParticleSystem* ps)
{
if (_particleSystem==ps) return;
_particleSystem = ps;
buildEffect();
}
void ParticleEffect::setDefaults()
{
_useLocalParticleSystem = true;
_scale = 1.0f;
_intensity = 1.0f;
_startTime = 0.0;
_duration = 1.0;
_direction.set(0.0f,0.0f,1.0f);
_emitterDuration = 1.0;
_particleDuration = 1.0;
_wind.set(0.0f,0.0f,0.0f);
}
void ParticleEffect::buildEffect()
@@ -83,9 +138,12 @@ void ParticleEffect::buildEffect()
psu->addParticleSystem(particleSystem);
addChild(psu);
// add the geode to the scene graph
osg::Geode *geode = new osg::Geode;
geode->addDrawable(particleSystem);
addChild(geode);
if (_useLocalParticleSystem)
{
// add the geode to the scene graph
osg::Geode *geode = new osg::Geode;
geode->addDrawable(particleSystem);
addChild(geode);
}
}

117
src/osgParticle/SmokeEffect.cpp
View File

@@ -15,8 +15,6 @@
#include <osgParticle/RandomRateCounter>
#include <osgParticle/RadialShooter>
#include <osgParticle/AccelOperator>
#include <osgParticle/FluidFrictionOperator>
#include <osgParticle/SectorPlacer>
#include <osgParticle/ParticleSystemUpdater>
@@ -31,6 +29,9 @@ SmokeEffect::SmokeEffect(const osg::Vec3& position, float scale, float intensity
_position = position;
_scale = scale;
_intensity = intensity;
_emitterDuration = 65.0;
_particleDuration = 5.0*_scale;
buildEffect();
}
@@ -43,78 +44,94 @@ SmokeEffect::SmokeEffect(const SmokeEffect& copy, const osg::CopyOp& copyop):
void SmokeEffect::setDefaults()
{
ParticleEffect::setDefaults();
_emitterDuration = 65.0;
_particleDuration = 5.0*_scale;
}
void SmokeEffect::setUpEmitterAndProgram()
{
osgParticle::ParticleSystem *ps = new osgParticle::ParticleSystem;
ps->setDefaultAttributes("Images/smoke.rgb", false, false);
_particleSystem = ps;
// _particleSystem->setUseIntialViewMatrix(true);
// set up the emitter
// set up particle system
if (!_particleSystem)
{
osgParticle::ModularEmitter *emitter = new osgParticle::ModularEmitter;
emitter->setParticleSystem(ps);
emitter->setReferenceFrame(osgParticle::ParticleProcessor::ABSOLUTE_RF);
_particleSystem = new osgParticle::ParticleSystem;
}
if (_particleSystem.valid())
{
_particleSystem->setDefaultAttributes("Images/smoke.rgb", false, false);
osgParticle::Particle ptemplate;
osgParticle::Particle& ptemplate = _particleSystem->getDefaultParticleTemplate();
ptemplate.setLifeTime(5*_scale);
ptemplate.setLifeTime(10*_scale);
float radius = 0.5f*_scale;
float density = 1.0f; // 1.0kg/m^3
// the following ranges set the envelope of the respective
// graphical properties in time.
ptemplate.setSizeRange(osgParticle::rangef(0.75f, 3.0f));
ptemplate.setSizeRange(osgParticle::rangef(radius*0.75f, radius*3.0f));
ptemplate.setAlphaRange(osgParticle::rangef(0.1f, 1.0f));
ptemplate.setColorRange(osgParticle::rangev4(
osg::Vec4(1, 1.0f, 1.0f, 1.0f),
osg::Vec4(1, 1.0f, 1.f, 0.0f)));
// these are physical properties of the particle
ptemplate.setRadius(0.05f*_scale); // 5 cm wide particles
ptemplate.setMass(0.01f*_scale); // 10g heavy
ptemplate.setRadius(radius); // 5 cm wide particles
ptemplate.setMass(density*osg::PI*4.0f*radius*radius*radius/3.0f);
// assign the particle template to the system.
ps->setDefaultParticleTemplate(ptemplate);
osgParticle::RandomRateCounter* counter = new osgParticle::RandomRateCounter;
counter->setRateRange(1*_intensity*_scale,2*_intensity*_scale); // generate 1000 particles per second
emitter->setCounter(counter);
osgParticle::SectorPlacer* placer = new osgParticle::SectorPlacer;
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
emitter->setPlacer(placer);
osgParticle::RadialShooter* shooter = new osgParticle::RadialShooter;
shooter->setThetaRange(0.0f, osg::PI_4);
shooter->setInitialSpeedRange(0.0f*_scale,0.0f*_scale);
emitter->setShooter(shooter);
emitter->setStartTime(0.0f);
_emitter = emitter;
}
// set up the program
// set up emitter
if (!_emitter)
{
osgParticle::ModularProgram *program = new osgParticle::ModularProgram;
program->setParticleSystem(ps);
_emitter = new osgParticle::ModularEmitter;
_emitter->setCounter(new osgParticle::RandomRateCounter);
_emitter->setPlacer(new osgParticle::SectorPlacer);
_emitter->setShooter(new osgParticle::RadialShooter);
}
// create an operator that simulates the gravity acceleration.
osgParticle::AccelOperator *op1 = new osgParticle::AccelOperator;
op1->setToGravity(-0.1);
program->addOperator(op1);
if (_emitter.valid())
{
_emitter->setParticleSystem(_particleSystem.get());
_emitter->setReferenceFrame(_useLocalParticleSystem?
osgParticle::ParticleProcessor::ABSOLUTE_RF:
osgParticle::ParticleProcessor::RELATIVE_RF);
// let's add a fluid operator to simulate air friction.
osgParticle::FluidFrictionOperator *op3 = new osgParticle::FluidFrictionOperator;
op3->setFluidToAir();
program->addOperator(op3);
_emitter->setStartTime(_startTime);
_emitter->setLifeTime(_emitterDuration);
_emitter->setEndless(false);
_program = program;
osgParticle::RandomRateCounter* counter = dynamic_cast<osgParticle::RandomRateCounter*>(_emitter->getCounter());
if (counter)
{
counter->setRateRange(3*_intensity,5*_intensity);
}
osgParticle::SectorPlacer* placer = dynamic_cast<osgParticle::SectorPlacer*>(_emitter->getPlacer());
if (placer)
{
placer->setCenter(_position);
placer->setRadiusRange(0.0f*_scale,0.25f*_scale);
}
osgParticle::RadialShooter* shooter = dynamic_cast<osgParticle::RadialShooter*>(_emitter->getShooter());
if (shooter)
{
shooter->setThetaRange(0.0f, osg::PI_4);
shooter->setInitialSpeedRange(0.0f*_scale,0.0f*_scale);
}
}
// set up program.
if (!_program)
{
_program = new osgParticle::FluidProgram;
}
if (_program.valid())
{
_program->setParticleSystem(_particleSystem.get());
_program->setWind(_wind);
}
}