创建烟雾的例子效果，并附在飞机上；

#include <osgParticle/PrecipitationEffect>
#include <osgParticle/Particle>#include <osgParticle/LinearInterpolator>
#include <osgParticle/ParticleSystem>
#include < osgParticle/RandomRateCounter>
#include <osgParticle/PointPlacer>
#include <osgParticle/RadialShooter>
#include <osgParticle/ModularEmitter>
#include <osgParticle/ParticleSystemUpdater>
#include < osgParticle/ModularProgram>//创建火球(燃烧)
void createFireBall(osg::MatrixTransform *smokeNode)
{// 创建粒子对象，设置其属性并交由粒子系统使用。osgParticle::Particle particleTempalte;particleTempalte.setShape(osgParticle::Particle::QUAD);particleTempalte.setLifeTime(1.5); // 单位：秒particleTempalte.setSizeRange(osgParticle::rangef(3.0f, 1.0f)); // 单位：米particleTempalte.setAlphaRange(osgParticle::rangef(1, 0));particleTempalte.setColorRange(osgParticle::rangev4(osg::Vec4(1.0f, 0.2f, 0.0f, 1.0f),//0.1f,0.3f,0.4f,1.0fosg::Vec4(0.1f, 0.1f, 0.1f, 0)//0.95f,0.75f,0,1(1,1,1,1)));particleTempalte.setPosition(osg::Vec3(0.0f, 0.0f, 0.0f));particleTempalte.setVelocity(osg::Vec3(0.0f, 0.0f, 0.0f));particleTempalte.setMass(0.1f); //单位：千克particleTempalte.setRadius(0.2f);particleTempalte.setSizeInterpolator(new osgParticle::LinearInterpolator);particleTempalte.setAlphaInterpolator(new osgParticle::LinearInterpolator);particleTempalte.setColorInterpolator(new osgParticle::LinearInterpolator);// 创建并初始化粒子系统。osgParticle::ParticleSystem *particleSystem = new osgParticle::ParticleSystem;particleSystem->setDataVariance(osg::Node::STATIC);// 设置材质，是否放射粒子，以及是否使用光照。particleSystem->setDefaultAttributes("G:\\YCThirdParty\\Osg\\data\\Images\\smoke.rgb", true, false);osg::Geode *geode = new osg::Geode;geode->addDrawable(particleSystem);smokeNode->addChild(geode);//设置为粒子系统的缺省粒子对象。particleSystem->setDefaultParticleTemplate(particleTempalte);//获取放射极中缺省计数器的句柄，调整每帧增加的新粒子数目osgParticle::RandomRateCounter *particleGenerateRate = new osgParticle::RandomRateCounter();particleGenerateRate->setRateRange(30, 50);// 每秒新生成的粒子范围particleGenerateRate->setDataVariance(osg::Node::DYNAMIC);// 自定义一个放置器，这里创建并初始化一个点放置器osgParticle::PointPlacer * particlePlacer = new osgParticle::PointPlacer;particlePlacer->setCenter(osg::Vec3(0.0f, 0.0f, 0.0f));particlePlacer->setDataVariance(osg::Node::DYNAMIC);// 自定义一个弧度发射器osgParticle::RadialShooter* particleShooter = new osgParticle::RadialShooter;// 设置发射器的属性particleShooter->setDataVariance(osg::Node::DYNAMIC);particleShooter->setThetaRange(-0.1f, 0.1f);// 弧度值，与Z 轴夹角particleShooter->setPhiRange(-0.1f, 0.1f);particleShooter->setInitialSpeedRange(5, 7.5f);//单位：米/秒//创建标准放射极对象osgParticle::ModularEmitter *emitter = new osgParticle::ModularEmitter;emitter->setDataVariance(osg::Node::DYNAMIC);emitter->setCullingActive(false);// 将放射极对象与粒子系统关联。emitter->setParticleSystem(particleSystem);// 设置计数器emitter->setCounter(particleGenerateRate);// 设置放置器emitter->setPlacer(particlePlacer);// 设置发射器emitter->setShooter(particleShooter);// 把放射极添加为变换节点smokeNode->addChild(emitter);// 添加更新器，以实现每帧的粒子管理。osgParticle::ParticleSystemUpdater *particleSystemUpdater = new osgParticle::ParticleSystemUpdater;// 将更新器与粒子系统对象关联。particleSystemUpdater->addParticleSystem(particleSystem);// 将更新器节点添加到场景中。smokeNode->addChild(particleSystemUpdater);// 创建标准编程器对象并与粒子系统相关联。osgParticle::ModularProgram *particleMoveProgram = new osgParticle::ModularProgram;particleMoveProgram->setParticleSystem(particleSystem);// 最后，将编程器添加到场景中。smokeNode->addChild(particleMoveProgram);
}//创建浓烟
void createDarkSmoke(osg::MatrixTransform *smokeNode)
{// 创建粒子对象，设置其属性并交由粒子系统使用。osgParticle::Particle particleTempalte;particleTempalte.setShape(osgParticle::Particle::QUAD);particleTempalte.setLifeTime(10); // 单位：秒particleTempalte.setSizeRange(osgParticle::rangef(1.0f, 12.0f)); // 单位：米particleTempalte.setAlphaRange(osgParticle::rangef(1, 0));particleTempalte.setColorRange(osgParticle::rangev4(osg::Vec4(0.0f, 0.0f, 0.0f, 0.5f),//(0.1f,0.1f,0.1f,0.5f)osg::Vec4(0.5f, 0.5f, 0.5f, 1.5f)//0.95f,0.75f,0,1));particleTempalte.setPosition(osg::Vec3(0.0f, 0.0f, 0.0f));particleTempalte.setVelocity(osg::Vec3(0.0f, 0.0f, 0.0f));particleTempalte.setMass(0.1f); //单位：千克particleTempalte.setRadius(0.2f);particleTempalte.setSizeInterpolator(new osgParticle::LinearInterpolator);particleTempalte.setAlphaInterpolator(new osgParticle::LinearInterpolator);particleTempalte.setColorInterpolator(new osgParticle::LinearInterpolator);// 创建并初始化粒子系统。osgParticle::ParticleSystem *particleSystem = new osgParticle::ParticleSystem;particleSystem->setDataVariance(osg::Node::STATIC);// 设置材质，是否放射粒子，以及是否使用光照。particleSystem->setDefaultAttributes("G:\\YCThirdParty\\Osg\\data\\Images\\smoke.rgb", false, false);osg::Geode *geode = new osg::Geode;geode->addDrawable(particleSystem);smokeNode->addChild(geode);//设置为粒子系统的缺省粒子对象。particleSystem->setDefaultParticleTemplate(particleTempalte);//获取放射极中缺省计数器的句柄，调整每帧增加的新粒//子数目osgParticle::RandomRateCounter *particleGenerateRate = new osgParticle::RandomRateCounter();particleGenerateRate->setRateRange(30, 50);// 每秒新生成的粒子范围particleGenerateRate->setDataVariance(osg::Node::DYNAMIC);// 自定义一个放置器，这里我们创建并初始化一个点放置器osgParticle::PointPlacer * particlePlacer = new osgParticle::PointPlacer;particlePlacer->setCenter(osg::Vec3(0.0f, 0.0f, 0.05f));particlePlacer->setDataVariance(osg::Node::DYNAMIC);// 自定义一个弧度发射器osgParticle::RadialShooter* particleShooter = new osgParticle::RadialShooter;// 设置发射器的属性particleShooter->setDataVariance(osg::Node::DYNAMIC);particleShooter->setThetaRange(-0.1f, 0.1f);// 弧度值，与Z 轴夹角0.392699fparticleShooter->setPhiRange(-0.1f, 0.1f);particleShooter->setInitialSpeedRange(10, 15);//单位：米/秒//创建标准放射极对象osgParticle::ModularEmitter *emitter = new osgParticle::ModularEmitter;emitter->setDataVariance(osg::Node::DYNAMIC);emitter->setCullingActive(false);// 将放射极对象与粒子系统关联。emitter->setParticleSystem(particleSystem);// 设置计数器emitter->setCounter(particleGenerateRate);// 设置放置器emitter->setPlacer(particlePlacer);// 设置发射器emitter->setShooter(particleShooter);// 把放射极添加为变换节点smokeNode->addChild(emitter);// 添加更新器，以实现每帧的粒子管理。osgParticle::ParticleSystemUpdater *particleSystemUpdater = new osgParticle::ParticleSystemUpdater;// 将更新器与粒子系统对象关联。particleSystemUpdater->addParticleSystem(particleSystem);// 将更新器节点添加到场景中。smokeNode->addChild(particleSystemUpdater);osgParticle::ModularProgram *particleMoveProgram = new osgParticle::ModularProgram;particleMoveProgram->setParticleSystem(particleSystem);// 最后，将编程器添加到场景中。smokeNode->addChild(particleMoveProgram);
}void main()
{osg::ref_ptr<osg::Group> root = new osg::Group();osg::Node* flightNode = osgDB::readNodeFile("cessna.osg");//需要经模型放在项目根目录下(而不是在cpp所在目录)if (!flightNode){std::cout << "no flight" << std::endl;return  ;}
//飞机变换节点osg::MatrixTransform * flightTransform = new osg::MatrixTransform();flightTransform->addChild(flightNode);root ->addChild(flightTransform);//引擎烟雾osg::MatrixTransform* fireballAndSmoke = new osg::MatrixTransform();createFireBall(fireballAndSmoke);fireballAndSmoke->setMatrix(osg::Matrix::rotate(-osg::PI / 2, 1, 0, 0)*osg::Matrix::translate(-8, -10, -3));flightTransform->addChild(fireballAndSmoke);createDarkSmoke(fireballAndSmoke);
osgViewer::Viewer viewer;osgUtil::Simplifier simplifier(0.3f, 4.0f);osgUtil::Optimizer optimzer;optimzer.optimize(root.get());viewer.setSceneData(root.get());//添加一个事件句柄 相当于添加一个响应 响应鼠标或是键盘 响应L键(控制灯光开关)viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));//窗口大小变化事件 添加窗口大小改变的句柄 这里响应的是F键viewer.addEventHandler(new osgViewer::WindowSizeHandler);//添加一些常用状态设置  添加常用的状态操作，这里会响应S键、W键等等 viewer.addEventHandler(new osgViewer::StatsHandler);viewer.realize();viewer.run();
}

效果如下：

image.png

单独将“火球”“浓烟”以.osg形式输出

void main()
{osg::ref_ptr<osg::Group> root = new osg::Group();osg::MatrixTransform * flightTransform = new osg::MatrixTransform();root ->addChild(flightTransform);//引擎烟雾osg::MatrixTransform* fireballAndSmoke = new osg::MatrixTransform();createFireBall(fireballAndSmoke);fireballAndSmoke->setMatrix(osg::Matrix::rotate(-osg::PI / 2, 1, 0, 0)*osg::Matrix::translate(-8, -10, -3));flightTransform->addChild(fireballAndSmoke);createDarkSmoke(fireballAndSmoke);osgDB::writeNodeFile(*(root.get()), "MyScene.osg");
}

验证输出的osg烟雾效果：

void main()
{osg::ref_ptr<osg::Group> root = new osg::Group();osg::Node* flightNode = osgDB::readNodeFile("MyScene.osg");if (!flightNode){std::cout << "no flight" << std::endl;return  ;}osg::MatrixTransform * flightTransform = new osg::MatrixTransform();flightTransform->addChild(flightNode);root ->addChild(flightTransform);osgViewer::Viewer viewer;osgUtil::Simplifier simplifier(0.3f, 4.0f);osgUtil::Optimizer optimzer;optimzer.optimize(root.get());viewer.setSceneData(root.get());//添加一个事件句柄 相当于添加一个响应 响应鼠标或是键盘 响应L键(控制灯光开关)viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));//窗口大小变化事件 添加窗口大小改变的句柄 这里响应的是F键viewer.addEventHandler(new osgViewer::WindowSizeHandler);//添加一些常用状态设置  添加常用的状态操作，这里会响应S键、W键等等 viewer.addEventHandler(new osgViewer::StatsHandler);viewer.realize();viewer.run();
}

效果展示：

image.png