OsgOsg实例烟雾粒子效果(Qt5.14.2+osgEarht3.6.5+win10)No4Particle

相关资料：

https://www.jianshu.com/p/6c37c4334c8f    OSG仿真案例（4）——创建烟雾粒子效果

代码实例：

.pro

QT       += core gui widgets
TARGET = TestOsgQt
TEMPLATE = app
DEFINES += QT_DEPRECATED_WARNINGS
CONFIG += c++11

SOURCES += \
        main.cpp

HEADERS +=

OsgDir = D:\\RuanJian\\osg365R
CONFIG(release, debug|release) {
        LIBS += -L$${OsgDir}/lib/ -losgDB -losgViewer -lOpenThreads -losgAnimation -losg \
                                  -losgEarth -losgEarthAnnotation -losgEarthFeatures -losgEarthSymbology -losgEarthUtil \
                                  -losgQOpenGL -losgUtil -losgText -losgTerrain -losgSim \
                                  -losgShadow -losgParticle -losgManipulator -losgGA -losgFX \
                                  -losgWidget
} else {
        LIBS += -L$${OsgDir}/debug/lib/ -losgDBd -losgViewerd -lOpenThreadsd -losgAnimationd -losgd \
                                  -losgEarthd -losgEarthAnnotationd -losgEarthFeaturesd -losgEarthSymbologyd -losgEarthUtild \
                                  -losgQOpenGLd -losgUtild -losgTextd -losgTerraind -losgSimd \
                                  -losgShadowd -losgParticled -losgManipulatord -losgGAd -losgFXd \
}


INCLUDEPATH += $${OsgDir}/include
DEPENDPATH += $${OsgDir}/include

main.cpp

#include <QApplication>

#include <osg/Node>
#include <osg/Group>
#include <osg/Geode>
#include <osg/Geometry>
#include <osg/Texture2D>
#include <osg/StateSet>
#include <osg/PositionAttitudeTransform>
#include <osgViewer/Viewer>
#include <osgDB/ReadFile>
#include <osgParticle/PrecipitationEffect>
// 雨雪效果
#include <osg/MatrixTransform>
// 粒子效果
#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>
#include <osgUtil/Optimizer>
#include <osgUtil/Simplifier>
// 雾
#include <osg/Fog>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <osg/StateSet>
#include <osg/StateAttribute>
#include <osgViewer/ViewerEventHandlers>
#include <osgWidget/ViewerEventHandlers>

//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,1.0f
        osg::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0.392699f
    particleShooter->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);
}

int main(int argc, char *argv[])
{
    osg::Group* root = new osg::Group();
    // ------------------粒子效果-----------------------
    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);

    osgUtil::Simplifier simplifier(0.3f, 4.0f);
    osgUtil::Optimizer optimzer;

    optimzer.optimize(root);
    // ------------------设置窗口------------------
    //最后，设置视窗类并进入仿真循环。
    osgViewer::Viewer viewer;
    //设置图形环境特性
    osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits();
    traits->x = 100;
    traits->y = 200;
    traits->width = 600;
    traits->height = 500;
    traits->windowDecoration = true;
    traits->doubleBuffer = true;
    traits->sharedContext = 0;
    //创建图形环境特性
    osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
    if (gc.valid())
    {
        osg::notify(osg::INFO)<<"  GraphicsWindow has been created successfully."<<std::endl;

        //清除窗口颜色及清除颜色和深度缓冲
        gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
        gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    }
    else
    {
        osg::notify(osg::NOTICE)<<"  GraphicsWindow has not been created successfully."<<std::endl;
    }
    //设置视口
    viewer.getCamera()->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
    //设置图形环境
    viewer.getCamera()->setGraphicsContext(gc.get());
    viewer.setSceneData( root );
    return viewer.run();
}