Osg-Osg实例实现环境雾效果(Qt5.14.2+osgEarht3.6.5+win10)-No5-EnvironmentFog-CFANZ编程社区

相关资料：

osg 雾效果

实现osgEarth三维仿真场景模型雾的效果的添加解决方法

代码实例：

.pro

1 QT       += core gui widgets
 2 TARGET = TestOsgQt
 3 TEMPLATE = app
 4 DEFINES += QT_DEPRECATED_WARNINGS
 5 CONFIG += c++11
 6 
 7 SOURCES += \
 8         main.cpp
 9 
10 HEADERS +=
11 
12 OsgDir = D:\\RuanJian\\osg365R
13 CONFIG(release, debug|release) {
14         LIBS += -L$${OsgDir}/lib/ -losgDB -losgViewer -lOpenThreads -losgAnimation -losg \
15                                   -losgEarth -losgEarthAnnotation -losgEarthFeatures -losgEarthSymbology -losgEarthUtil \
16                                   -losgQOpenGL -losgUtil -losgText -losgTerrain -losgSim \
17                                   -losgShadow -losgParticle -losgManipulator -losgGA -losgFX \
18                                   -losgWidget
19 } else {
20         LIBS += -L$${OsgDir}/debug/lib/ -losgDBd -losgViewerd -lOpenThreadsd -losgAnimationd -losgd \
21                                   -losgEarthd -losgEarthAnnotationd -losgEarthFeaturesd -losgEarthSymbologyd -losgEarthUtild \
22                                   -losgQOpenGLd -losgUtild -losgTextd -losgTerraind -losgSimd \
23                                   -losgShadowd -losgParticled -losgManipulatord -losgGAd -losgFXd \
24 }
25 
26 
27 INCLUDEPATH += $${OsgDir}/include
28 DEPENDPATH += $${OsgDir}/include

View Code

main.cpp

1     #include <QApplication>
  2 
  3 #include <osg/Node>
  4 #include <osg/Group>
  5 #include <osg/Geode>
  6 #include <osg/Geometry>
  7 #include <osg/Texture2D>
  8 #include <osg/StateSet>
  9 #include <osg/PositionAttitudeTransform>
 10 #include <osgViewer/Viewer>
 11 #include <osgDB/ReadFile>
 12 #include <osgParticle/PrecipitationEffect>
 13 // 雨雪效果
 14 #include <osg/MatrixTransform>
 15 // 粒子效果
 16 #include <osgParticle/PrecipitationEffect>
 17 #include <osgParticle/Particle>
 18 #include <osgParticle/LinearInterpolator>
 19 #include <osgParticle/ParticleSystem>
 20 #include <osgParticle/RandomRateCounter>
 21 #include <osgParticle/PointPlacer>
 22 #include <osgParticle/RadialShooter>
 23 #include <osgParticle/ModularEmitter>
 24 #include <osgParticle/ParticleSystemUpdater>
 25 #include <osgParticle/ModularProgram>
 26 #include <osgUtil/Optimizer>
 27 #include <osgUtil/Simplifier>
 28 // 雾
 29 #include <osg/Fog>
 30 #include <osgDB/ReadFile>
 31 #include <osgViewer/Viewer>
 32 #include <osg/StateSet>
 33 #include <osg/StateAttribute>
 34 #include <osgViewer/ViewerEventHandlers>
 35 #include <osgWidget/ViewerEventHandlers>
 36 
 37 class FogCallBack :    public osg::StateSet::Callback {
 38 public:
 39     FogCallBack();
 40     ~FogCallBack();
 41 
 42     virtual void operator() (osg::StateSet* ss, osg::NodeVisitor*nv)override;
 43 };
 44 
 45 FogCallBack::FogCallBack() {
 46 }
 47 
 48 
 49 FogCallBack::~FogCallBack() {
 50 }
 51 
 52 void FogCallBack::operator() (osg::StateSet* ss, osg::NodeVisitor*nv) {
 53     osg::Fog* fog = dynamic_cast<osg::Fog*>(ss->getAttribute(osg::StateAttribute::FOG));
 54     if (fog){
 55         float start = fog->getStart();
 56         if (start<fog->getEnd()){
 57             fog->setStart(start + 2.0);
 58         }
 59     }
 60 }
 61 
 62 int main(int argc, char *argv[])
 63 {
 64     // ---------------------雾-----------------------
 65     osg::ref_ptr<osg::Group> root = new osg::Group;
 66     osg::ref_ptr<osg::Node> cowNode = osgDB::readNodeFile("D:\\osgFiles\\lz.osg");
 67     root->addChild(cowNode);
 68 
 69     osg::ref_ptr<osg::Fog> fog = new osg::Fog;
 70     fog->setColor(osg::Vec4(1.0, 1.0, 1.0, 0.5));//设置颜色
 71     fog->setStart(1.0);//设置雾效的近距离
 72     fog->setEnd(2000.0);//设置雾效的远距离
 73     fog->setDensity(10.0);//设置雾效的密度
 74     fog->setMode(osg::Fog::LINEAR);//设置雾效的类型-线型
 75 
 76     root->getOrCreateStateSet()->setUpdateCallback(new FogCallBack);
 77     root->getOrCreateStateSet()->setAttributeAndModes(fog.get(), osg::StateAttribute::ON| osg::StateAttribute::OVERRIDE);
 78 
 79     osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();
 80     viewer->addEventHandler(new osgViewer::WindowSizeHandler());
 81     viewer->addEventHandler(new osgViewer::StatsHandler());
 82     // **********************************设置窗口*******************************
 83     //设置图形环境特性
 84     osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits();
 85     traits->x = 100;
 86     traits->y = 200;
 87     traits->width = 600;
 88     traits->height = 500;
 89     traits->windowDecoration = true;
 90     traits->doubleBuffer = true;
 91     traits->sharedContext = 0;
 92     // 创建图形环境特性
 93     osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
 94     if (gc.valid())
 95     {
 96         osg::notify(osg::INFO)<<"  GraphicsWindow has been created successfully."<<std::endl;
 97 
 98         //清除窗口颜色及清除颜色和深度缓冲
 99         gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
100         gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
101     }
102     else
103     {
104         osg::notify(osg::NOTICE)<<"  GraphicsWindow has not been created successfully."<<std::endl;
105     }
106     //设置视口
107     viewer->getCamera()->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
108     //设置图形环境
109     viewer->getCamera()->setGraphicsContext(gc.get());
110     viewer->setSceneData( root );
111     return viewer->run();
112 }