在vs下的osg的qt窗口开发例子以及一些注意事项
1.运行结果图：
2.注意事项
（1）qt插件的设定一定要选择好
（2）包含目录和库目录的设置（我的是release库，不是debug库，设置请注意）
（3）链接器的附加依赖项中的库添加
我的库有（release库，非debug）：
qtmain.lib
Qt5Core.lib
Qt5Gui.lib
Qt5Widgets.lib
OpenThreads.lib
osg.lib
osgDB.lib
osgUtil.lib
osgGA.lib
osgViewer.lib
osgText.lib
Qt5OpenGL.lib
opengl32.lib
glu32.lib
osgQt.lib
3.代码及其注释
1 #include <QtCore/QtCore> 2 #include <QtGui/QtGui>> 3 #include <osgDB/ReadFile> 4 #include <osgViewer/ViewerEventHandlers> 5 #include <osgViewer/Viewer> 6 #include <osgQt/GraphicsWindowQt> 7 #include <QtCore/QTimer> 8 #include <QtWidgets/QApplication> 9 #include <QtWidgets/QVBoxLayout> 10 #include <QtWidgets/QWidget> 11 #include <osgViewer/CompositeViewer> 12 #include <osgViewer/ViewerEventHandlers> 13 #include <osgGA/TrackballManipulator> 14 #include <osgQt/GraphicsWindowQt> 15 #include <iostream> 16 #include <osg/Node> 17 #include <osg/Geode> 18 #include <osg/Geometry> 19 #include <osg/ShapeDrawable> 20 #include <osg/Shape> 21 #include <osgGA/StateSetManipulator> 22 #include <osgQt/GraphicsWindowQt> 23 #include <QGLWidget> 24 #include <QtWidgets/QMainWindow> 25 #include "ui_qttest.h" 26 //创建球模型 27 osg::ref_ptr<osg::Node> createShape() 28 { 29 //几何组结点 30 osg::ref_ptr<osg::Geode> geode = new osg::Geode; 31 float radius = 0.08f; 32 float height = 0.1f; 33 osg::TessellationHints* hints = new osg::TessellationHints; 34 hints->setDetailRatio(0.5f); 35 geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), radius), hints)); 36 return geode.get(); 37 } 38 //创建渲染器的相机 39 osg::Camera* createCamera(int x, int y, int w, int h) 40 { 41 osg::DisplaySettings* ds = 42 osg::DisplaySettings::instance().get(); 43 osg::ref_ptr<osg::GraphicsContext::Traits> traits = 44 new osg::GraphicsContext::Traits; //声明一个嵌入窗口的变量，只要是有窗口必须使用此对象进行设置 45 traits->windowDecoration = false;//是否显示窗口的描述，默认为false不显示 46 traits->x = x;//设置显示的x坐标 47 traits->y = y;//设置显示的y坐标 48 traits->width = w;//设置窗口的宽度 49 traits->height = h;//设置窗口的高度 50 traits->doubleBuffer = true;//创建新的图形窗口是否使用双缓冲特性 51 osg::ref_ptr<osg::Camera> camera = new osg::Camera; 52 //任意图形子系统的抽象层接口，它提供了统一的图形设备操作函数，用来实现渲染结果和底层设备的交互 53 camera->setGraphicsContext( 54 new osgQt::GraphicsWindowQt(traits.get())); 55 //设置渲染器清除色 56 camera->setClearColor(osg::Vec4(0.2, 0.2, 0.6, 1.0)); 57 //图形输出设置当前视口 58 camera->setViewport(new osg::Viewport( 59 0, 0, traits->width, traits->height)); 60 //标识摄像机在世界坐标系下的位置 61 camera->setProjectionMatrixAsPerspective( 62 30.0f, static_cast<double>(traits->width) / 63 static_cast<double>(traits->height), 1.0f, 10000.0f); 64 return camera.release(); 65 } 66 67 class ViewerWidget : public QWidget 68 { 69 public: 70 ViewerWidget(osg::Camera* camera, osg::Group* scene) 71 //: QWidget() 72 { 73 _viewer.setCamera(camera); //将相机添加到渲染器中 74 _viewer.setSceneData(scene); //将模型添加到渲染器中 75 _viewer.addEventHandler(new osgViewer::StatsHandler); 76 //以下是创建了渲染器的一些操作 77 _viewer.setCameraManipulator(new osgGA::TrackballManipulator); 78 _viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);//创建为单线程 79 _viewer.addEventHandler(new osgGA::StateSetManipulator(_viewer.getCamera()->getOrCreateStateSet())); 80 //窗口大小变化事件 81 _viewer.addEventHandler(new osgViewer::WindowSizeHandler); 82 //添加一些常用状态设置 83 _viewer.addEventHandler(new osgViewer::StatsHandler); 84 //其实说gw就是要显示的窗口 85 osgQt::GraphicsWindowQt* gw = 86 dynamic_cast<osgQt::GraphicsWindowQt*>( 87 camera->getGraphicsContext()); 88 if (gw) 89 { 90 QVBoxLayout* layout = new QVBoxLayout; 91 layout->addWidget(gw->getGLWidget()); 92 setLayout(layout); 93 } 94 connect(&_timer, SIGNAL(timeout()), this, SLOT(update())); 95 _timer.start(40);//关联定时器计满信号和响应的槽函数 96 } 97 98 protected: 99 virtual void paintEvent(QPaintEvent* event) 100 { 101 _viewer.frame();//实时进行渲染 102 } 103 osgViewer::Viewer _viewer;//创建一个渲染器 104 QTimer _timer;//创建一个定时器 105 }; 106 int main(int argc, char **argv) 107 { 108 QApplication app(argc, argv); 109 osg::Camera* camera = createCamera(50, 50, 640, 480); 110 osg::Group * scene = new osg::Group(); 111 scene->addChild(createShape().get()); 112 113 ViewerWidget* widget = new ViewerWidget(camera, scene); 114 widget->setGeometry(100, 100, 800, 600); 115 widget->show(); 116 return app.exec(); 117 }
