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一，新建一个 QOsgWidget 类，继承自osgQOpenGLWidget
#ifndef QOSGWIDGET_H
#define QOSGWIDGET_H#include <QObject>
#include <osgViewer/Viewer>
#include <osgQOpenGL/osgQOpenGLWidget>
class QOsgWidget: public osgQOpenGLWidget
{public:explicit QOsgWidget(QWidget *parent = nullptr);QSize sizeHint() const;void InitQOsgWidget();};#endif // QOSGWIDGET_H
#include "qosgwidget.h"
#include <QDebug>
QOsgWidget::QOsgWidget(QWidget *parent):osgQOpenGLWidget(parent)
{//多重采样QSurfaceFormat surfaceFormat;surfaceFormat.setSamples(6);setFormat(surfaceFormat);
}QSize QOsgWidget::sizeHint() const
{return QSize(this->width(),this->height());
}
二，UI中创建一个QWidget 并提升为QOsgWidget
三，主窗初始化这个QOsgWidget。 这里以一个 网格 节点为例。
#ifndef WIDGET_H
#define WIDGET_H#include <osg/Node>
#include <QWidget>
#include "qosgwidget.h"QT_BEGIN_NAMESPACE
namespace Ui {
class Widget;
}
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();private:Ui::Widget *ui;void InitQOsgWidget();osg::ref_ptr<osg::Group> _Root = nullptr;osg::ref_ptr<osgViewer::Viewer> _Viewer = nullptr;
};
#endif // WIDGET_H
#include "widget.h"
#include "ui_widget.h"#include <osgGA/TrackballManipulator>
#include <osgUtil/Optimizer>
#include <osgGA/GUIEventHandler>
#include <osgViewer/ViewerEventHandlers>Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);connect(ui->widget, &osgQOpenGLWidget::initialized, this, &Widget::InitQOsgWidget);
}Widget::~Widget()
{delete ui;
}void Widget::InitQOsgWidget()
{_Root = new osg::Group();QSize size = ui->widget->size();osg::ref_ptr<osgGA::TrackballManipulator> trackball = new osgGA::TrackballManipulator;trackball->setAllowThrow(false);trackball->setAutoComputeHomePosition(true);trackball->setThreadSafeRefUnref(true);osgUtil::Optimizer optimizer;optimizer.optimize(_Root.get());_Viewer = ui->widget->getOsgViewer();_Viewer->addEventHandler(new osgViewer::StatsHandler);_Viewer->getCamera()->setClearColor(osg::Vec4(0.2, 0.2, 0.2, 1));_Viewer->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(size.width())/static_cast<double>(size.height()), 1.0f, 10000.0f );_Viewer->setCameraManipulator(trackball);_Viewer->setRunMaxFrameRate(60);osg::ref_ptr<osg::Geode> grid = new osg::Geode;osg::Geometry* geom = new osg::Geometry;grid->addChild(geom);osg::Vec3Array* vertex = new osg::Vec3Array;geom->setVertexArray(vertex);//沿xy平面画线，间隔500米，从-10000，画到100000for (int i = -10; i <= 10; i += 1){vertex->push_back(osg::Vec3(i, -10, 0));vertex->push_back(osg::Vec3(i, 10, 0));vertex->push_back(osg::Vec3(-10, i, 0));vertex->push_back(osg::Vec3(10, i, 0));}geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES, 0, vertex->size()));osg::Vec4Array* color = new osg::Vec4Array();color->push_back(osg::Vec4(0.7, 0.7, 0.7, 1.0));geom->setColorArray(color, osg::Array::BIND_OVERALL);geom->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);_Root->addChild(grid);_Viewer->setSceneData(_Root.get());
}
四，效果
集成OSG | Qt 你好
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