OSGQt编译安装

OSGQt编译安装

---

效果演示

1、准备工作

• 最新版的osg中不附带osgQt源码，所以需要单独下载编译

• 在编译osgQt前需要先编译osg源码，osg编译安装看这里

• 编译osgQt的环境与之前编译osg源码一样

2、osgQt下载

• github

• 可使用git下载：

  git clone git@github.com:openscenegraph/osgQt.git
  

  　　

3、配置环境变量

• osg：编译好后按OSG编译安装-MSVC中方式配置环境变量

• msvc2017_64：由于这里使用msvc64编译，所以需要添加相应的环境变量

  • 打开环境变量窗口

  • 加入如下路径（需要修改为自己的Qt安装路径）

    D:\Qt\5.14.2\msvc2017_64\bin
    D:\Qt\5.14.2\msvc2017_64\lib

    

• 环境变量配置后重启电脑使环境变量生效

4、CMake编译

• 具体步骤和编译osg差不多

• 将CMakelists.txt拖入CMake中，设置好编译后的路径build

• 点击Configure，这里的选择必须与osg编译一样（如果没配置环境变量，则这一步会报错，显示找不到Qt5Config.cmake等文件）

• 修改CMAKE_INSTALL_PREFIX

• 点击Configure -> Generate -> Open Project

5、Visual Studio编译

• 后续步骤就和编译osg一样，编译好osgQt后，有如下4个文件夹，将文件夹中内容复制到osg安装路径下对应文件夹下即可（编译后会有两个lib）

6、Qt Demo

• pro文件添加

INCLUDEPATH += D:/OSG/install/include
DEPENDPATH += D:/OSG/install/include
​
win32:CONFIG(release, debug|release): LIBS += -LD:/OSG/install/lib/ -losgQOpenGL
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OSG/install/lib/ -losgQOpenGLd
​
win32:CONFIG(release, debug|release): LIBS += -LD:/OSG/install/lib/ -losgViewer
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OSG/install/lib/ -losgViewerd
​
win32:CONFIG(release, debug|release): LIBS += -LD:/OSG/install/lib/ -losgGA
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OSG/install/lib/ -losgGAd
​
​
win32:CONFIG(release, debug|release): LIBS += -LD:/OSG/install/lib/ -losgDB
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OSG/install/lib/ -losgDBd
​
win32:CONFIG(release, debug|release): LIBS += -LD:/OSG/install/lib/ -losg
else:win32:CONFIG(debug, debug|release): LIBS += -LD:/OSG/install/lib/ -losgd

• ui文件添加一个button，一个widget

• widget.h

#ifndef WIDGET_H
#define WIDGET_H
​
#include <QWidget>
#include <osgQOpenGL/osgQOpenGLWidget>
​
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
​
class Widget : public QWidget
{
    Q_OBJECT
​
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
​
protected slots:
    void initOSG();
​
private slots:
    void on_pushButton_clicked();
​
private:
    Ui::Widget *ui;
​
    osgQOpenGLWidget* osgWidget;
    QString m_fileName;
};
#endif // WIDGET_H

• widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include <osgViewer/Viewer>
#include <osg/Node>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
​
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
​
    osgWidget = new osgQOpenGLWidget(ui->widget);          // 指定osg窗口显示位置
    osgWidget->setGeometry(ui->widget->geometry());        // 指定osg窗口显示大小
    m_fileName = "D:/OSG/OpenSceneGraph-Data/avatar.osg";  // 显示模型路径
​
    connect(osgWidget, SIGNAL(initialized()), this, SLOT(initOSG()));
}
​
Widget::~Widget()
{
    delete ui;
    if(osgWidget != NULL)
    {
        delete osgWidget;
    }
}
​
void Widget::initOSG()
{
    osgViewer::Viewer* pViewer = osgWidget->getOsgViewer();
    pViewer->setCameraManipulator(new osgGA::TrackballManipulator);
    osg::Node* node = osgDB::readNodeFile(m_fileName.toStdString());
    pViewer->setSceneData(node);
}
​
void Widget::on_pushButton_clicked()
{
    m_fileName = "D:/OSG/OpenSceneGraph-Data/bignathan.osg";
    initOSG();
}

7、编译好的库

链接：https://pan.baidu.com/s/1UfNbJ0fUAzKfe3XrWNVTDA
提取码：66tf