osgEarth学习笔记4-第一个OsgEarth QT程序

原文链接

使用QT Creator新建一个窗口项目。

编辑pro文件

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
DEFINES += QT_DEPRECATED_WARNINGS
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \main.cpp \mainwindow.cppHEADERS += \mainwindow.hFORMS += \mainwindow.ui
#osg osgQt
INCLUDEPATH += "D:\coding\osgearth\osgearth-vcpkg-installed\installed\x86-windows\include"
INCLUDEPATH += "D:\coding\osgearth\osgQt-master\include"
INCLUDEPATH += "D:\coding\osgearth\osgQt-master\build-win32\src"
INCLUDEPATH += "D:\coding\osgearth\osgQt-master\build-win32\include"
INCLUDEPATH += "D:\coding\osgearth\osgQt-master\build-win32\include"
LIBS += -L"D:\coding\osgearth\osgearth-vcpkg-installed\installed\x86-windows\lib" -losg -losgUtil -losgViewer  -losgGA  -losgDB  -lOpenThreads -lopengl32
LIBS += -L"D:\coding\osgearth\osgQt-master\build-win32\lib" -losgQOpenGL
#osgEarth
INCLUDEPATH += "D:\coding\osgearth\osgearth-vcpkg-installed\installed\x86-windows\include"
LIBS += -L"D:\coding\osgearth\osgearth-vcpkg-installed\installed\x86-windows\lib" -losgEarth
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

编辑main.cpp

#include "mainwindow.h"
#include <QApplication>
#include <osgQOpenGL/osgQOpenGLWidget>
#include <osgDB/ReadFile>
#include <osgUtil/Optimizer>
#include <osg/CoordinateSystemNode>
#include <osg/Switch>
#include <osg/Types>
#include <osgText/Text>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
#include <osgGA/SphericalManipulator>
#include <osgGA/Device>
#include <QSurfaceFormat>
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;//osgEarth
#include <osgViewer/Viewer>
#include <osgEarth/Notify>
#include <osgEarth/EarthManipulator>
#include <osgEarth/ExampleResources>
#include <osgEarth/MapNode>
#include <osgEarth/Threading>
#include <osgEarth/GDAL>
#include <osgEarth/ImageLayer>
using namespace osgEarth;
using namespace osgEarth::Util;#include <osgEarth/Metrics>int main(int argc, char *argv[])
{QApplication a(argc, argv);osgEarth::initialize();osg::ArgumentParser arguments(&argc, argv);osgQOpenGLWidget widget(&arguments);QObject::connect(&widget, &osgQOpenGLWidget::initialized,[&arguments,&widget]{widget.getOsgViewer()->setCameraManipulator( new EarthManipulator(arguments) );widget.getOsgViewer()->getCamera()->setSmallFeatureCullingPixelSize(-1.0f);string tifFile = "D:/coding/osgearth/world.tif";osgEarth::Map* map = new osgEarth::Map() ;osgEarth::GDALImageLayer::Options gdalOpt ;gdalOpt.url() = tifFile ;osgEarth::GDALImageLayer* imgLayer = new osgEarth::GDALImageLayer(gdalOpt);if( imgLayer==0 ){return 20 ;}else{cout<<"good gdal layer."<<endl;}map->addLayer(imgLayer ) ;MapNode* mapNode = new MapNode(map);if(!mapNode){std::cout << "bad map node." << std::endl;return 1;}widget.getOsgViewer()->setSceneData(mapNode);return 0;});MainWindow w;w.setCentralWidget(&widget);w.show();return a.exec();
}

以Release模式编译执行，然后参考前一篇笔记，拷贝相关依赖项进入exe目录。再次运行。

此时运行会提示错误

FTH: (7640): *** Fault tolerant heap shim applied to current process. This is usually due to previous crashes. ***

Error reading file .osgearth_engine_rex: file not handled

[osgEarth]* WARNING: Failed to load terrain engine driver for "rex"

[osgEarth]* FAILED to create a terrain engine for this map

原因是没有加载到osgEarth的plugins动态库，之前我们是osg的plugins都考过来了，现在到下面目录