QT 中Widgets-Scene3d例子学习

QT中自带的例子widgets-scene3d实现在基于Widget的应用程序中使用qml 3d场景的功能，我在此基础上，将basicshapes-cpp的例子加以嵌入：

相关代码如下：

 C++ Code 

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#include <QApplication> #include <QMainWindow> #include <QQuickWidget> #include <QMdiArea> #include <QLCDNumber> #include <QMenuBar> #include "scenemodifier.h" #include <Qt3DRender/qcamera.h> #include <Qt3DCore/qentity.h> #include <Qt3DRender/qcameralens.h> #include <Qt3DInput/QInputAspect> #include <Qt3DExtras/qtorusmesh.h> #include <Qt3DRender/qmesh.h> #include <Qt3DRender/qtechnique.h> #include <Qt3DRender/qmaterial.h> #include <Qt3DRender/qeffect.h> #include <Qt3DRender/qtexture.h> #include <Qt3DRender/qrenderpass.h> #include <Qt3DRender/qsceneloader.h> #include <Qt3DRender/qpointlight.h> #include <Qt3DCore/qtransform.h> #include <Qt3DCore/qaspectengine.h> #include <Qt3DRender/qrenderaspect.h> #include <Qt3DExtras/qforwardrenderer.h> #include <Qt3DExtras/qt3dwindow.h> #include <Qt3DExtras/qfirstpersoncameracontroller.h> int main(int argc, char **argv) {     QApplication app(argc, argv);     QMainWindow mainWindow;     QMdiArea *centralWidget = new QMdiArea;     // 子窗口1     QLCDNumber *lcd = new QLCDNumber;     lcd->display(1337);     lcd->setMinimumSize(250, 100);     centralWidget->addSubWindow(lcd);     // 子窗口2     QQuickWidget *quickWidget = new QQuickWidget;     quickWidget->setMinimumSize(300, 300);     quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);     quickWidget->setSource(QUrl("qrc:/main.qml"));     centralWidget->addSubWindow(quickWidget);     // 子窗口3     Qt3DExtras::Qt3DWindow *view = new Qt3DExtras::Qt3DWindow();     view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x4d4d4f)));     QWidget *container = QWidget::createWindowContainer(view);     container->setMinimumSize(400, 400);     centralWidget->addSubWindow(container);     Qt3DInput::QInputAspect *input = new Qt3DInput::QInputAspect;     view->registerAspect(input);     // Root entity     Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity();     // Camera     Qt3DRender::QCamera *cameraEntity = view->camera();     cameraEntity->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);     cameraEntity->setPosition(QVector3D(0, 0, 20.0f));     cameraEntity->setUpVector(QVector3D(0, 1, 0));     cameraEntity->setViewCenter(QVector3D(0, 0, 0));     Qt3DCore::QEntity *lightEntity = new Qt3DCore::QEntity(rootEntity);     Qt3DRender::QPointLight *light = new Qt3DRender::QPointLight(lightEntity);     light->setColor("white");     light->setIntensity(1);     lightEntity->addComponent(light);     Qt3DCore::QTransform *lightTransform = new Qt3DCore::QTransform(lightEntity);     lightTransform->setTranslation(cameraEntity->position());     lightEntity->addComponent(lightTransform);     // For camera controls     Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(rootEntity);     camController->setCamera(cameraEntity);     // Scenemodifier     SceneModifier *modifier = new SceneModifier(rootEntity);     // Set root object of the scene     view->setRootEntity(rootEntity);     mainWindow.setCentralWidget(centralWidget);     QMenu *fileMenu = mainWindow.menuBar()->addMenu(QObject::tr("&File"));     fileMenu->addAction(QObject::tr("E&xit"), qApp, &QCoreApplication::quit);     mainWindow.resize(1024, 768);     mainWindow.show();     return app.exec(); }

 再进一步，我将QT场景视图（Graphics-View）嵌入多文档界面，下面尝试将QT自带的boxes例子（GraphicsView With OpenGL）嵌入，相关代码如下：

 C++ Code 

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// 子窗口4-GraphicsView With OpenGL QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers)); widget->makeCurrent(); Scene scene(1024, 768, maxTextureSize);; GraphicsView view; view.setViewport(widget); view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate); view.setScene(&scene); //gview.show(); centralWidget->addSubWindow(&gview);

我在Ubuntu中测试的一个截图效果如下：