QT 中Widgets-Scene3d例子学习

最新推荐文章于 2024-12-29 11:25:26 发布

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原文链接：http://www.cnblogs.com/MakeView660/p/10551637.html

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#c/c++

博客介绍了在QT中利用自带例子widgets - scene3d实现在基于Widget的应用程序中使用qml 3d场景功能，还嵌入basicshapes - cpp例子。进一步将QT场景视图嵌入多文档界面，并尝试嵌入boxes例子，最后给出在Ubuntu中的测试截图效果。

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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：