QT(5.9.6)+OpenGL加载显示obj模型

#include <QUrl> #include "qtguiapplicationloadobj.h" #include "ui_qtguiapplicationloadobj.h" QtGuiApplicationLoadObj::QtGuiApplicationLoadObj(QWidget *parent) : QWidget(parent), ui(new Ui::QtGuiApplicationLoadObj) { ui->setupUi(this); __initializateOn3DView(); } void QtGuiApplicationLoadObj::initializate(const QString &obj_url) { // 如果将3d放置在界面中，则需要创建一个widget来“装”它 QWidget *container = QWidget::createWindowContainer(db.m_windowOn3D); // 设置场景大小 QSize screenSize = db.m_windowOn3D->screen()->size(); // 当你缩小对话框时，你希望它最小是多少 container->setMinimumSize(QSize(200, 100)); // 当你缩小对话框时，你希望它最大是多少 container->setMaximumSize(screenSize); QHBoxLayout *hLayout = new QHBoxLayout(this); QVBoxLayout *vLayout = new QVBoxLayout(); vLayout->setAlignment(Qt::AlignTop); // 将3d场景veiw放到widget中 hLayout->addWidget(container, 1); hLayout->addLayout(vLayout); // 设置3d场景的输入 db.m_windowOn3D->registerAspect(db.m_input); // 设置相机属性 // 观测视角 db.m_windowOn3D->camera()->lens()->setPerspectiveProjection(45.0f, 16.0f / 9.0f, 0.1f, 1000.0f); // 相机放哪里 db.m_windowOn3D->camera()->setPosition(QVector3D(40.0f, 20.0f, -10.0f)); db.m_windowOn3D->camera()->setUpVector(QVector3D(0, 1, 0)); // 视角中心在哪里 db.m_windowOn3D->camera()->setViewCenter(QVector3D(0, 0, 0)); Qt3DCore::QEntity *lightEntity = new Qt3DCore::QEntity(db.m_rootEntity); Qt3DRender::QPointLight *light = new Qt3DRender::QPointLight(lightEntity); light->setColor("white"); //光的颜色 light->setIntensity(1); //光的强度 lightEntity->addComponent(light); Qt3DCore::QTransform *lightTransform = new Qt3DCore::QTransform(lightEntity); lightTransform->setTranslation(db.m_windowOn3D->camera()->position()); lightEntity->addComponent(lightTransform); db.m_trans->setScale(0.1f); // 模型的缩放，我加载的模型比较大，这里要缩小显示 db.m_trans->setTranslation(QVector3D(0.0f, 0.0f, 1.45f)); Qt3DRender::QMesh *mesh = new Qt3DRender::QMesh(); mesh->setSource(QUrl(obj_url)); Qt3DExtras::QPhongMaterial *material = new Qt3DExtras::QPhongMaterial(db.m_rootEntity); material->setDiffuse(QColor(QRgb(0xa69929))); db.m_rootEntity->addComponent(mesh); db.m_rootEntity->addComponent(material); db.m_rootEntity->addComponent(db.m_trans); Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(db.m_rootEntity); camController->setCamera(db.m_windowOn3D->camera()); db.m_windowOn3D->setRootEntity(db.m_rootEntity); } void QtGuiApplicationLoadObj::__initializateOn3DView() { db.m_windowOn3D = new Qt3DWindow(); db.m_rootEntity = new QtEntity(); db.m_material = new QtMaterial(); db.m_trans = new QtTransform(); db.m_input = new QtInputAspect(); db.m_windowOn3D->defaultFrameGraph()->setClearColor(QColor(QRgb(0x4d4d4f))); } QtGuiApplicationLoadObj::~QtGuiApplicationLoadObj() { delete ui; }