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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
++
++ //! [qvector3d-class]
++ /*!
++ \class QVector3D
++ \brief The QVector3D class represents a vector or vertex in 3D space.
++ \since 4.6
++ \ingroup painting-3D
++
++ Vectors are one of the main building blocks of 3D representation and
++ drawing. They consist of three coordinates, traditionally called
++ x, y, and z.
++
++ The QVector3D class can also be used to represent vertices in 3D space.
++ We therefore do not need to provide a separate vertex class.
++
++ \note By design values in the QVector3D instance are stored as \c float.
++ This means that on platforms where the \c qreal arguments to QVector3D
++ functions are represented by \c double values, it is possible to
++ lose precision.
++
++ \sa QVector2D, QVector4D, QQuaternion
++ */
++ //! [qvector3d-class]
++
++ //! [qvector3d-function]
++ /*!
++ \fn QVector3D::QVector3D(const QPoint& point)
++
++ Constructs a vector with x and y coordinates from a 2D \a point, and a
++ z coordinate of 0.
++ */
++ //! [qvector3d-function]
++
++ //! [sample-page]
++ /*!
++ \page generic-guide.html
++ \title Generic QDoc Guide
++ \nextpage Creating QDoc Configuration Files
++ There are three essential materials for generating documentation with QDoc:
++
++ \list
++ \li \c QDoc binary (\c {qdoc})
++ \li \c qdocconf configuration files
++ \li \c Documentation in \c C++, \c QML, and \c .qdoc files
++ \endlist
++ */
++ //! [sample-page]
++
++ //! [sample-example]
++ /*!
++ \title UI Components: Tab Widget Example
++ \example declarative/ui-components/tabwidget
++
++ This example shows how to create a tab widget. It also demonstrates how
++ \l {Property aliases}{property aliases} and
++ \l {Introduction to the QML Language#Default Properties}{default properties} can be used to collect and
++ assemble the child items declared within an \l Item.
++
++ \image qml-tabwidget-example.png
++ */
++ //! [sample-example]
++
++ //! [sample-overview]
++ /*!
++ \page overview-qt-technology.html
++ \title Overview of a Qt Technology
++
++ \brief provides a technology never seen before.
++
++ */
++ //! [sample-overview]
++