# QVector4D Class Reference
## [[QtGui](index.htm) module]
该QVector4D类表示四维空间中的向量或顶点。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, float xpos, float ypos, float zpos, float wpos)`
* `__init__ (self, QPoint point)`
* `__init__ (self, QPointF point)`
* `__init__ (self, QVector2D vector)`
* `__init__ (self, QVector2D vector, float zpos, float wpos)`
* `__init__ (self, QVector3D vector)`
* `__init__ (self, QVector3D vector, float wpos)`
* `__init__ (self, QVector4D)`
* `bool isNull (self)`
* `float length (self)`
* `float lengthSquared (self)`
* `normalize (self)`
* `QVector4D normalized (self)`
* `setW (self, float aW)`
* `setX (self, float aX)`
* `setY (self, float aY)`
* `setZ (self, float aZ)`
* `QPoint toPoint (self)`
* `QPointF toPointF (self)`
* `QVector2D toVector2D (self)`
* `QVector2D toVector2DAffine (self)`
* `QVector3D toVector3D (self)`
* `QVector3D toVector3DAffine (self)`
* `float w (self)`
* `float x (self)`
* `float y (self)`
* `float z (self)`
### Static Methods
* `float dotProduct (QVector4D v1, QVector4D v2)`
### Special Methods
* `QVector4D __add__ (self, QVector4D v2)`
* `QVector4D __div__ (self, float divisor)`
* `bool __eq__ (self, QVector4D v2)`
* `QVector4D __iadd__ (self, QVector4D vector)`
* `QVector4D __idiv__ (self, float divisor)`
* `QVector4D __imul__ (self, float factor)`
* `QVector4D __imul__ (self, QVector4D vector)`
* `QVector4D __isub__ (self, QVector4D vector)`
* `QVector4D __mul__ (self, QMatrix4x4 matrix)`
* `QVector4D __mul__ (self, QVector4D vector)`
* `QVector4D __mul__ (self, float factor)`
* `QVector4D __mul__ (self, QVector4D v2)`
* `bool __ne__ (self, QVector4D v2)`
* `QVector4D __neg__ (self)`
* `str __repr__ (self)`
* `QVector4D __sub__ (self, QVector4D v2)`
* * *
## Detailed Description
这个类可以醃制。
该QVector4D类表示四维空间中的向量或顶点。
该QVector4D类也可以用来表示在四维空间的顶点。因此,我们并不需要提供一个独立的顶点类。
**Note:**通过在QVector4D实例设计值存储`float`。这意味着,在平台上,其中`qreal`参数QVector4D函数表示为`double`值,有可能丢失精度。
* * *
## Method Documentation
```
QVector4D.__init__ (self)
```
构造一个空向量,即坐标为( 0 , 0 , 0 , 0 ) 。
```
QVector4D.__init__ (self, float xpos, float ypos, float zpos, float wpos)
```
构造一个具有坐标向量(_xpos_,_ypos_,_zpos_,_wpos_) 。
```
QVector4D.__init__ (self, QPoint point)
```
构造一个向量x和y坐标从2D_point_和z为0瓦特坐标。
```
QVector4D.__init__ (self, QPointF point)
```
构造一个向量x和y坐标从2D_point_和z为0瓦特坐标。
```
QVector4D.__init__ (self, QVector2D vector)
```
构造一个4D向量从指定的2D_vector_。在z和w坐标被设置为零。
**See also** [toVector2D](qvector4d.html#toVector2D)( ) 。
```
QVector4D.__init__ (self, QVector2D vector, float zpos, float wpos)
```
构造一个4D向量从指定的2D_vector_。在z和w的坐标被设置为_zpos_和_wpos_分别。
**See also** [toVector2D](qvector4d.html#toVector2D)( ) 。
```
QVector4D.__init__ (self, QVector3D vector)
```
构造一个4D向量从指定的3D_vector_。的瓦特坐标被设置为零。
**See also** [toVector3D](qvector4d.html#toVector3D)( ) 。
```
QVector4D.__init__ (self, QVector3D vector, float wpos)
```
构造一个4D向量从指定的3D_vector_。在W的坐标设置为_wpos_。
**See also** [toVector3D](qvector4d.html#toVector3D)( ) 。
```
QVector4D.__init__ (self, QVector4D)
```
```
float QVector4D.dotProduct (QVector4D v1, QVector4D v2)
```
返回的点积_v1_和_v2_。
```
bool QVector4D.isNull (self)
```
返回True如果在x,y , z和w坐标都设置为0.0 ,否则返回False 。
```
float QVector4D.length (self)
```
返回向量的距离原点的长度。
**See also** [lengthSquared](qvector4d.html#lengthSquared)()和[normalized](qvector4d.html#normalized)( ) 。
```
float QVector4D.lengthSquared (self)
```
返回向量的距离原点的平方长度。这等同于用本身的矢量的点积。
**See also** [length](qvector4d.html#length)()和[dotProduct](qvector4d.html#dotProduct)( ) 。
```
QVector4D.normalize (self)
```
标准化到位确认当期的载体。如果该矢量是零矢量或矢量的长度非常接近1没有反应。
**See also** [length](qvector4d.html#length)()和[normalized](qvector4d.html#normalized)( ) 。
```
QVector4D QVector4D.normalized (self)
```
[
返回此向量的归一化的单位向量形式。
如果这个向量为null,则一个空向量被返回。如果该矢量的长度非常接近1,则向量将被返回原样。否则,长度为1的向量的归一化形式将被退回。
](qvector4d.html)
[**See also**](qvector4d.html) [length](qvector4d.html#length)()和[normalize](qvector4d.html#normalize)( ) 。
```
QVector4D.setW (self, float aW)
```
设置该点的坐标瓦特为给定的_w_协调。
**See also** [w](qvector4d.html#w)( )[setX](qvector4d.html#setX)( )[setY](qvector4d.html#setY)()和[setZ](qvector4d.html#setZ)( ) 。
```
QVector4D.setX (self, float aX)
```
设置该点的x坐标,以给定的_x_协调。
**See also** [x](qvector4d.html#x)( )[setY](qvector4d.html#setY)( )[setZ](qvector4d.html#setZ)()和[setW](qvector4d.html#setW)( ) 。
```
QVector4D.setY (self, float aY)
```
设置该点的y坐标为给定的_y_协调。
**See also** [y](qvector4d.html#y)( )[setX](qvector4d.html#setX)( )[setZ](qvector4d.html#setZ)()和[setW](qvector4d.html#setW)( ) 。
```
QVector4D.setZ (self, float aZ)
```
设置该点的z坐标,以给定的_z_协调。
**See also** [z](qvector4d.html#z)( )[setX](qvector4d.html#setX)( )[setY](qvector4d.html#setY)()和[setW](qvector4d.html#setW)( ) 。
```
QPoint QVector4D.toPoint (self)
```
[](qpoint.html)
[返回](qpoint.html)[QPoint](qpoint.html)构成本4D向量。在Z和W坐标将被丢弃。
**See also** [toPointF](qvector4d.html#toPointF)()和[toVector2D](qvector4d.html#toVector2D)( ) 。
```
QPointF QVector4D.toPointF (self)
```
[](qpointf.html)
[返回](qpointf.html)[QPointF](qpointf.html)构成本4D向量。在Z和W坐标将被丢弃。
**See also** [toPoint](qvector4d.html#toPoint)()和[toVector2D](qvector4d.html#toVector2D)( ) 。
```
QVector2D QVector4D.toVector2D (self)
```
[
返回此4D向量的二维矢量形式,滴在z和w的坐标。
](qvector2d.html)
[**See also**](qvector2d.html) [toVector2DAffine](qvector4d.html#toVector2DAffine)( )[toVector3D](qvector4d.html#toVector3D)()和[toPoint](qvector4d.html#toPoint)( ) 。
```
QVector2D QVector4D.toVector2DAffine (self)
```
[
返回此4D向量的二维矢量的形式,将所述x和y坐标由瓦特坐标和滴的z坐标。返回一个空向量,如果w是零。
](qvector2d.html)
[**See also**](qvector2d.html) [toVector2D](qvector4d.html#toVector2D)( )[toVector3DAffine](qvector4d.html#toVector3DAffine)()和[toPoint](qvector4d.html#toPoint)( ) 。
```
QVector3D QVector4D.toVector3D (self)
```
[
返回此4D向量的三维矢量形式,下降的W坐标。
](qvector3d.html)
[**See also**](qvector3d.html) [toVector3DAffine](qvector4d.html#toVector3DAffine)( )[toVector2D](qvector4d.html#toVector2D)()和[toPoint](qvector4d.html#toPoint)( ) 。
```
QVector3D QVector4D.toVector3DAffine (self)
```
[
返回此4D向量的三维矢量的形式,将所述的x, y和z的瓦特坐标的坐标。返回一个空向量,如果w是零。
](qvector3d.html)
[**See also**](qvector3d.html) [toVector3D](qvector4d.html#toVector3D)( )[toVector2DAffine](qvector4d.html#toVector2DAffine)()和[toPoint](qvector4d.html#toPoint)( ) 。
```
float QVector4D.w (self)
```
返回此点的W坐标。
**See also** [setW](qvector4d.html#setW)( )[x](qvector4d.html#x)( )[y](qvector4d.html#y)()和[z](qvector4d.html#z)( ) 。
```
float QVector4D.x (self)
```
返回该点的x坐标。
**See also** [setX](qvector4d.html#setX)( )[y](qvector4d.html#y)( )[z](qvector4d.html#z)()和[w](qvector4d.html#w)( ) 。
```
float QVector4D.y (self)
```
返回此点的y坐标。
**See also** [setY](qvector4d.html#setY)( )[x](qvector4d.html#x)( )[z](qvector4d.html#z)()和[w](qvector4d.html#w)( ) 。
```
float QVector4D.z (self)
```
返回此点的z坐标。
**See also** [setZ](qvector4d.html#setZ)( )[x](qvector4d.html#x)( )[y](qvector4d.html#y)()和[w](qvector4d.html#w)( ) 。
```
QVector4D QVector4D.__add__ (self, QVector4D v2)
```
[](qvector4d.html)
```
QVector4D QVector4D.__div__ (self, float divisor)
```
[
```
bool QVector4D.__eq__ (self, QVector4D v2)
```
](qvector4d.html)
```
QVector4D QVector4D.__iadd__ (self, QVector4D vector)
```
[](qvector4d.html)
```
QVector4D QVector4D.__idiv__ (self, float divisor)
```
[](qvector4d.html)
```
QVector4D QVector4D.__imul__ (self, float factor)
```
[](qvector4d.html)
```
QVector4D QVector4D.__imul__ (self, QVector4D vector)
```
[](qvector4d.html)
```
QVector4D QVector4D.__isub__ (self, QVector4D vector)
```
[](qvector4d.html)
```
QVector4D QVector4D.__mul__ (self, QMatrix4x4 matrix)
```
[](qvector4d.html)
```
QVector4D QVector4D.__mul__ (self, QVector4D vector)
```
[](qvector4d.html)
```
QVector4D QVector4D.__mul__ (self, float factor)
```
[](qvector4d.html)
```
QVector4D QVector4D.__mul__ (self, QVector4D v2)
```
[
```
bool QVector4D.__ne__ (self, QVector4D v2)
```
](qvector4d.html)
```
QVector4D QVector4D.__neg__ (self)
```
[
```
str QVector4D.__repr__ (self)
```
](qvector4d.html)
```
QVector4D QVector4D.__sub__ (self, QVector4D v2)
```
[](qvector4d.html)
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- QRectF Class Reference
- QRegExp Class Reference
- QRegExpValidator Class Reference
- QRegion Class Reference
- QResizeEvent Class Reference
- QResource Class Reference
- QRubberBand Class Reference
- QRunnable Class Reference
- QScriptClass Class Reference
- QScriptClassPropertyIterator Class Reference
- QScriptContext Class Reference
- QScriptContextInfo Class Reference
- QScriptEngine Class Reference
- QScriptEngineAgent Class Reference
- QScriptEngineDebugger Class Reference
- QScriptString Class Reference
- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文档翻译:Qt样式单参考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference