内容

• 特性
• 公共函数
• 公共槽
• 信号
• 详细描述

QGeometry Class

class Qt3DRender ::QGeometry

Encapsulates geometry. 更多...

头：	#include <QGeometry>
qmake:	QT += 3drender
Since:	Qt 5.7
实例化：	几何体
继承：	Qt3DCore::QNode
继承者：	Qt3DExtras::QConeGeometry , Qt3DExtras::QCuboidGeometry , Qt3DExtras::QCylinderGeometry , Qt3DExtras::QExtrudedTextGeometry , Qt3DExtras::QPlaneGeometry , Qt3DExtras::QSphereGeometry ，和 Qt3DExtras::QTorusGeometry

该类在 Qt 5.7 引入。

• 所有成员列表，包括继承成员

特性

• boundingVolumePositionAttribute : Qt3DRender::QAttribute*
• maxExtent : const QVector3D
• minExtent : const QVector3D

公共函数

	QGeometry (Qt3DCore::QNode * parent = nullptr)
void	addAttribute (Qt3DRender::QAttribute * attribute )
QVector<Qt3DRender::QAttribute *>	attributes () const
Qt3DRender::QAttribute *	boundingVolumePositionAttribute () const
QVector3D	maxExtent () const
QVector3D	minExtent () const
void	removeAttribute (Qt3DRender::QAttribute * attribute )

公共槽

void	setBoundingVolumePositionAttribute (Qt3DRender::QAttribute * boundingVolumePositionAttribute )

信号

void	boundingVolumePositionAttributeChanged (Qt3DRender::QAttribute * boundingVolumePositionAttribute )
void	maxExtentChanged (const QVector3D & maxExtent )
void	minExtentChanged (const QVector3D & minExtent )

详细描述

A Qt3DRender::QGeometry class is used to group a list of Qt3DRender::QAttribute objects together to form a geometric shape Qt3D is able to render using Qt3DRender::QGeometryRenderer . Special attribute can be set in order to calculate bounding volume of the shape.

特性文档编制

boundingVolumePositionAttribute : Qt3DRender::QAttribute *

Holds the attribute used to compute the bounding volume. The bounding volume is used internally for picking and view frustum culling.

If unspecified, the system will look for the attribute using the name returned by QAttribute::defaultPositionAttributeName .

访问函数：

Qt3DRender::QAttribute *	boundingVolumePositionAttribute () const
void	setBoundingVolumePositionAttribute (Qt3DRender::QAttribute * boundingVolumePositionAttribute )

通知程序信号：

void	boundingVolumePositionAttributeChanged (Qt3DRender::QAttribute * boundingVolumePositionAttribute )

另请参阅 Qt3DRender::QAttribute .

maxExtent : const QVector3D

Holds the vertex with the highest x, y, z position values.

访问函数：

QVector3D

maxExtent () const

通知程序信号：

void	maxExtentChanged (const QVector3D & maxExtent )

minExtent : const QVector3D

Holds the vertex with the lowest x, y, z position values.

访问函数：

QVector3D

minExtent () const

通知程序信号：

void	minExtentChanged (const QVector3D & minExtent )

成员函数文档编制

QGeometry:: QGeometry ( Qt3DCore::QNode * parent = nullptr)

Constructs a new QGeometry with parent .

void QGeometry:: addAttribute ( Qt3DRender::QAttribute * attribute )

添加 attribute to this geometry.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

QVector < Qt3DRender::QAttribute *> QGeometry:: attributes () const

Returns the list of attributes in this geometry.

void QGeometry:: removeAttribute ( Qt3DRender::QAttribute * attribute )

移除给定 attribute from this geometry.

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .