内容

• 特性
• 公共函数
• 信号
• 详细描述

QCustom3DItem 类

QCustom3DItem 类向图形添加自定义项。 更多...

头：	#include <QCustom3DItem>
Since:	QtDataVisualization 1.1
实例化：	Custom3DItem
继承：	QObject
继承者：	QCustom3DLabel and QCustom3DVolume

• 所有成员列表，包括继承成员

特性

meshFile : QString position : QVector3D positionAbsolute : bool rotation : QQuaternion scaling : QVector3D

scalingAbsolute : bool shadowCasting : bool textureFile : QString visible : bool

公共函数

	QCustom3DItem (const QString & meshFile , const QVector3D & position , const QVector3D & scaling , const QQuaternion & rotation , const QImage & texture , QObject * parent = nullptr)
	QCustom3DItem (QObject * parent = nullptr)
virtual	~QCustom3DItem ()
bool	isPositionAbsolute () const
bool	isScalingAbsolute () const
bool	isShadowCasting () const
bool	isVisible () const
QString	meshFile () const
QVector3D	position () const
QQuaternion	rotation ()
QVector3D	scaling () const
void	setMeshFile (const QString & meshFile )
void	setPosition (const QVector3D & position )
void	setPositionAbsolute (bool positionAbsolute )
void	setRotation (const QQuaternion & rotation )
void	setRotationAxisAndAngle (const QVector3D & axis , float angle )
void	setScaling (const QVector3D & scaling )
void	setScalingAbsolute (bool scalingAbsolute )
void	setShadowCasting (bool enabled )
void	setTextureFile (const QString & textureFile )
void	setTextureImage (const QImage & textureImage )
void	setVisible (bool visible )
QString	textureFile () const

信号

void	meshFileChanged (const QString & meshFile )
void	positionAbsoluteChanged (bool positionAbsolute )
void	positionChanged (const QVector3D & position )
void	rotationChanged (const QQuaternion & rotation )
void	scalingAbsoluteChanged (bool scalingAbsolute )
void	scalingChanged (const QVector3D & scaling )
void	shadowCastingChanged (bool shadowCasting )
void	textureFileChanged (const QString & textureFile )
void	visibleChanged (bool visible )

详细描述

A custom item has a custom mesh, position, scaling, rotation, and an optional texture.

另请参阅 QAbstract3DGraph::addCustomItem ().

特性文档编制

meshFile : QString

This property holds the item mesh file name.

The item in the file must be in Wavefront OBJ format and include vertices, normals, and UVs. It also needs to be in triangles.

访问函数：

QString	meshFile () const
void	setMeshFile (const QString & meshFile )

通知程序信号：

void	meshFileChanged (const QString & meshFile )

position : QVector3D

This property holds the item position as a QVector3D .

默认为 QVector3D(0.0, 0.0, 0.0) .

Item position is specified either in data coordinates or in absolute coordinates, depending on the positionAbsolute property. When using absolute coordinates, values between -1.0...1.0 are within axis ranges.

注意： Items positioned outside any axis range are not rendered if positionAbsolute is false , unless the item is a QCustom3DVolume that would be partially visible and scalingAbsolute is also false . In that case, the visible portion of the volume will be rendered.

访问函数：

QVector3D	位置 () const
void	setPosition (const QVector3D & position )

通知程序信号：

void	positionChanged (const QVector3D & position )

另请参阅 positionAbsolute .

positionAbsolute : bool

This property holds whether item position is to be handled in data coordinates or in absolute coordinates.

默认为 false . Items with absolute coordinates will always be rendered, whereas items with data coordinates are only rendered if they are within axis ranges.

访问函数：

bool	isPositionAbsolute () const
void	setPositionAbsolute (bool positionAbsolute )

通知程序信号：

void	positionAbsoluteChanged (bool positionAbsolute )

另请参阅 position .

rotation : QQuaternion

This property holds the item rotation as a QQuaternion .

默认为 QQuaternion(0.0, 0.0, 0.0, 0.0) .

访问函数：

QQuaternion	rotation ()
void	setRotation (const QQuaternion & rotation )

通知程序信号：

void	rotationChanged (const QQuaternion & rotation )

scaling : QVector3D

This property holds the item scaling as a QVector3D .

默认为 QVector3D(0.1, 0.1, 0.1) .

Item scaling is either in data values or in absolute values, depending on the scalingAbsolute property. The default vector interpreted as absolute values sets the item to 10% of the height of the graph, provided the item mesh is normalized and the graph aspect ratios have not been changed from the defaults.

访问函数：

QVector3D	scaling () const
void	setScaling (const QVector3D & scaling )

通知程序信号：

void	scalingChanged (const QVector3D & scaling )

另请参阅 scalingAbsolute .

[since QtDataVisualization 1.2] scalingAbsolute : bool

This property holds whether item scaling is to be handled in data values or in absolute values.

默认为 true .

Items with absolute scaling will be rendered at the same size, regardless of axis ranges. Items with data scaling will change their apparent size according to the axis ranges. If positionAbsolute is true , this property is ignored and scaling is interpreted as an absolute value. If the item has rotation, the data scaling is calculated on the unrotated item. Similarly, for QCustom3DVolume items, the range clipping is calculated on the unrotated item.

注意： Only absolute scaling is supported for QCustom3DLabel items or for custom items used in polar 图形。

注意： The custom item's mesh must be normalized to the range [-1 ,1] , or the data scaling will not be accurate.

该特性在 QtDataVisualization 1.2 引入。

访问函数：

bool	isScalingAbsolute () const
void	setScalingAbsolute (bool scalingAbsolute )

通知程序信号：

void	scalingAbsoluteChanged (bool scalingAbsolute )

另请参阅 scaling and positionAbsolute .

shadowCasting : bool

This property holds whether shadow casting for the item is enabled.

默认为 true 。若 false , the item does not cast shadows regardless of QAbstract3DGraph::ShadowQuality .

访问函数：

bool	isShadowCasting () const
void	setShadowCasting (bool enabled )

通知程序信号：

void	shadowCastingChanged (bool shadowCasting )

textureFile : QString

This property holds the texture file name for the item.

If both this property and the texture image are unset, a solid gray texture will be used.

注意： To conserve memory, the QImage loaded from the file is cleared after a texture is created.

访问函数：

QString	textureFile () const
void	setTextureFile (const QString & textureFile )

通知程序信号：

void	textureFileChanged (const QString & textureFile )

visible : bool

This property holds the visibility of the item.

默认为 true .

访问函数：

bool	isVisible () const
void	setVisible (bool visible )

通知程序信号：

void	visibleChanged (bool visible )

成员函数文档编制

QCustom3DItem:: QCustom3DItem (const QString & meshFile , const QVector3D & position , const QVector3D & scaling , const QQuaternion & rotation , const QImage & texture , QObject * parent = nullptr)

Constructs a custom 3D item with the specified meshFile , position , scaling , rotation , texture image, and optional parent .

QCustom3DItem:: QCustom3DItem ( QObject * parent = nullptr)

Constructs a custom 3D item with the specified parent .

[虚拟] QCustom3DItem:: ~QCustom3DItem ()

删除自定义 3D 项。

[invokable] void QCustom3DItem:: setRotationAxisAndAngle (const QVector3D & axis , float angle )

A convenience function to construct the rotation quaternion from axis and angle .

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

另请参阅 rotation .

void QCustom3DItem:: setTextureImage (const QImage & textureImage )

设置值为 textureImage 作为 QImage for the item. The texture defaults to solid gray.

注意： To conserve memory, the given QImage is cleared after a texture is created.