內容

• 特性
• 公共函數
• 公共槽
• 信號
• 靜態公共成員
• 詳細描述

QPointLight Class

( Qt3DRender::QPointLight )

Encapsulate a Point Light object in a Qt 3D scene. 更多...

頭：	#include <QPointLight>
qmake:	QT += 3drender
Since:	Qt 5.5
實例化：	PointLight
繼承：	Qt3DRender::QAbstractLight

• 所有成員列錶，包括繼承成員
• 過時成員

特性

• constantAttenuation : float
• linearAttenuation : float
• quadraticAttenuation : float

• 3 特性繼承自 Qt3DRender::QAbstractLight
• 1 特性繼承自 Qt3DCore::QComponent
• 3 特性繼承自 Qt3DCore::QNode
• 1 特性繼承自 QObject

公共函數

	QPointLight (Qt3DCore::QNode * parent = nullptr)
float	constantAttenuation () const
float	linearAttenuation () const
float	quadraticAttenuation () const

• 3 公共函數繼承自 Qt3DRender::QAbstractLight
• 2 公共函數繼承自 Qt3DCore::QComponent
• 13 公共函數繼承自 Qt3DCore::QNode
• 31 公共函數繼承自 QObject

公共槽

void	setConstantAttenuation (float value )
void	setLinearAttenuation (float value )
void	setQuadraticAttenuation (float value )

• 2 公共槽繼承自 Qt3DRender::QAbstractLight
• 1 公共槽繼承自 Qt3DCore::QComponent
• 3 公共槽繼承自 Qt3DCore::QNode
• 1 公共槽繼承自 QObject

信號

void	constantAttenuationChanged (float constantAttenuation )
void	linearAttenuationChanged (float linearAttenuation )
void	quadraticAttenuationChanged (float quadraticAttenuation )

• 2 信號繼承自 Qt3DRender::QAbstractLight
• 3 信號繼承自 Qt3DCore::QComponent
• 4 信號繼承自 Qt3DCore::QNode
• 2 信號繼承自 QObject

靜態公共成員

const QMetaObject

staticMetaObject

• 9 靜態公共成員繼承自 QObject

額外繼承成員

• 2 保護函數繼承自 Qt3DCore::QNode
• 9 保護函數繼承自 QObject

詳細描述

Encapsulate a Point Light object in a Qt 3D scene.

A point light is a light source that emits light in all directions, from a single point. Conceptually, this is similar to light given off by a standard light bulb.

A point light uses three attenuation factors to describe how the intensity of the light decreases over distance. These factors are designed to be used together in calcuating total attenuation. For the materials in Qt3D Extras the following formula is used, where distance is the distance from the light to the surface being rendered:

totalAttenuation = 1.0 / (constantAttenuation + (linearAttenuation * distance) + (quadraticAttenuation * distance * distance));
					

Custom materials may choose to interpret these factors differently.

特性文檔編製

constantAttenuation : float

Specifies the constant attenuation of the point light

訪問函數：

float	constantAttenuation () const
void	setConstantAttenuation (float value )

通知程序信號：

void	constantAttenuationChanged (float constantAttenuation )

linearAttenuation : float

Specifies the linear attenuation of the point light

訪問函數：

float	linearAttenuation () const
void	setLinearAttenuation (float value )

通知程序信號：

void	linearAttenuationChanged (float linearAttenuation )

quadraticAttenuation : float

Specifies the quadratic attenuation of the point light

訪問函數：

float	quadraticAttenuation () const
void	setQuadraticAttenuation (float value )

通知程序信號：

void	quadraticAttenuationChanged (float quadraticAttenuation )

成員函數文檔編製

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

構造新的 QPointLight 采用指定 parent .