QLayerFilter Class

class Qt3DRender ::QLayerFilter

Controls layers drawn in a frame graph branch. 更多...

头：	#include <QLayerFilter>
qmake:	QT += 3drender
Since:	Qt 5.5
实例化：	LayerFilter
继承：	Qt3DRender::QFrameGraphNode

该类在 Qt 5.5 引入。

所有成员列表，包括继承成员

公共类型

enum	FilterMode { AcceptAnyMatchingLayers, AcceptAllMatchingLayers, DiscardAnyMatchingLayers, DiscardAllMatchingLayers }

特性

filterMode : FilterMode

公共函数

	QLayerFilter (Qt3DCore::QNode * parent = nullptr)
void	addLayer (Qt3DRender::QLayer * layer )
Qt3DRender::QLayerFilter::FilterMode	filterMode () const
QVector<Qt3DRender::QLayer *>	layers () const
void	removeLayer (Qt3DRender::QLayer * layer )
void	setFilterMode (Qt3DRender::QLayerFilter::FilterMode filterMode )

信号

void	filterModeChanged (Qt3DRender::QLayerFilter::FilterMode filterMode )

详细描述

A Qt3DRender::QLayerFilter can be used to instruct the renderer as to which layer(s) to draw in that branch of the frame graph. QLayerFilter selects which entities to draw based on the QLayer instance(s) added to the QLayerFilter and as components to Qt3DCore::QEntity .

QLayerFilter can be configured to select or discard entities with a specific QLayer 从属 filterMode property. By default, entities referencing one of the QLayer objects that are also being referenced by the QLayerFilter are selected ( AcceptAnyMatchingLayers ).

Within the FrameGraph tree, multiple QLayerFilter nodes can be nested within a branch going from root to a leaf. In that case the filtering will first operate on all entities of the scene using the filtering method specified by the first declared QLayerFilter . Then the filtered subset of entities will be filtered again based on the filtering method set on the second QLayerFilter declared. This is then repeated until all QLayerFilter nodes of the branch have been consumed.

成员类型文档编制

enum QLayerFilter:: FilterMode

Specifies the rules for selecting entities to draw.

常量	值	描述
`Qt3DRender::QLayerFilter::AcceptAnyMatchingLayers`	`0`	Accept entities that reference one or more QLayer objects added to this QLayerFilter . This is the default
`Qt3DRender::QLayerFilter::AcceptAllMatchingLayers`	`1`	Accept entities that reference all the QLayer objects added to this QLayerFilter
`Qt3DRender::QLayerFilter::DiscardAnyMatchingLayers`	`2`	Discard entities that reference one or more QLayer objects added to this QLayerFilter
`Qt3DRender::QLayerFilter::DiscardAllMatchingLayers`	`3`	Discard entities that reference all QLayer objects added to this QLayerFilter

特性文档编制

filterMode : FilterMode

Holds the filter mode specifying the entities to select for drawing.

The default value is AcceptMatchingLayers.

访问函数：

Qt3DRender::QLayerFilter::FilterMode	filterMode () const
void	setFilterMode (Qt3DRender::QLayerFilter::FilterMode filterMode )

通知程序信号：

void	filterModeChanged (Qt3DRender::QLayerFilter::FilterMode filterMode )

成员函数文档编制

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

The constructor creates an instance with the specified parent .

void QLayerFilter:: addLayer ( Qt3DRender::QLayer * layer )

Add layer to the current list of layers

QVector < Qt3DRender::QLayer *> QLayerFilter:: layers () const

Returns the current list of layers

void QLayerFilter:: removeLayer ( Qt3DRender::QLayer * layer )

移除 layer from the current list of layers