QScreenRayCaster Class

class Qt3DRender ::QScreenRayCaster

Performe ray casting test based on screen coordinates. 更多...

头：	#include <QScreenRayCaster>
qmake:	QT += 3drender
Since:	Qt 5.11
实例化：	ScreenRayCaster
继承：	Qt3DRender::QAbstractRayCaster

该类在 Qt 5.11 引入。

所有成员列表，包括继承成员

特性

position : QPoint

公共函数

QPoint

position () const

公共槽

void	setPosition (const QPoint & position )
void	trigger (const QPoint & position )
void	trigger ()

信号

void	positionChanged (const QPoint & position )

详细描述

QScreenRayCaster can be used to perform ray casting tests by specifying coordinates in screen space, which will be used to construct an actual 3D ray between the near and far planes.

另请参阅 QRayCaster and QNoPicking .

特性文档编制

位置 : QPoint

Holds the screen space position used to compute the actual 3D ray for intersection tests.

Note: the coordinates will be used for every available render surface as long as they are in the valid range.

访问函数：

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

通知程序信号：

void	positionChanged (const QPoint & position )

成员函数文档编制

`[slot]` void QScreenRayCaster:: trigger (const QPoint & position )

Convenience method to set the coordinate value position and enable the component to trigger tests.

`[slot]` void QScreenRayCaster:: trigger ()

Convenience method to enable the component and trigger tests using the current coordinate value.