QScreenRayCaster Class

class Qt3DRender ::QScreenRayCaster

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

頭：	#include <QScreenRayCaster>
qmake:	QT += 3drender
Since:	Qt 5.11
實例化：	ScreenRayCaster
繼承：	Qt3DRender::QAbstractRayCaster

該類在 Qt 5.11 引入。

所有成員列錶，包括繼承成員

特性

position : QPoint

公共函數

QPoint

position () const

公共槽

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

信號

void	positionChanged (const QPoint & position )

詳細描述

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.

另請參閱 QRayCaster and QNoPicking .

特性文檔編製

position : 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.

訪問函數：

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

通知程序信號：

void	positionChanged (const QPoint & position )

成員函數文檔編製

`[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.