QForwardRenderer Class

class Qt3DExtras ::QForwardRenderer

The QForwardRenderer provides a default FrameGraph implementation of a forward renderer. 更多...

头：	#include <QForwardRenderer>
qmake:	QT += 3dextras
Since:	Qt 5.7
实例化：	ForwardRenderer
继承：	Qt3DRender::QTechniqueFilter

该类在 Qt 5.7 引入。

特性

buffersToClear : Qt3DRender::QClearBuffers::BufferType
camera : Qt3DCore::QEntity*
clearColor : QColor
externalRenderTargetSize : QSize
frustumCulling : bool

gamma : float
showDebugOverlay : bool
surface : QObject*
viewportRect : QRectF

公共函数

Qt3DRender::QClearBuffers::BufferType	buffersToClear () const
Qt3DCore::QEntity *	camera () const
QColor	clearColor () const
QSize	externalRenderTargetSize () const
float	gamma () const
bool	isFrustumCullingEnabled () const
bool	showDebugOverlay () const
QObject *	surface () const
QRectF	viewportRect () const

公共槽

void	setBuffersToClear ( Qt3DRender::QClearBuffers::BufferType )
void	setCamera (Qt3DCore::QEntity * camera )
void	setClearColor (const QColor & clearColor )
void	setExternalRenderTargetSize (const QSize & size )
void	setFrustumCullingEnabled (bool enabled )
void	setGamma (float gamma )
void	setShowDebugOverlay (bool showDebugOverlay )
void	setSurface (QObject * surface )
void	setViewportRect (const QRectF & viewportRect )

信号

void	buffersToClearChanged ( Qt3DRender::QClearBuffers::BufferType )
void	cameraChanged (Qt3DCore::QEntity * camera )
void	clearColorChanged (const QColor & clearColor )
void	externalRenderTargetSizeChanged (const QSize & size )
void	frustumCullingEnabledChanged (bool enabled )
void	gammaChanged (float gamma )
void	showDebugOverlayChanged (bool showDebugOverlay )
void	surfaceChanged (QObject * surface )
void	viewportRectChanged (const QRectF & viewportRect )

详细描述

Forward rendering is what OpenGL traditionally uses. It renders directly to the backbuffer one object at a time shading each one as it goes.

QForwardRenderer is a single leaf FrameGraph tree which contains a Qt3DRender::QViewport ， Qt3DRender::QCameraSelector ，和 Qt3DRender::QClearBuffers . The QForwardRenderer has a default requirement filter key whose name is "renderingStyle" and value "forward". If you need to filter out your techniques, you should do so based on that filter key.

By default the viewport occupies the whole screen and the clear color is white. Frustum culling is also enabled.

特性文档编制

buffersToClear : Qt3DRender::QClearBuffers::BufferType

Holds the current buffers to be cleared. Default value is ColorDepthBuffer

该特性在 Qt 5.14 引入。

访问函数：

Qt3DRender::QClearBuffers::BufferType	buffersToClear () const
void	setBuffersToClear ( Qt3DRender::QClearBuffers::BufferType )

通知程序信号：

void	buffersToClearChanged ( Qt3DRender::QClearBuffers::BufferType )

camera : Qt3DCore::QEntity *

Holds the current camera entity used to render the scene.

注意： A camera is a QEntity that has a QCameraLens as one of its components.

访问函数：

Qt3DCore::QEntity *	camera () const
void	setCamera (Qt3DCore::QEntity * camera )

通知程序信号：

void	cameraChanged (Qt3DCore::QEntity * camera )

clearColor : QColor

Holds the current clear color of the scene. The frame buffer is initialized to the clear color before rendering.

访问函数：

QColor	clearColor () const
void	setClearColor (const QColor & clearColor )

通知程序信号：

void	clearColorChanged (const QColor & clearColor )

externalRenderTargetSize : QSize

Contains the size of the external render target. External render targets are relevant when rendering does not target a window surface (as set in surface ).

访问函数：

QSize	externalRenderTargetSize () const
void	setExternalRenderTargetSize (const QSize & size )

通知程序信号：

void	externalRenderTargetSizeChanged (const QSize & size )

frustumCulling : bool

Indicates if the renderer applies frustum culling to the scene.

访问函数：

bool	isFrustumCullingEnabled () const
void	setFrustumCullingEnabled (bool enabled )

通知程序信号：

void	frustumCullingEnabledChanged (bool enabled )

gamma : float

Holds the gamma value the renderer applies to the scene.

访问函数：

float	gamma () const
void	setGamma (float gamma )

通知程序信号：

void	gammaChanged (float gamma )

showDebugOverlay : bool

If true, a debug overlay will be rendered over the scene. It will show detailed information about the runtime rendering state, let the user turn logging on and off, etc.

该特性在 Qt 5.15 引入。

访问函数：

bool	showDebugOverlay () const
void	setShowDebugOverlay (bool showDebugOverlay )

通知程序信号：

void	showDebugOverlayChanged (bool showDebugOverlay )

surface : QObject *

Holds the current render surface.

访问函数：

QObject *	surface () const
void	setSurface (QObject * surface )

通知程序信号：

void	surfaceChanged (QObject * surface )

viewportRect : QRectF

Holds the current normalized viewport rectangle.

访问函数：

QRectF	viewportRect () const
void	setViewportRect (const QRectF & viewportRect )

通知程序信号：

void	viewportRectChanged (const QRectF & viewportRect )