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  2. Qt 6.5.1
  3. Qt 3D
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  5. Qt3DRender
  6. QComputeCommand

QComputeCommand Class

class Qt3DRender ::QComputeCommand

QComponent to issue work for the compute shader on GPU. 更多...

头： #include <QComputeCommand>
CMake: find_package(Qt6 REQUIRED COMPONENTS 3drender)
target_link_libraries(mytarget PRIVATE Qt6::3drender)
qmake: QT += 3drender
实例化： ComputeCommand
继承： Qt3DCore::QComponent

特性

公共函数

QComputeCommand (Qt3DCore::QNode * parent = nullptr)
Qt3DRender::QComputeCommand::RunType runType () const
int workGroupX () const
int workGroupY () const
int workGroupZ () const

公共槽

void setRunType (Qt3DRender::QComputeCommand::RunType runType )
void setWorkGroupX (int workGroupX )
void setWorkGroupY (int workGroupY )
void setWorkGroupZ (int workGroupZ )
void trigger (int frameCount = 1)
void trigger (int workGroupX , int workGroupY , int workGroupZ , int frameCount = 1)

信号

void runTypeChanged ()
void workGroupXChanged ()
void workGroupYChanged ()
void workGroupZChanged ()

详细描述

A Qt3DRender::QComputeCommand is used to issue work for the compute shader. The compute shader is specified in the QMaterial component of the same entity the QComputeCommand is added to. The workGroupX , workGroupY and workGroupZ properties specify the work group sizes for the compute shader invocation. Qt3DRender::QDispatchCompute node needs to be present in the FrameGraph to actually issue the commands.

注意： If the rendering policy is set to Qt3DRender::QRenderSettings::OnDemand and there are no changes to the scene, the ComputeCommand will not be invoked repeatedly. The Qt3DRender::QRenderSettings::Always render policy must be set for the ComputeCommand to be repeatedly invoked if there are no other changes to the scene that triggers rendering a new frame.

特性文档编制

runType : RunType

Specifies whether the compute command should be performed every frame or manually triggered.

If set to Continuous, Compute command is executed everyframe. This is the default.

If set to Manual CompouteCommand is executed for a given number of frames and then the component disables itself.

访问函数：

Qt3DRender::QComputeCommand::RunType runType () const
void setRunType (Qt3DRender::QComputeCommand::RunType runType )

通知程序信号：

void runTypeChanged ()

workGroupX : int

Specifies X workgroup size.

访问函数：

int workGroupX () const
void setWorkGroupX (int workGroupX )

通知程序信号：

void workGroupXChanged ()

workGroupY : int

Specifies Y workgroup size.

访问函数：

int workGroupY () const
void setWorkGroupY (int workGroupY )

通知程序信号：

void workGroupYChanged ()

workGroupZ : int

Specifies Z workgroup size.

访问函数：

int workGroupZ () const
void setWorkGroupZ (int workGroupZ )

通知程序信号：

void workGroupZChanged ()

成员函数文档编制

[explicit] QComputeCommand:: QComputeCommand ( Qt3DCore::QNode * parent = nullptr)

The constructor creates a new Qt3DRender::QComputeCommand instance with the specified parent .

[slot] void QComputeCommand:: setWorkGroupX ( int workGroupX )

Sets the workgroup for the first dimension to workGroupX .

注意： setter 函数对于特性 workGroupX .

另请参阅 workGroupX ().

[slot] void QComputeCommand:: setWorkGroupY ( int workGroupY )

Sets the workgroup for the second dimension to workGroupY .

注意： setter 函数对于特性 workGroupY .

另请参阅 workGroupY ().

[slot] void QComputeCommand:: setWorkGroupZ ( int workGroupZ )

Sets the workgroup for the third dimension to workGroupZ .

注意： setter 函数对于特性 workGroupZ .

另请参阅 workGroupZ ().

[slot] void QComputeCommand:: trigger ( int frameCount = 1)

When the run type is set to Manual, calling trigger will make the compute command be executed for the next frameCount frames. Upon completion of the execution, the enabled property will be set to false.

[slot] void QComputeCommand:: trigger ( int workGroupX , int workGroupY , int workGroupZ , int frameCount = 1)

When the run type is set to Manual, calling trigger will make the compute command be executed for the next frameCount frames. Upon completion of the execution, the enabled property will be set to false. The size of the workgroup previously set will be overridden with workGroupX , workGroupY , workGroupZ .

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