QComputeCommand

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

Synopsis

Functions

Slots

Detailed Description

A 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. QDispatchCompute node needs to be present in the FrameGraph to actually issue the commands.

Note

If the rendering policy is set to OnDemand and there are no changes to the scene, the ComputeCommand will not be invoked repeatedly. The 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.

class PySide2.Qt3DRender.QComputeCommand([parent=None])
param parent

PySide2.Qt3DCore.QNode

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

PySide2.Qt3DRender.QComputeCommand.RunType

New in version 5.13.

PySide2.Qt3DRender.QComputeCommand.runType()
Return type

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.

PySide2.Qt3DRender.QComputeCommand.runTypeChanged()
PySide2.Qt3DRender.QComputeCommand.setRunType(runType)
Parameters

runTypeRunType

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.

PySide2.Qt3DRender.QComputeCommand.setWorkGroupX(workGroupX)
Parameters

workGroupX – int

Specifies X workgroup size.

PySide2.Qt3DRender.QComputeCommand.setWorkGroupY(workGroupY)
Parameters

workGroupY – int

Specifies Y workgroup size.

PySide2.Qt3DRender.QComputeCommand.setWorkGroupZ(workGroupZ)
Parameters

workGroupZ – int

Specifies Z workgroup size.

PySide2.Qt3DRender.QComputeCommand.trigger([frameCount=1])
Parameters

frameCount – int

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.

PySide2.Qt3DRender.QComputeCommand.trigger(workGroupX, workGroupY, workGroupZ[, frameCount=1])
Parameters
  • workGroupX – int

  • workGroupY – int

  • workGroupZ – int

  • frameCount – int

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 .

PySide2.Qt3DRender.QComputeCommand.workGroupX()
Return type

int

Specifies X workgroup size.

PySide2.Qt3DRender.QComputeCommand.workGroupXChanged()
PySide2.Qt3DRender.QComputeCommand.workGroupY()
Return type

int

Specifies Y workgroup size.

PySide2.Qt3DRender.QComputeCommand.workGroupYChanged()
PySide2.Qt3DRender.QComputeCommand.workGroupZ()
Return type

int

Specifies Z workgroup size.

PySide2.Qt3DRender.QComputeCommand.workGroupZChanged()