class QAxisAccumulator¶

QAxisAccumulator processes velocity or acceleration data from a QAxis . More…

Synopsis¶

Properties¶

scaleᅟ
sourceAxisᅟ
sourceAxisTypeᅟ
valueᅟ
velocityᅟ

Methods¶

def __init__()
def scale()
def sourceAxis()
def sourceAxisType()
def value()
def velocity()

Slots¶

def setScale()
def setSourceAxis()
def setSourceAxisType()

Note

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Detailed Description¶

Constructs a new QAxisAccumulator instance with parent.

A QAxis reports the current position of an axis on an input device. When the axis is returned to its neutral position the value of that axis returns to 0. Often, it is required to have the input from an axis control a variable in other ways, for example treating the value from the QAxis as a velocity (first derivative with respect to time) or as an acceleration (second derivative with respect to time). This can be done with user code or with a QFrameAction but those approached are not ideal as they add more work to the main thread and are inherently imperative. The QAxisAccumulator class allows for this common task to be performed on the Qt 3D backend and be specified in a declarative manner.

class SourceAxisType¶

Constant	Description
Qt3DInput.QAxisAccumulator.Velocity
Qt3DInput.QAxisAccumulator.Acceleration

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property scaleᅟ: float¶

Access functions:

scale()
setScale()
Signal scaleChanged()

property sourceAxisᅟ: QAxis¶

Access functions:

sourceAxis()
setSourceAxis()
Signal sourceAxisChanged()

property sourceAxisTypeᅟ: Qt3DInput.QAxisAccumulator.SourceAxisType¶

Access functions:

sourceAxisType()
setSourceAxisType()
Signal sourceAxisTypeChanged()

property valueᅟ: float¶

Returns the accumulated (integrated) value.

Access functions:

value()
Signal valueChanged()

property velocityᅟ: float¶

Access functions:

velocity()
Signal velocityChanged()

__init__([parent=None])¶

Parameters:: parent – QNode

Constructs a new QAxisAccumulator instance with parent parent.

scale()¶

Return type:: float

The amount to scale the axis value by when accumulating. This can be thought of as the maximum velocity or acceleration the axis can control.

Returns the amount the input axis values are scaled by.

See also

setScale()

Getter of property scaleᅟ .

scaleChanged(scale)¶

Parameters:: scale – float

Notification signal of property scaleᅟ .

setScale(scale)¶

Parameters:: scale – float