QML frontend for the Qt3DInput::QAxisAccumulator C++ 类。 更多...
| import 语句： | import Qt3D.Input 2.7 |
| 实例化： | QAxisAccumulator |
An Axis 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 Axis 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 FrameAction but those approached are not ideal as they add more work to the main thread and are inherently imperative. The AxisAccumulator class allows for this common task to be performed on the Qt 3D backend and be specified in a declarative manner.
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sourceAxis : Axis |
The Axis for which the accumulator should integrate axis values.
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sourceAxisType : SourceAxisType |
The sourceAxisType property specifies how the accumulator treats the values from the source axis.
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value
:
real
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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.
