PySide6.QtSensors.QRotationReading

class QRotationReading

The QRotationReading class represents one reading from the rotation sensor. More…

Inheritance diagram of PySide6.QtSensors.QRotationReading

Synopsis

Properties

  • xᅟ - The rotation around the x axis

  • yᅟ - The rotation around the y axis

  • zᅟ - The rotation around the z axis

Methods

Note

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Detailed Description

QRotationReading Units

The rotation reading contains 3 angles, measured in degrees that define the orientation of the device in three-dimensional space. These angles are similar to yaw, pitch and roll but are defined using only right hand rotation with axes as defined by the right hand cartesian coordinate system.

../../_images/sensors-rotation.jpg

The three angles are applied to the device in the following order.

  • Right-handed rotation z (-180, 180]. Starting from the y-axis and incrementing in the counter-clockwise direction.

  • Right-handed rotation x [-90, 90]. Starting from the new (once-rotated) y-axis and incrementing towards the z-axis.

  • Right-handed rotation y (-180, 180]. Starting from the new (twice-rotated) z-axis and incrementing towards the x-axis.

Here is a visualization showing the order in which angles are applied.

../../_images/sensors-rotation-anim.gif

The 0 point for the z angle is defined as a fixed, external entity and is device-specific. While magnetic North is typically used as this reference point it may not be. Do not attempt to compare values for the z angle between devices or even on the same device if it has moved a significant distance.

If the device cannot detect a fixed, external entity the z angle will always be 0 and the hasZ property will be set to false.

The 0 point for the x and y angles are defined as when the x and y axes of the device are oriented towards the horizon. Here is an example of how the x value will change with device movement.

../../_images/sensors-rotation2.jpg

Here is an example of how the y value will change with device movement.

../../_images/sensors-rotation3.jpg

Note that when x is 90 or -90, values for z and y achieve rotation around the same axis (due to the order of operations). In this case the y rotation will be 0.

Note

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

property xᅟ: float

This property holds the rotation around the x axis..

Measured as degrees.

See also

QRotationReading Units

Access functions:
property yᅟ: float

This property holds the rotation around the y axis..

Measured as degrees.

See also

QRotationReading Units

Access functions:
property zᅟ: float

This property holds the rotation around the z axis..

Measured as degrees.

See also

QRotationReading Units

Access functions:
__init__(parent)
Parameters:

parent – QObject

setFromEuler(x, y, z)
Parameters:

  • x – float

  • y – float

  • z – float

Sets the rotation from three euler angles.

This is to be called from the backend.

The angles are measured in degrees. The order of the rotations matters, as first the z rotation is applied, then the x rotation and finally the y rotation.

x()
Return type:

float

Getter of property xᅟ .

y()
Return type:

float

Getter of property yᅟ .

z()
Return type:

float

Getter of property zᅟ .