QGraphicsRotation¶
The
QGraphicsRotation
class provides a rotation transformation around a given axis. More…
New in version 4.6.
Detailed Description¶
You can provide the desired axis by assigning a
QVector3D
to the axis property or by passing a member ifAxis
to thesetAxis
convenience function. By default the axis is (0, 0, 1) i.e., rotation around the Z axis.The angle property, which is provided by
QGraphicsRotation
, now describes the number of degrees to rotate around this axis.
QGraphicsRotation
provides certain parameters to help control how the rotation should be applied.The origin is the point that the item is rotated around (i.e., it stays fixed relative to the parent as the rest of the item is rotated). By default the origin is
QPointF
(0, 0).The angle property provides the number of degrees to rotate the item clockwise around the origin. This value also be negative, indicating a counterclockwise rotation. For animation purposes it may also be useful to provide rotation angles exceeding (360, 360) degrees, for instance to animate how an item rotates several times.
Note: the final rotation is the combined effect of a rotation in 3D space followed by a projection back to 2D. If several rotations are performed in succession, they will not behave as expected unless they were all around the Z axis.
See also
QGraphicsTransform
setRotation()
rotate()

class
QGraphicsRotation
([parent=None])¶  param parent
QObject
Constructs a new
QGraphicsRotation
with the givenparent
.

PySide2.QtWidgets.QGraphicsRotation.
angle
()¶  Return type
qreal
See also

PySide2.QtWidgets.QGraphicsRotation.
angleChanged
()¶

PySide2.QtWidgets.QGraphicsRotation.
axisChanged
()¶

PySide2.QtWidgets.QGraphicsRotation.
origin
()¶  Return type
QVector3D
See also

PySide2.QtWidgets.QGraphicsRotation.
originChanged
()¶

PySide2.QtWidgets.QGraphicsRotation.
setAxis
(axis)¶  Parameters
axis –
Axis
Convenience function to set the axis to
axis
.Note: the
YAxis
rotation forQTransform
is inverted from the correct mathematical rotation in 3D space. TheQGraphicsRotation
class implements a correct mathematical rotation. The following two sequences of code will perform the same transformation:QTransform t; t.rotate(45, Qt::YAxis); QGraphicsRotation r; r.setAxis(Qt::YAxis); r.setAngle(45);

PySide2.QtWidgets.QGraphicsRotation.
setAxis
(axis)  Parameters
axis –
QVector3D
© 2018 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.