pyvista.plotting.widgets.AffineWidget3D

class AffineWidget3D(plotter, actor, origin=None, start=True, scale=0.15, line_radius=0.02, always_visible=True, axes_colors=None, axes=None, release_callback=None, interact_callback=None)

3D affine transform widget.

This widget allows interactive transformations including translation and rotation using the left mouse button.

Parameters:

plotterpyvista.Plotter

The plotter object.

actorpyvista.Actor

The actor to which the widget is attached to.

originsequence[float], optional

Origin of the widget. Default is the center of the main actor.

startbool, default: True

If True, start the widget immediately.

scalefloat, default: 0.15

Scale factor for the widget relative to the length of the actor.

line_radiusfloat, default: 0.02

Relative radius of the lines composing the widget.

always_visiblebool, default: True

Make the widget always visible. Setting this to False will cause the widget geometry to be hidden by other actors in the plotter.

axes_colorstuple[ColorLike], optional

Uses the theme by default. Configure the individual axis colors by modifying either the theme with pyvista.global_theme.axes.x_color = <COLOR> or setting this with a tuple as in ('r', 'g', 'b').

axesnumpy.ndarray, optional

(3, 3) Numpy array defining the X, Y, and Z axes. By default this matches the default coordinate system.

release_callbackcallable(), optional

Call this method when releasing the left mouse button. It is passed the user_matrix of the actor.

interact_callbackcallable(), optional

Call this method when moving the mouse with the left mouse button pressed down and a valid movement actor selected. It is passed the user_matrix of the actor.

Notes

After interacting with the actor, the transform will be stored within pyvista.Actor.user_matrix but will not be applied to the dataset. Use this matrix in conjunction with pyvista.DataSetFilters.transform() to transform the dataset.

Requires VTK >= v9.2

Examples

Create the affine widget outside of the plotter and add it.

>>> import pyvista as pv
>>> pl = pv.Plotter()
>>> actor = pl.add_mesh(pv.Sphere())
>>> widget = pv.AffineWidget3D(pl, actor)
>>> pl.show()

Static Scene

Interactive Scene

Access the transform from the actor.

>>> actor.user_matrix
array([[1., 0., 0., 0.],
       [0., 1., 0., 0.],
       [0., 0., 1., 0.],
       [0., 0., 0., 1.]])

Methods

AffineWidget3D.disable()	Disable the widget.
AffineWidget3D.enable()	Enable the widget.
AffineWidget3D.remove()	Disable and delete all actors of this widget.

Attributes

AffineWidget3D.axes	Return or set the axes of the widget.
AffineWidget3D.origin	Origin of the widget.