Note
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Rotations#
Rotations of a mesh about its axes. In this model, the x axis is from the left to right; the y axis is from bottom to top; and the z axis emerges from the image. The camera location is the same in all four images.
from __future__ import annotations
import pyvista as pv
from pyvista import examples
Define camera and axes#
Define camera and axes. Setting axes origin to (3.0, 3.0, 3.0)
.
mesh = examples.download_cow()
mesh.points /= 1.5 # scale the mesh
camera = pv.Camera()
camera.position = (30.0, 30.0, 30.0)
camera.focal_point = (5.0, 5.0, 5.0)
axes = pv.Axes(show_actor=True, actor_scale=2.0, line_width=5)
axes.origin = (3.0, 3.0, 3.0)
Original Mesh#
Plot original mesh. Add axes actor to Plotter.
p = pv.Plotter()
p.add_text('Mesh', font_size=24)
p.add_actor(axes.actor)
p.camera = camera
p.add_mesh(mesh)
p.show()

Rotation about the x axis#
Plot the mesh rotated about the x axis every 60 degrees. Add the axes actor to the Plotter and set the axes origin to the point of rotation.
p = pv.Plotter()
p.add_text('X-Axis Rotation', font_size=24)
p.add_actor(axes.actor)
p.camera = camera
for i in range(6):
rot = mesh.rotate_x(60 * i, point=axes.origin, inplace=False)
p.add_mesh(rot)
p.show()

Rotation about the y axis#
Plot the mesh rotated about the y axis every 60 degrees. Add the axes actor to the Plotter and set the axes origin to the point of rotation.
p = pv.Plotter()
p.add_text('Y-Axis Rotation', font_size=24)
p.camera = camera
p.add_actor(axes.actor)
for i in range(6):
rot = mesh.rotate_y(60 * i, point=axes.origin, inplace=False)
p.add_mesh(rot)
p.show()

Rotation about the z axis#
Plot the mesh rotated about the z axis every 60 degrees. Add axes actor to the Plotter and set the axes origin to the point of rotation.
p = pv.Plotter()
p.add_text('Z-Axis Rotation', font_size=24)
p.camera = camera
p.add_actor(axes.actor)
for i in range(6):
rot = mesh.rotate_z(60 * i, point=axes.origin, inplace=False)
p.add_mesh(rot)
p.show()

Rotation about a custom vector#
Plot the mesh rotated about a custom vector every 60 degrees. Add the axes actor to the Plotter and set axes origin to the point of rotation.
p = pv.Plotter()
p.add_text('Custom Vector Rotation', font_size=24)
p.camera = camera
p.add_actor(axes.actor)
for i in range(6):
rot = mesh.copy()
rot.rotate_vector(vector=(1, 1, 1), angle=60 * i, point=axes.origin)
p.add_mesh(rot)
p.show()

Total running time of the script: (0 minutes 1.956 seconds)