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# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
# -----------------------------------------------------------------------------
"""
This example demonstrates how to create a sphere.
"""
import imageio
from vispy import scene
from vispy.visuals.transforms import STTransform
output_filename = 'animation.gif'
n_steps = 18
step_angle = 10.
axis = [0, 0.707, 0.707]
canvas = scene.SceneCanvas(keys='interactive', bgcolor='white',
size=(800, 600), show=True)
view = canvas.central_widget.add_view()
view.camera = 'arcball'
sphere1 = scene.visuals.Sphere(radius=1, method='latitude', parent=view.scene,
edge_color='black')
sphere2 = scene.visuals.Sphere(radius=1, method='ico', parent=view.scene,
edge_color='black')
sphere3 = scene.visuals.Sphere(radius=1, rows=10, cols=10, depth=10,
method='cube', parent=view.scene,
edge_color='black')
sphere1.transform = STTransform(translate=[-2.5, 0, 0])
sphere3.transform = STTransform(translate=[2.5, 0, 0])
view.camera.set_range(x=[-3, 3])
writer = imageio.get_writer('animation.gif')
for i in range(n_steps * 2):
im = canvas.render()
writer.append_data(im)
if i >= n_steps:
view.camera.transform.rotate(step_angle, axis)
else:
view.camera.transform.rotate(-step_angle, axis)
writer.close()
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