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"""Add a trailing line to a moving object"""
from vedo import Plotter, sin, Sphere, Point
s = Sphere().c("green").bc("tomato")
s.cut_with_plane([-0.8, 0, 0]) # cut left part of sphere
p = Point([-2,0,0]).ps(12).color("black")
# Add a finite-length trail to visualize recent trajectory.
p.add_trail(lw=3, n=50)
plt = Plotter(axes=6, interactive=False)
plt.show(s, p, __doc__)
for i in range(150):
p.pos(-2+i/100.0, sin(i/5.0)/15, 0).update_trail()
plt.azimuth(-0.2)
plt.render()
# stay interactive and after pressing q close
plt.interactive().close()
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