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# Rotate a line

I want to simulate the minute hand of a clock and am doing so by multiplying the other line vertex with the rotation matrix. Is there a simpler way e.g. rotating the actual graphic object symbolically?

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## 1 Answer

Sort by » oldest newest most voted This is a situation where using polar coordinates can be quite helpful. Hope the code below helps.

def sec_to_rad( n ):
theta = 2*n*pi/60
return (sin(theta),cos(theta))

sum([line([(0,0),sec_to_rad(i)],axes=False)+text("{}".format(i),sec_to_rad(i)) for i in range(60)]).show(aspect_ratio=1)


To see above in action see here.

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## Comments

Hey - Thanks so much for taking the time to answer. Nice one-liner too. Gratefully.

@dyfroedd: you are welcome. You can also mark my answer as accepted too if it did respond your question ;-)

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## Stats

Asked: 2015-10-06 00:28:10 +0200

Seen: 340 times

Last updated: Oct 06 '15