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@blacktaxi
Created January 7, 2012 19:32
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Generating random points inside a circle
import random
random.seed()
import math
def rnd(_from=0, _to=1): return _from + random.random() * (_to - _from)
def rectangle_random(W=2, H=2):
return (rnd(0, W), rnd(0, H))
def triangle_random(W=2, H=2):
p = rectangle_random(W, H)
return p if p[0]/W <= p[1]/H else (W-p[0], H-p[1])
def circle_random(R=5):
p = triangle_random(R, R)
r = p[1]
a = p[0]/p[1] * 2 * math.pi
return (r * math.cos(a), r * math.sin(a))
def random_points_array(point_func, number=5000):
return [point_func() for _ in xrange(number)]
def plot_array(points):
import matplotlib.pyplot as plt
plt.plot([p[0] for p in points], [p[1] for p in points], 'ro')
plt.show()
#
plot_array(random_points_array(circle_random))
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