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@ -236,12 +236,16 @@ class Arc(Shape, metaclass=AutoSlots):
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if poly_max_arclen is not None:
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n += [perimeter / poly_max_arclen]
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num_points = int(round(max(n)))
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thetas_inner = numpy.linspace(a_ranges[0][1], a_ranges[0][0], num_points, endpoint=True)
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wh = self.width / 2.0
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if wh == r0 and r0 == r1:
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thetas_inner = [0] # Don't generate multiple vertices if we're at the origin
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else:
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thetas_inner = numpy.linspace(a_ranges[0][1], a_ranges[0][0], num_points, endpoint=True)
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thetas_outer = numpy.linspace(a_ranges[1][0], a_ranges[1][1], num_points, endpoint=True)
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sin_th_i, cos_th_i = (numpy.sin(thetas_inner), numpy.cos(thetas_inner))
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sin_th_o, cos_th_o = (numpy.sin(thetas_outer), numpy.cos(thetas_outer))
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wh = self.width / 2.0
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xs1 = (r0 + wh) * cos_th_o
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ys1 = (r1 + wh) * sin_th_o
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