zero k=0 values
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@ -188,6 +188,11 @@ def far_to_nearfield(E_far: fdfield_t,
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sin_th[numpy.logical_and(kx == 0, ky == 0)] = 0
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cos_th[numpy.logical_and(kx == 0, ky == 0)] = 1
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theta = numpy.arctan2(ky, kx)
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phi = numpy.arccos(cos_phi)
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theta[numpy.logical_and(kx == 0, ky == 0)] = 0
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phi[numpy.logical_and(kx == 0, ky == 0)] = 0
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# Zero fields beyond valid (phi, theta)
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invalid_ind = kxy2 >= k * k
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theta[invalid_ind] = 0
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