clenspy.selection.geometry.sigmoid_theta

clenspy.selection.geometry.sigmoid_theta(theta, theta_lob, damping=2.5, theta0_frac=0.5)

Sigmoid transition \(\sigma(\theta) = [1 + e^{-k(\theta - \theta_0)}]^{-1}\) with \(k = {\rm damping}/\theta_\lambda\), \(\theta_0 = \theta_\lambda/2\) (Costanzi 2026 eq. 6).

Parameters:

• damping (float)

• theta0_frac (float)