normal

Spline.normal(t, frame='bishop', initial_vector=None)

Returns the normal vector for 1D and 2D splines. The normal vector points to the right of the spline when facing in the direction of increasing t.

Parameters

tfloat or numpy array

The parameter value(s) for which the normal vector(s) are computed.

frame“bishop” | “frenet”

The type of frame used for 3D curves.

initial_vectornumpy array

Fixes the initial orientation of the normals at position t[0].

Returns

normalsnumpy array

The normal vectors.