desc.geometry.FourierRZCurve.compute_frenet_frame

FourierRZCurve.compute_frenet_frame(R_n=None, Z_n=None, grid=None, basis='rpz')[source]

Compute Frenet frame vectors using specified coefficients.

Parameters:

  • R_n (array-like) – fourier coefficients for R, Z. Defaults to self.R_n, self.Z_n

  • Z_n (array-like) – fourier coefficients for R, Z. Defaults to self.R_n, self.Z_n

  • grid (Grid or array-like) – toroidal coordinates to compute at. Defaults to self.grid

  • basis ({"rpz", "xyz"}) – basis vectors to use for Frenet vector representation

Returns:

T, N, B (ndarrays, shape(k,3)) – tangent, normal, and binormal vectors of the curve at specified grid locations in phi