PyFFD

PyFFD is an open-source Free Form Deformation (FFD) library.

Code

Quick start

(1) Define a FEM mesh :

n = np.array([[x0, y0], [x1, y1], ...])

(2) Define the elements size and degree for the B-Spline box in each direction :

# Element size per directions
size = [size_x, size_y]
# global setting
size = 0.1 # example

# Element degree per directions
deg = [deg_x, deg_y]
# global setting
deg = 3 # example

(3) Create the B-Spline box python object :

sbox = pf.FFD(n, size, deg)

(4) Compute the FFD opperator $R_s$ :

Rs = sbox.OperatorFFD()