This function returns a Curve transformation: It takes an x-value x0, a
y-value y0 and a z-value z0, as arguments and
returns a Curve transformation that takes a Curve as argument and returns a
new Curve, by translating the original by x0 in x-direction, y0 in
y-direction and z0 in z-direction.
This function returns a Curve transformation: It takes an x-value x0, a y-value y0 and a z-value z0, as arguments and returns a Curve transformation that takes a Curve as argument and returns a new Curve, by translating the original by x0 in x-direction, y0 in y-direction and z0 in z-direction.