fixed cubic-hermite eqn

[wkpark]

fixed invalid cubic-hermite equations

import numpy as np

def plot(scale):
    # fake cubic hermite
    x = np.linspace(0, 1, 25)
    x2 = x*x
    x3 = x2 * x
    S = 100/24.
    y = (x3-2*x2+x)*S + (-2*x3+3*x2) + (x3-x2)*S # correct equation. You can get exactly the same result found at csv/*.tsv
    y = y * scale
    tmp = "FAKE_CUBIC_HERMITE   0," + ",".join(map(lambda x: str(int(x)) if x == int(x) else str(x), y))
    print(tmp)

    tmp = "FAKE_REVERSE_CUBIC_HERMITE   0," + ",".join(map(lambda x: str(int(x)) if x == int(x) else str(x), 1-y))
    print(tmp)

plot(1.0)

See also PR #4