easing.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Created by aneasystone on 2018/3/13
import pylab as pl


# https://github.com/gdsmith/jquery.easing/blob/master/jquery.easing.js
def ease_in_quad(x):
    return x * x


def ease_out_quad(x):
    return 1 - (1 - x) * (1 - x)


def get_tracks(ease_func):
    ts = []
    if ease_func in globals():
        ease = globals()[ease_func]
        for i in range(100):
            ts.append(ease(i/100.0))
    return ts


tracks = get_tracks('ease_out_quad')
print(tracks)
plot2 = pl.plot(range(len(tracks)), tracks, 'r')
pl.show()