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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	2.39 KB	-rw-r--r--
attr.py	7.99 KB	-rw-r--r--
color.py	38.75 KB	-rw-r--r--
conversions.py	12.96 KB	-rw-r--r--
deltae.py	7.06 KB	-rw-r--r--
easings.py	2.44 KB	-rw-r--r--
tables.py	15.02 KB	-rw-r--r--
types.py	9.9 KB	-rw-r--r--

Code Editor : easings.py

# vim: set et sw=4 sts=4 fileencoding=utf-8:
#
# The colorzero color library
# Copyright (c) 2016-2018 Dave Jones <dave@waveform.org.uk>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the copyright holder nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

"Defines various easing functions for :meth:`Color.gradient`."

from __future__ import (
    unicode_literals,
    print_function,
    division,
    absolute_import,
)

from collections import namedtuple

def linear(steps):
    "Linear easing function; yields *steps* values between 0.0 and 1.0"
    for t in range(steps):
        yield t / (steps - 1)

def ease_in(steps):
    "Quadratic ease-in function; yields *steps* values between 0.0 and 1.0"
    for t in linear(steps):
        yield t ** 2

def ease_out(steps):
    "Quadratic ease-out function; yields *steps* values between 0.0 and 1.0"
    for t in linear(steps):
        yield t * (2 - t)

def ease_in_out(steps):
    "Quadratic ease-in-out function; yields *steps* values between 0.0 and 1.0"
    for t in linear(steps):
        yield 2 * t * t if t < 0.5 else (4 - 2 * t) * t - 1

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Code Editor : easings.py