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Metadata-Version: 2.4
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Name: pytweening
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Version: 1.2.0
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Summary: A collection of tweening (aka easing) functions.
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Home-page: https://github.com/asweigart/pytweening
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Author: Al Sweigart
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Author-email: al@inventwithpython.com
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License: MIT
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Keywords: 2D animation tween tweening easing
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Classifier: Development Status :: 5 - Production/Stable
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Classifier: Environment :: Win32 (MS Windows)
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Classifier: Environment :: X11 Applications
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Classifier: Environment :: MacOS X
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Classifier: Intended Audience :: Developers
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Classifier: Operating System :: OS Independent
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Classifier: License :: OSI Approved :: MIT License
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Classifier: Programming Language :: Python
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Classifier: Programming Language :: Python :: 2
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Classifier: Programming Language :: Python :: 2.7
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Classifier: Programming Language :: Python :: 3
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Classifier: Programming Language :: Python :: 3.4
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Classifier: Programming Language :: Python :: 3.5
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Classifier: Programming Language :: Python :: 3.6
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Classifier: Programming Language :: Python :: 3.7
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Classifier: Programming Language :: Python :: 3.8
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Classifier: Programming Language :: Python :: 3.9
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Classifier: Programming Language :: Python :: 3.10
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Classifier: Programming Language :: Python :: 3.11
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Classifier: Programming Language :: Python :: 3.12
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Description-Content-Type: text/markdown
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License-File: LICENSE.txt
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License-File: AUTHORS.txt
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Dynamic: author
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Dynamic: author-email
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Dynamic: classifier
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Dynamic: description
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Dynamic: description-content-type
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Dynamic: home-page
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Dynamic: keywords
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Dynamic: license
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Dynamic: license-file
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Dynamic: summary
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PyTweening
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==========
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A collection of tweening (aka easing) functions implemented in Python. You can learn more about it in this blog post: https://inventwithpython.com/blog/2024/02/20/make-lively-movement-animation-with-pytweenings-tweening-functions/ and in the Nordic Game Jam talk by Martin Jonasson and Petri Purho at https://youtu.be/Fy0aCDmgnxg?si=8pgITaxjJSKFyBuB&t=159
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Example Usage
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=============
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All tweening functions are passed an argument of a float from 0.0 (the beginning of the path) to 1.0 (the end of the path) of the tween:
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>>> pytweening.linear(0.5)
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0.5
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>>> pytweening.linear(0.75)
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0.75
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>>> pytweening.linear(1.0)
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1.0
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>>> pytweening.easeInQuad(0.5)
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0.25
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>>> pytweening.easeInQuad(0.75)
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0.5625
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>>> pytweening.easeInQuad(1.0)
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1.0
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>>> pytweening.easeInOutSine(0.75)
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0.8535533905932737
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>>> pytweening.easeInOutSine(1.0)
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1.0
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The getLine() function also provides a Bresenham line algorithm implementation:
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>>> pytweening.getLine(0, 0, 5, 10)
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[(0, 0), (0, 1), (1, 2), (1, 3), (2, 4), (2, 5), (3, 6), (3, 7), (4, 8), (4, 9), (5, 10)]
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The getLinePoint() function finds (interpolates) a point on the given line (even if it extends before or past the start or end points):
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>>> getLinePoint(0, 0, 5, 10, 0.0)
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(0.0, 0.0)
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>>> getLinePoint(0, 0, 5, 10, 0.25)
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(1.25, 2.5)
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>>> getLinePoint(0, 0, 5, 10, 0.5)
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(2.5, 5.0)
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>>> getLinePoint(0, 0, 5, 10, 0.75)
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(3.75, 7.5)
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>>> getLinePoint(0, 0, 5, 10, 1.0)
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(5.0, 10.0)
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PyTweening also provides iterators to get the XY coordinates in a for loop between two points (though some floating-point rounding errors naturally occur):
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>>> import pytweening
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>>> for x, y in pytweening.iterLinear(0, 0, 100, 150, 0.1): print(x, y)
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...
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0.0 0.0
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10.0 15.0
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20.0 30.0
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30.000000000000004 45.00000000000001
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40.0 60.0
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50.0 75.0
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60.0 90.0
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70.0 105.0
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80.0 119.99999999999999
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89.99999999999999 135.0
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100.0 150.0
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>>> for x, y in pytweening.iterEaseOutQuad(0, 0, 100, 150, 0.1): print(x, y)
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...
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0.0 0.0
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19.0 28.5
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36.00000000000001 54.00000000000001
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51.0 76.5
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64.00000000000001 96.00000000000001
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75.0 112.5
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84.0 126.0
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90.99999999999999 136.5
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96.00000000000001 144.0
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99.0 148.5
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100.0 150.0
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Tweens
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======
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pytweening.linear()
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pytweening.easeInQuad()
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pytweening.easeOutQuad()
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pytweening.easeInOutQuad()
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pytweening.easeInCubic()
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pytweening.easeOutCubic()
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pytweening.easeInOutCubic()
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pytweening.easeInQuart()
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pytweening.easeOutQuart()
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pytweening.easeInOutQuart()
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pytweening.easeInQuint()
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pytweening.easeOutQuint()
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pytweening.easeInOutQuint()
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pytweening.easeInSine()
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pytweening.easeOutSine()
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pytweening.easeInOutSine()
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pytweening.easeInExpo()
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pytweening.easeOutExpo()
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pytweening.easeInOutExpo()
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pytweening.easeInCirc()
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pytweening.easeOutCirc()
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pytweening.easeInOutCirc()
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pytweening.easeInElastic()
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pytweening.easeOutElastic()
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pytweening.easeInOutElastic()
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pytweening.easeInBack()
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pytweening.easeOutBack()
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pytweening.easeInOutBack()
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pytweening.easeInBounce()
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pytweening.easeOutBounce()
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pytweening.easeInOutBounce()
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pytweening.easeInPoly() (default degree of 2)
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pytweening.easeOutPoly() (default degree of 2)
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pytweening.easeInOutPoly() (default degree of 2)
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Support
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-------
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If you find this project helpful and would like to support its development, [consider donating to its creator on Patreon](https://www.patreon.com/AlSweigart).
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marco