README.md

WApy(Weiler-Atherton clipping algorithm in python)

This rep is python implementation of Weiler-Atherton clipping algorithm.

Reference:https://www.cnblogs.com/lsxqw2004/p/4843417.html

Reference rep:https://github.com/lsxqw2004/blog_sample_codes

How to use?

Just copy the python file into the path of your project and import:

from PolygonCut import *

The two Polygons you input should be like this:

#"x y x y ... x y" in clockwise by Default, otherwise transform to clockwise
S = "161 137 429 376 558 192 619 418 281 431"
C = "183 391 224 240 610 107 657 361 429 376"

Then get the clipped Polygons:

result = PolyClipping(S, C)			# True by default
#result = PolyClipping(S, C, False) # if you want anticlockwise output

The format of result should be like this:

#"x y x y ... x y" in clockwise by Default
["261.867222 226.952486 429.000000 376.000000 262.690141 386.140845 215.627162 270.836548 224.000000 240.000000",
"429.000000 376.000000 558.000000 192.000000 604.546479 364.450890"]

Moreover： The coordinate frame is:

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