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WiwilZ/calc_polygon_area.py

Created March 27, 2025 13:24
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calc_polygon_area.py
def calc_polygon_area(points):
assert len(points) >= 3
area = 0
for i in range(len(points) - 1):
x1, y1 = points[i]
x2, y2 = points[i + 1]
area += (y1 + y2) * (x2 - x1)
x1, y1 = points[-1]
x2, y2 = points[0]
area += (y1 + y2) * (x2 - x1)
return abs(-area * 0.5)
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