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# Take collection of circles, see which overlap then plot the shapes with the amended overlaps.
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from shapely.geometry import Polygon, Point
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from shapely.ops import cascaded_union
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from matplotlib import pyplot
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from shapely.validation import explain_validity
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# definses one polygon square.
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plist = [[(0, 0), (0, 2), (2, 2),(2,0), (0,0)],[(0,1),(5,1),(5,1.5),(0,1.5),(0,1)]]
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# Take the points given and creates polygons.
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polygons = [Polygon(plist[0]),Polygon(plist[1] ) ]
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# See which circles overlap and store in list.
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for n in range(len(polygons) - 1):
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if polygons[n].intersects(polygons[n+1]) == True:
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# Two if statements to make sure the same polygon isn't being entered more than once.
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if polygons[n] not in overlapping: overlapping.append(polygons[n])
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if polygons[n + 1] not in overlapping: overlapping.append(polygons[n + 1])
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# Create a new shape from the overlain circles.
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join = cascaded_union(overlapping)
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# Take the coords. of the perimeter of this new shape.
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coords = list(join.exterior.coords)
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# Store x-y coords of the perimeter in two lists to plot.
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for i in range(len(coords)):
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x.append(coords[i][0]); y.append(coords[i][1])
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shape/overlap-plot.py
