i_overlay 4.5.1

Boolean Operations for 2D Polygons: Supports intersection, union, difference, xor, and self-intersections for all polygon varieties.
Documentation 
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{
  "scale": 1000.0,
  "stroke": [
    [
      [-10.0, -5.0],
      [  0.0, -5.0],
      [  0.0,  5.0],
      [ 10.0,  5.0]
    ]
  ]
}