{
  "version": "0.1",
  "nodes": {
    "1": { "id": 1, "name": "cube_body", "op": {"type": "Cube", "size": {"x": 40, "y": 40, "z": 40}} },
    "2": { "id": 2, "name": "cube_centered", "op": {"type": "Translate", "child": 1, "offset": {"x": -20, "y": -20, "z": 0}} },
    "3": { "id": 3, "name": "sphere", "op": {"type": "Sphere", "radius": 15, "segments": 64} },
    "4": { "id": 4, "name": "sphere_at_top", "op": {"type": "Translate", "child": 3, "offset": {"x": 0, "y": 0, "z": 40}} },
    "5": { "id": 5, "name": "half_space_cube", "op": {"type": "Cube", "size": {"x": 200, "y": 200, "z": 200}} },
    "6": { "id": 6, "name": "half_space_positioned", "op": {"type": "Translate", "child": 5, "offset": {"x": -100, "y": -100, "z": 40}} },
    "7": { "id": 7, "name": "hemisphere", "op": {"type": "Intersection", "left": 4, "right": 6} },
    "8": { "id": 8, "name": "result", "op": {"type": "Union", "left": 2, "right": 7} }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 8, "material": "default"}]
}