>>> import bsp_tool
>>> bsp = bsp_tool.load_bsp("tests/maps/Call of Duty 4/mp/mp_lobby.d3dbsp")
>>> bsp.brush(0).sides
[BrushSide(Plane(vec3(-1.0, 0.0, 0.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(1.0, 0.0, 0.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(0.0, -1.0, 0.0), -176.0), 'case512grey', ...),  # -Y
 BrushSide(Plane(vec3(0.0, 1.0, 0.0), 240.0), 'caulk', ...),  # +Y
 BrushSide(Plane(vec3(0.0, 0.0, -1.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(0.0, 0.0, 1.0), 192.0), 'caulk', ...)]

>>> from bsp_tool.extensions.editor.map.cod4 import MapFile as CoD4MapFile
>>> map_ = CoD4MapFile.from_file("tests/mapsrc/CoD4Radiant/Call of Duty 4/mp_lobby.map")
>>> [i for i, b in enumerate(map_.entities[0].brushes) if 240 in [abs(bs.plane.distance) for bs in b.sides]]
[0, 5]
>>> map_.entities[0].brushes[5].sides
[BrushSide(Plane(vec3(-0.0, -0.0, -1.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(-0.0, -0.0, 1.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(-0.0, -1.0, -0.0), -176.0), 'case512grey', ...),  # -Y
 BrushSide(Plane(vec3(1.0, -0.0, -0.0), 192.0), 'caulk', ...),
 BrushSide(Plane(vec3(-0.0, 1.0, -0.0), 240.0), 'caulk', ...),  # +Y
 BrushSide(Plane(vec3(-1.0, -0.0, -0.0), 192.0), 'caulk', ...)]

mins = sum((s.plane.normal * s.plane.distance for s in brush.sides if -1 in s.plane.normal), start=vec3())
maxs = sum((s.plane.normal * s.plane.distance for s in brush.sides if +1 in s.plane.normal), start=vec3())