bounding box queries over the dateline are not always returning results

When the bounding box covers bother sides of 0 (Quandrant 4 and 1 of a circle). for example index.getClusters([2, -10, -178, 10], 1) I expect it to return the points from 0 to 2 and -178 to -180.

I’ve wrote a test:

describe('group', () => {
  const createSpot = (horizonral, vertical) => {
    return {
      type: "Feature",
      geometry: {
        type: "Point",
        coordinates: [horizontal, vertical]
      }
    }
  }

  var index = supercluster({
    radius: 0.01,
    maxZoom: 1,
    extent: 512
  })

  it('should group spots near the edge', () => {
    index.load([
      createSpot(-179.989, 0),
      createSpot(-179.990, 0),
      createSpot(-179.991, 0),
      createSpot(-179.992, 0),
    ])

    const spots = index.getClusters([2, -10, -178, 10], 1)

    return expect(spots.length).toEqual(4)
  })
})

But it fails. Am I missing something? Isn’t the horizontal range -180 to 180 (vertical 90 to -90)? http://wiki.openstreetmap.org/wiki/Bounding_Box

[mourner]

I think we’ll have to split any bboxes that go over the dateline into two queries — one on the right side (up to 180), and the other on the left (starting from -180)

[mourner]

Should be fixed in #71 (thanks @mattlubner!). @Andrekra Does the PR look good to you?