d3.geoInterrupt()

d3.geoInterrupt(project, lobes)

Defines a new interrupted projection for the specified raw projection function project and the specified array of lobes. The array lobes contains two elements representing the hemilobes for the northern hemisphere and the southern hemisphere, respectively. Each hemilobe is an array of triangles, with each triangle represented as three points (in degrees): the start, midpoint, and end. For example, the lobes in Goode’s interrupted homolosine projection are defined as:

[
  [
    [[-180,   0], [-100,  90], [ -40,   0]],
    [[ -40,   0], [  30,  90], [ 180,   0]]
  ],
  [
    [[-180,   0], [-160, -90], [-100,   0]],
    [[-100,   0], [ -60, -90], [ -20,   0]],
    [[ -20,   0], [  20, -90], [  80,   0]],
    [[  80,   0], [ 140, -90], [ 180,   0]]
  ]
]

Note: interrupted projections typically require clipping to the sphere.