Function _default

docs/tests/v2/es6/js/sanddance.js:67623–67729

()

}

function _default() {
  var x0 = 0,
      y0 = 0,
      x1 = 1,
      y1 = 1,
      x = pointX,
      y = pointY,
      r,
      dx,
      dy;

  function hexbin(points) {
    var binsById = {},
        bins = [],
        i,
        n = points.length;

    for (i = 0; i < n; ++i) {
      if (isNaN(px = +x.call(null, point = points[i], i, points)) || isNaN(py = +y.call(null, point, i, points))) continue;
      var point,
          px,
          py,
          pj = Math.round(py = py / dy),
          pi = Math.round(px = px / dx - (pj & 1) / 2),
          py1 = py - pj;

      if (Math.abs(py1) * 3 > 1) {
        var px1 = px - pi,
            pi2 = pi + (px < pi ? -1 : 1) / 2,
            pj2 = pj + (py < pj ? -1 : 1),
            px2 = px - pi2,
            py2 = py - pj2;
        if (px1 * px1 + py1 * py1 > px2 * px2 + py2 * py2) pi = pi2 + (pj & 1 ? 1 : -1) / 2, pj = pj2;
      }

      var id = pi + "-" + pj,
          bin = binsById[id];
      if (bin) bin.push(point);else {
        bins.push(bin = binsById[id] = [point]);
        bin.x = (pi + (pj & 1) / 2) * dx;
        bin.y = pj * dy;
      }
    }

    return bins;
  }

  function hexagon(radius) {
    var x0 = 0,
        y0 = 0;
    return angles.map(function (angle) {
      var x1 = Math.sin(angle) * radius,
          y1 = -Math.cos(angle) * radius,
          dx = x1 - x0,
          dy = y1 - y0;
      x0 = x1, y0 = y1;
      return [dx, dy];
    });