Function bezlen

libraries/p5.js:30203–30219

(x1, y1, x2, y2, x3, y3, x4, y4, z)

}

function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {
  if (z == null) { z = 1; }
  z = z > 1 ? 1 : z < 0 ? 0 : z;
  var z2 = z / 2,
    n = 12, Tvalues = [-0.1252, 0.1252, -0.3678, 0.3678, -0.5873, 0.5873,
       -0.7699, 0.7699, -0.9041, 0.9041, -0.9816, 0.9816],
    sum = 0, Cvalues = [0.2491, 0.2491, 0.2335, 0.2335, 0.2032, 0.2032,
      0.1601, 0.1601, 0.1069, 0.1069, 0.0472, 0.0472 ];
  for (var i = 0; i < n; i++) {
    var ct = z2 * Tvalues[i] + z2,
      xbase = base3(ct, x1, x2, x3, x4),
      ybase = base3(ct, y1, y2, y3, y4),
      comb = xbase * xbase + ybase * ybase;
    sum += Cvalues[i] * Math.sqrt(comb);
  }
  return z2 * sum;
}

function getTatLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {
  if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {