_clipFinite()

in packages/charts/src/utils/d3-delaunay/index.ts [1074:1117]

• 44 lines of code
• 18 McCabe index (conditional complexity)

  _clipFinite(i, points) {
    const n = points.length;
    let P = null;
    let x0,
      y0,
      x1 = points[n - 2],
      y1 = points[n - 1];
    let c0,
      c1 = this._regioncode(x1, y1);
    let e0, e1;
    for (let j = 0; j < n; j += 2) {
      (x0 = x1), (y0 = y1), (x1 = points[j]), (y1 = points[j + 1]);
      (c0 = c1), (c1 = this._regioncode(x1, y1));
      if (c0 === 0 && c1 === 0) {
        (e0 = e1), (e1 = 0);
        if (P) P.push(x1, y1);
        else P = [x1, y1];
      } else {
        let S, sx0, sy0, sx1, sy1;
        if (c0 === 0) {
          if ((S = this._clipSegment(x0, y0, x1, y1, c0, c1)) === null) continue;
          [sx0, sy0, sx1, sy1] = S;
        } else {
          if ((S = this._clipSegment(x1, y1, x0, y0, c1, c0)) === null) continue;
          [sx1, sy1, sx0, sy0] = S;
          (e0 = e1), (e1 = this._edgecode(sx0, sy0));
          if (e0 && e1) this._edge(i, e0, e1, P, P.length);
          if (P) P.push(sx0, sy0);
          else P = [sx0, sy0];
        }
        (e0 = e1), (e1 = this._edgecode(sx1, sy1));
        if (e0 && e1) this._edge(i, e0, e1, P, P.length);
        if (P) P.push(sx1, sy1);
        else P = [sx1, sy1];
      }
    }
    if (P) {
      (e0 = e1), (e1 = this._edgecode(P[0], P[1]));
      if (e0 && e1) this._edge(i, e0, e1, P, P.length);
    } else if (this.contains(i, (this.xmin + this.xmax) / 2, (this.ymin + this.ymax) / 2)) {
      return [this.xmax, this.ymin, this.xmax, this.ymax, this.xmin, this.ymax, this.xmin, this.ymin];
    }
    return P;
  }