d3#bisector TypeScript Examples

The following examples show how to use d3#bisector. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: LineChart.ts    From anichart.js with MIT License 6 votes vote down vote up 
private findY(area: Path2D | string, x: number) {
    const l = 0;
    const r = this.shape.height;
    // 使用中值优化，O(n^2) -> O(log(n))
    const b = bisector((d: number) => {
      return canvasHelper.isPointInPath(area, x, d);
    }).left;
    const yRange = range(l, r, 1);
    const index = b(yRange, true);
    return yRange[index];
  }