如何检测一个点是否在Circle中？ [英] How to detect if a point is in a Circle?

问题描述

如何测试LatLng点是否在圆的范围内？ （Google Maps JavaScript v3）

getBounds（）方法返回矩形的圆的边界框，所以如果一个点落在圆的外面，您可能会收到错误的答案。

解决方案

使用球形几何图形库（一定要将其包含在API中）

  function pointInCircle（point，radius，center）
 {
 return（google.maps.geometry.spherical.computeDistanceBetween（point，center）< = radius）
} 
  

How can I test if a LatLng point is within the bounds of a circle? (Google Maps JavaScript v3)

The getBounds() method returns the bounding box for the circle, which is a rectangle, so if a point falls outside the circle but within the bounding box, you'll get the wrong answer.

解决方案

Use the spherical geometry library (be sure to include it with the API)

function pointInCircle(point, radius, center)
{
    return (google.maps.geometry.spherical.computeDistanceBetween(point, center) <= radius)
}

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