如何检测点是否在圆内? [英] How to detect if a point is in a Circle?

问题描述

如何测试 LatLng 点是否在圆的边界内?(谷歌地图 JavaScript v3)

getBounds() 方法返回圆的边界框，它是一个矩形，所以如果一个点落在圆外但在边界框内，你会得到错误的答案.

解决方案

使用球面几何库

a>(务必将其包含在 API 中)

function pointInCircle(point, radius, center){返回(google.maps.geometry.sphereal.computeDistanceBetween(点，中心)<=半径)}

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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