vue中判断用户当前位置或当前点位坐标是否在指定区域范围内

// 判断当前经纬度是否在规定区域内
function pointInPolygon(point : any, polygon : any) {
	const x = point[0];
	const y = point[1];
	let inside = false;
	for (let i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
		const xi = polygon[i][0], yi = polygon[i][1];
		const xj = polygon[j][0], yj = polygon[j][1];
		const intersect = ((yi > y) !== (yj > y)) &&
			(x < ((xj - xi) * (y - yi)) / (yj - yi) + xi);
		if (intersect) {
			inside = !inside;
		}
	}
	return inside;
}

point 代表当前的点位 [经纬度] 例如 ：[[120.6666],[30.8888]]

[polygon] 代表一个区域坐标

返回true 或 false