我想在两个圆之间画一条线，并确定该线是否接触任何矩形。我的代码（如下）进行绘制，绘制线条，并且当我调用checkIntersection时，即使在视觉上肯定重叠，它也会返回false。为什么checkIntersection返回false？
var svg;
$(function() {
svg = $("#svg_map").get(0);
var destination = $("#destination");
var current_location = $("#current_location");
destination.css("fill", "green");
current_location.css("fill", "blue");
//get all ellipses
var route_points = $("ellipse");
draw_line(destination.attr("cx"), destination.attr("cy"), current_location.attr("cx"), current_location.attr("cy"));
});
function draw_line(x1, y1, x2, y2){
var container = $("#layer1")[0];
var new_line = $(document.createElementNS('http://www.w3.org/2000/svg','path')).attr({
id:"line2",
d: "M "+ x1 + ", " + y1 + "L " + x2 + ", "+y2,
stroke: "purple",
"stroke-width": 3
});
new_line.appendTo(container);
var all_shops = $("rect");
for(var i = 0; i < all_shops.length; i++){
console.log(svg.checkIntersection(new_line[0], all_shops.eq(i)[0].getBBox()));
if(svg.checkIntersection(new_line[0], all_shops.eq(i)[0].getBBox())) {
all_shops.eq(i).attr("fill", "yellow");
}
}
}rect:not(#layer1):hover{
fill: #bebebe;
opacity:0.5;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
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