Javascript 如何使用谷歌地图 v3 检查标记是否在边界内
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3648545/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How can I check the marker is or isn't in the bounds using google maps v3
提问by zjm1126
This is my code, I think it may has some mistakes:
这是我的代码，我认为它可能有一些错误：
var bounds_array;
google.maps.event.addListener(map,'bounds_changed', function (){
var bounds_=map.getBounds();
if(bounds_){
var leftBottom=[bounds_.getSouthWest().lat(),bounds_.getSouthWest().lng()]
var rightTop=[bounds_.getNorthEast().lat(),bounds_.getNorthEast().lng()]
bounds_array=[leftBottom,rightTop];
}
});
function check_is_in_or_out(marker){
var leftBottom=bounds_array[0],rightTop=bounds_array[1];
var marker_p=[marker.getPosition().lat(),marker.getPosition().lng()];
if(marker_p[0]<leftBottom[0]||marker_p[0]>rightTop[0]||
marker_p[1]<leftBottom[1]||marker_p[1]>rightTop[1])return 0;//0 is out
else return 1;//1 is in
}
Is this code enough to check the bounds is in or out?
这段代码是否足以检查边界是进还是出？
回答by Daniel Vassallo
The LatLngBoundsobject comes with a contains()method which takes a LatLngpoint and returns true if the point happens to be within the bounds, or false if outside.
该LatLngBounds对象带有一个contains()方法，该方法接受一个LatLng点，如果该点恰好在边界内，则返回 true，如果在边界外，则返回 false。
Therefore, what about something like the following?
因此，像下面这样的事情呢？
function check_is_in_or_out(marker){
return map.getBounds().contains(marker.getPosition());
}
