我想在 osm 地图中的两点之间画一条线
map = new OpenLayers.Map();
var start_point = new OpenLayers.Geometry.Point(0,10);
var end_point = new OpenLayers.Geometry.Point(30,0);
var vector = new OpenLayers.Layer.Vector();
vector.addFeatures([new OpenLayers.Feature.Vector(new OpenLayers.Geometry.LineString([start_point, end_point]))]);
map.addLayers([vector]);
我尝试了这段代码,但它没有用,所以请帮助我。