Draw line between two points using OpenLayers

Question

I have two points having lolLat as 0,10 and 30,0

Now to draw a marker at this point i use this transform while generating marker for it

lonLat.transform(
                 new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
                 map.getProjectionObject() // to Spherical Mercator Projection
             )

How can i draw line between them is there any way to do that in openlayers,i have tried doing it with linestring in vector layer but it doesn't seems to be working for me.

Answer 1

For example:

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]);

Live demo

Answer 2

In OpenLayers version 3.3, you can do this as

var points = [ [-89.8802, 32.5804], [-95.04286, 46.9235] ];

for (var i = 0; i < points.length; i++) {
    points[i] = ol.proj.transform(points[i], 'EPSG:4326', 'EPSG:3857');
}

var featureLine = new ol.Feature({
    geometry: new ol.geom.LineString(points)
});

var vectorLine = new ol.source.Vector({});
vectorLine.addFeature(featureLine);

var vectorLineLayer = new ol.layer.Vector({
    source: vectorLine,
    style: new ol.style.Style({
        fill: new ol.style.Fill({ color: '#00FF00', weight: 4 }),
        stroke: new ol.style.Stroke({ color: '#00FF00', width: 2 })
    })
});

Then add layer to map

map.addLayer(vectorLineLayer);