geolocation + distance measurement - extjs

Question

launch: function() {
// The following is accomplished with the Google Map API
var position = new google.maps.LatLng(12.9833, 77.5833), //Sencha HQ
infowindow = new google.maps.InfoWindow({
content: 'bengaluru'
}),
//Tracking Marker Image
image = new google.maps.MarkerImage(
'resources/images/point.png',
new google.maps.Size(32, 31),
new google.maps.Point(0, 0),
new google.maps.Point(16, 31)
),
shadow = new google.maps.MarkerImage(
'resources/images/shadow.png',
new google.maps.Size(64, 52),
new google.maps.Point(0, 0),
new google.maps.Point(-5, 42)
),
trackingButton = Ext.create('Ext.Button', {
iconMask: true,
iconCls: 'locate'
}),
trafficButton = Ext.create('Ext.Button', {
iconMask: true,
pressed: true,
iconCls: 'maps'
}),
toolbar = Ext.create('Ext.Toolbar', {
docked: 'top',
ui: 'light',
defaults: {
iconMask: true
},
items: [
{
xtype:'button',
id:'calculate',
text:'calculate',
handler:function(){
alert('hello');
}
}
]
});
var mapdemo = Ext.create('Ext.Map', {
mapOptions : {
center : new google.maps.LatLng(37.381592, 122.135672), //nearby San Fran
zoom : 12,
mapTypeId : google.maps.MapTypeId.ROADMAP,
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.DEFAULT
}
},
plugins : [
new Ext.plugin.google.Tracker({
trackSuspended: true, //suspend tracking initially
allowHighAccuracy: false,
marker: new google.maps.Marker({
position: position,
title: 'My Current Location',
shadow: shadow,
icon: image
})
}),
new Ext.plugin.google.Traffic()
],
listeners: {
maprender: function(comp, map) {
var marker = new google.maps.Marker({
position: position,
title : 'Sencha HQ',
map: map
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map, marker);
});
setTimeout(function() {
map.panTo(position);
}, 1000);
}
}
});
Any ideas how can i measure distance between two destinations whose latitude and longitude are know........
this code is taken from the example provided by the sencha touch2 with little modification.
Its for sencha touch 2

Answer 1

try google.maps.geometry.spherical.computeDistanceBetween(from:LatLng, to:LatLng, radius?:number)
radius is the earth's radius = 6371000 metres (average)