Using Yandex map tiles in Google Maps v3 - google-maps-api-3

Question

I have Yandex map tiles (Russian) working in Google Maps API v2 but something's not working in Google Maps API v3, see the following jsfiddle: http://jsfiddle.net/VkGjq/1/
Note that when switching between the Google road map and the Yandex tiles they don't line up & the marker is in the wrong position.
For Maps v2, I made an equivalent jsfiddle but it's broken since it needs an API key: http://jsfiddle.net/ggrgQ/1/
You can see similar code here, but you will have to navigate to Moscow manually as Yandex doesn't have any decent data outside of Russia: http://gpsloglabs.com/share/2367c16f3a0e75b05ac8a5529afba225dd929518/
I don't recall where I got the v3 code, but the constants appear to roughly correspond to the v2 version. Other than that, I don't understand what the projection is doing so I'm stuck.
Any ideas?
The code from the jsfiddle is as follows:
var center = new google.maps.LatLng(55.75, 37.62);
var mapOptions = {
zoom: 10,
center: center,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map'), mapOptions);
new google.maps.Marker({map: map, position: center});
map.mapTypes.set("Yandex",
new google.maps.ImageMapType(
{getTileUrl: function(coord, zoom) {
return "http://vec0"+((coord.x+coord.y)%5)+".maps.yandex.net/tiles?l=map&v=2.16.0&x=" +
coord.x + "&y=" + coord.y + "&z=" + zoom + "";
},
tileSize: new google.maps.Size(256, 256),
isPng: true,
alt: "Yandex",
name: "Yandex",
projection: new YandexProjection(),
maxZoom: 17}));
map.setOptions({mapTypeControlOptions: {mapTypeIds: [google.maps.MapTypeId.ROADMAP, "Yandex"]} });
function YandexProjection() {
this.pixelOrigin_ = new google.maps.Point(128,128);
var MERCATOR_RANGE = 256;
this.pixelsPerLonDegree_ = MERCATOR_RANGE / 360;
this.pixelsPerLonRadian_ = MERCATOR_RANGE / (2 * Math.PI);
this.fromLatLngToPoint = function(latLng) {
function atanh(x) {
return 0.5*Math.log((1+x)/(1-x));
}
function degreesToRadians(deg) {
return deg * (Math.PI / 180);
}
function bound(value, opt_min, opt_max) {
if (opt_min != null) value = Math.max(value, opt_min);
if (opt_max != null) value = Math.min(value, opt_max);
return value;
}
var origin = this.pixelOrigin_;
var exct = 0.0818197;
var z = Math.sin(latLng.lat()/180*Math.PI);
return new google.maps.Point(origin.x + latLng.lng() *this.pixelsPerLonDegree_,
Math.abs(origin.y - this.pixelsPerLonRadian_*(atanh(z)-exct*atanh(exct*z))));
};
this.fromPointToLatLng = function(point) {
var origin = this.pixelOrigin_;
var lng = (point.x - origin.x) / this.pixelsPerLonDegree_;
var latRadians = (point.y - origin.y) / -this.pixelsPerLonRadian_;
var lat = Math.abs((2*Math.atan(Math.exp(latRadians))-Math.PI/2)*180/Math.PI);
var Zu = lat/(180/Math.PI);
var Zum1 = Zu+1;
var exct = 0.0818197;
var yy = -Math.abs(((point.y)-128));
while (Math.abs(Zum1-Zu)>0.0000001){
Zum1 = Zu;
Zu = Math.asin(1-((1+Math.sin(Zum1))*Math.pow(1-exct*Math.sin(Zum1),exct))
/ (Math.exp((2*yy)/-(256/(2*Math.PI)))*Math.pow(1+exct*Math.sin(Zum1),exct)));
}
if (point.y>256/2) {
lat=-Zu*180/Math.PI;
} else {
lat=Zu*180/Math.PI;
}
return new google.maps.LatLng(lat, lng);
};
return this;
}

Answer 1

It turns out that the projection property can't be set via the ImageMapTypeOptions and has to be assigned after the ImageMapType has been constructed, this jsfiddle now works: http://jsfiddle.net/VkGjq/2/
var yandexMapType = new google.maps.ImageMapType(
{getTileUrl: function(coord, zoom) {
return "http://vec0"+((coord.x+coord.y)%5)+".maps.yandex.net/tiles?l=map&v=2.16.0&x=" +
coord.x + "&y=" + coord.y + "&z=" + zoom + "";
},
tileSize: new google.maps.Size(256, 256),
isPng: true,
alt: "Yandex",
name: "Yandex",
maxZoom: 17});
// projection is ignored if passed to MapTypeOptions
yandexMapType.projection = new YandexProjection();
map.mapTypes.set("Yandex", yandexMapType);

Answer 2

By license agreement you can't use yandex maps without yandex api. You can't use yandex tiles in leaflet.
You need to wrap yandex api or use http://leafletjs.com/plugins.html
Or write own a wrapper.
Example https://all-maps.herokuapp.com/
https://github.com/artamonovdev/all-maps