LatLng.distanceTo not working for custom CRS

[jpuerto]

Hi all,

I'm working on a project where we defined a custom CRS, I've added the AnimatedMarker plugin and then I've realized that the distance values are completely wrong in the scale. A closer look to the plugin reveals that it's using the LatLng.distanceTo() method that in current development code is like this:

distanceTo: function (other) {
return L.CRS.Earth.distance(this, L.latLng(other));
}

I think that the LatLng object should use the defined CRS instead of hard code the most common implementation. Does anyone knows a workaround for this? ATM I have configured a fixed value to obtain an acceptable movement rate but I need to be able to define this rate programmatically so the ideal should be to use the configured map CRS implementation.

TIA and salu2.

[perliedman]

Since LatLngs have no connection to map instances, they can't know what "the defined CRS" is, so that makes it a bit hard to do this dynamically.

You can of course overwrite LatLng's prototype's distanceTo with whatever you like.

[mourner]

Yes, LatLng.distanceTo is meant as a shortcut for convenience. For non-trivial CRS uses, you should always use map.distance(latlng1, latlng2), since latlng doesn't know what CRS you use, as @perliedman mentioned.

[jpuerto]

Thanks for your replies.

I asked here because I saw the problem that @perliedman described, the LatLng object is decoupled from the map so there's no way to know the CRS at this point. As I understand, the problem then is the plugin that should use map.distance(latlng1, latlng2) method instead. I will open an issue for the plugin.