PolylineMeasure Lines and Arrows not rendering in correct location. about leaflet.polylinemeasure HOT 3 CLOSED

Hi,
I'm afraid I can't help you with your issue. PolylineMeasure works with the latest version of Leaflet but it's just designed to work within "real world" maps. If you want to make it run also for phantasie maps you've to try to adapt the code for your world's coordinate system.

from leaflet.polylinemeasure.

Thanks for the fast response, that gives me some indication of the problem! I think Papyri handles this transformation on lines 54-78 of index.html ( https://github.com/jason-green-io/papyri/blob/master/template/index.html ) shown below.

Would you guess PolylineMeasure is most likely failing because the positive/negative quadrants of the coordinate system are arranged differently, or specifically because the world is "flat" and PolylineMeasure is trying to calculate an arc? If it's the latter case, maybe I can add an option flag for it to calculate "simple lines" without using the Great-Circle formulas.

Can you point me to the relevant portion of your code I might have to change, or at least to a starting point? I took a look at several other measuring plugins and yours is the best one I saw by far! If I can I'll adapt yours to work.

(Papyri index.html lines 54-78)

    factor = 1 / 2 ** 16
    L.CRS.pr = L.extend({}, L.CRS.Simple, {
        projection: L.Projection.LonLat,
        transformation: new L.Transformation(
            factor, 
            64 * factor, 
            factor, 
            64 * factor),
        scale: function(zoom) {
            return Math.pow(2, zoom);
        },

        zoom: function(scale) {
            return Math.log(scale) / Math.LN2;
        },

        distance: function(latlng1, latlng2) {
            var dx = latlng2.lng - latlng1.lng,
            dy = latlng2.lat - latlng1.lat;
            
            return Math.sqrt(dx * dx + dy * dy);
        },
        
        infinite: true
    });

from leaflet.polylinemeasure.

Well, the main function for drawing the arc lines is _"polylineArc" and the funtion to draw the arrows is _"drawArrow"

But since the plugin is using formulas which are restricted to the real-world coordinate system you have to create your own modified plugin to handle fictional coordinate systems. I won't implement them into PolylineMeasure, sorry. Thanks for understanding.

from leaflet.polylinemeasure.