Basic API

To get an instance of the Pl3xMap API:

Pl3xMap api = Pl3xMapProvider.get();

To get a MapWorld from the API:

World world = Bukkit.getWorld("world");
MapWorld mapWorld = api.getWorldIfEnabled(world).orElse(null);

To create a LayerProvider:

SimpleLayerProvider provider = SimpleLayerProvider
        .builder("Layer Label")
        .showControls(true)
        .defaultHidden(false)
        .layerPriority(5);
        .zIndex(250);
        .build();

To register your LayerProvider to a MapWorld:

api.getWorldIfEnabled(world).ifPresent(mapWorld -> {
    Key key = Key.of("my_unique_layer_key");
    SimpleLayerProvider provider = SimpleLayerProvider
            .builder("My Layer")
            .showControls(true)
            .build();
    mapWorld.layerRegistry().register(key, provider);
});

To add Markers to your LayerProvider:

Key key = Key.of("my_unique_marker_key");

Point p1 = Point.of(100, 150);
Point p2 = Point.of(200, 250)

Rectangle marker = Marker.rectangle(p1, p2);

provider.addMarker(key, marker);