Getting a Polygon from a Location

Android v4
iOS v3

info

If you are looking for documentation on Android SDK v3, please see here.

Some locations in MapsIndoors can have additional polygon information. These polygons can be used to render a room or area in a special way or make geofences, calculating whether another point or location is contained within the polygon. If a MPLocation has polygons, these can be retrieved using:

val geometry: MPGeometry = location.geometry
when (geometry.iType) {
    MPGeometry.TYPE_POINT -> {
        val point = geometry
    }
    MPGeometry.TYPE_POLYGON -> {
        val polygon: MPPolygonGeometry = geometry as MPPolygonGeometry
        // Using GMS helper classes
        // Get all the paths in the polygon
        val paths: List<List<MPLatLng>> = polygon.gmsPath
        val pathCount = paths.size
        // Outer ring (first)
        val path = paths[0]
        for (coordinate in path) {
            val lat = coordinate.lat
            val lng = coordinate.lng
        }
        // Optional: Inner rings (holes)
        var i = 1
        while (i < pathCount) {
            val hole = paths[i]
            for (coordinate in hole) {
                val lat = coordinate.lat
                val lng = coordinate.lng
            }
            i++
        }
    }
}

As demonstrated above, a polygon's outer ring/path as well as holes are arranged as [longitude, latitude] pairs. As not all locations has polygons, the polygon array may be empty. On the contrary, some locations, like entire building floors, might have more than polygon.

let polygons = MPGeometryHelper.polygonsForLocation(location : MPLocation)
let polygon = polygons.first
let path = polygon.path
let holes = polygon.holes
for coordinate in path {
    let lat = coordinate[1]
    let lng = coordinate[0]
}