elijahzarlin

func azimuthBetween(origin: CLLocation, destination: CLLocation) -> Float {
    var azimuth: Float = 0
    
    let originLatitude = GLKMathDegreesToRadians(Float(origin.coordinate.latitude))
    let originLongitude = GLKMathDegreesToRadians(Float(origin.coordinate.longitude))
    let destinationLatitude = GLKMathDegreesToRadians(Float(destination.coordinate.latitude))
    let destinationLongitude = GLKMathDegreesToRadians(Float(destination.coordinate.longitude))
    
    let dLon = destinationLongitude - originLongitude
    

elijahzarlin

func transformMatrix(originLocation: CLLocation, destinationLocation: CLLocation) -> simd_float4x4 {
    let azimuth = azimuthBetween(origin: originLocation, destination: destinationLocation)
    
    // Place POIs "z" meters away from camera
    let position = vector_float4(0, 0, -10, 0)
    let translationMatrix = matrix_identity_float4x4.translationMatrix(position)
    
    // Rotate POI based on azimuth
    let rotationMatrix = matrix_identity_float4x4.rotationAroundY(radians: azimuth)
    

elijahzarlin

internal extension matrix_float4x4 {
    func rotationAroundY(radians: Float) -> matrix_float4x4 {
        var matrix: matrix_float4x4 = self
        
        matrix.columns.0.x = cos(radians)
        matrix.columns.0.z = -sin(radians)
        
        matrix.columns.2.x = sin(radians)
        matrix.columns.2.z = cos(radians)
        

elijahzarlin

var locations = turf.featureCollection([
turf.point([latitude, longitude]),
turf.point([latitude, longitude])
]);
var user = turf.point([latitude, longitude]);

elijahzarlin

var nearest  = turf.nearestPoint(user, locations);
var bearing  = turf.bearingToAzimuth(turf.bearing(user, nearest));
var distance = turf.distance(user, nearest, { units: meters });
if (distance < 50) {
  // Unlock Emerald Star
}

elijahzarlin

const map = new mapboxgl.Map({
        container: "map",
        style: "mapbox://styles/mapbox/light-v9",
        center: [-122.398, 37.788],
        zoom: 12,
        pitch: 60
    });

    map.on("style.load", () => {
        // Get data for the arc map from SFMTA origin/destination routes

elijahzarlin

const errorRadiusKm = ruler.distance([item.lon, item.lat], [item.lon + errorRadiusDeg, item.lat]);
const circle = turf.circle([item.lon, item.lat], errorRadiusKm, {steps: 32, units: 'kilometers'});

elijahzarlin

let bearing = ruler.bearing(firstPoint, nextPoint);
let p1 = ruler.destination(nextPoint, errorRadius, bearing + 90);
let p2 = ruler.destination(firstPoint, acc.prevPoint.errorRadius, bearing + 90);
let p3 = ruler.destination(firstPoint, acc.prevPoint.errorRadius, bearing - 90);
let p4 = ruler.destination(nextPoint, errorRadius, bearing - 90);
const polygon = turf.polygon([[p1, p2, p3, p4, p1]]);

elijahzarlin

[
  "interpolate",
  ["linear"],
  ["get", "WindSpeed.Kph"],
  55,
  "hsl(47, 100%, 90%)",
  120,
  "hsl(340, 100%, 82%)",
  220,
  "#ff0040"

elijahzarlin

[
"interpolate",
["linear"],
["zoom"],
2,
[
"/",
[
"max",
[