我正在使用HERE Maps SDK创建带有一组坐标的路线。为此，我使用以下代码：

var linePoints = [[String:Any]]()
self.linePoints = [["lat":37.33292,"long":-122.01026],["lat":37.33305,"long":-122.01058],["lat":37.33336,"long":-122.01104],["lat":37.33376,"long":-122.01144],["lat":37.33375,["lat":37.33372,"long":-122.01147],["lat":37.33368,"long":-122.01156],["lat":37.33367,"long":-122.01172],["lat":37.33369,"long":-122.01183],["lat":37.33385,"long":-122.01208],["lat":37.33389,"long":-122.01217],"long":-122.01227],["lat":37.33388,"long":-122.0123],["lat":37.3338,"long":-122.01232],"long":-122.01241],["lat":37.33383,"long":-122.01263],["lat":37.36421,"long":-122.06282],["lat":37.36461,"long":-122.06286],["lat":37.36526,"long":-122.06301],["lat":37.36567,"long":-122.06313],["lat":37.36632,"long":-122.06341],["lat":37.36702,"long":-122.06381],["lat":37.37243,"long":-122.06709],["lat":37.37282,"long":-122.06732],["lat":37.37314,"long":-122.06747],["lat":37.37353,"long":-122.06761],["lat":37.37396,"long":-122.06773],["lat":37.37452,"long":-122.06782],["lat":37.37628,"long":-122.06425]]
var waypoints = [nmAWaypoint]()
    var geocordinates = nmAGeoCoordinates()
    for (index,dict) in self.linePoints.enumerated() {
        geocordinates = nmAGeoCoordinates(latitude: CLLocationDegrees(dict["lat"] as! Double),longitude: CLLocationDegrees(dict["long"] as! Double))
        if (index == 0) || (index == self.linePoints.count - 1) {
            waypoints.append(nmAWaypoint(geoCoordinates: geocordinates,waypointType: 
.stopWaypoint))
        } else {
            waypoints.append(nmAWaypoint(geoCoordinates: geocordinates,waypointType: .viaWaypoint))
        }
    }

使用以下功能来计算路线：

 coreRouter.calculateRoute(withStops: waypoints,routingMode: routingMode1) { (routeResult,error)

问题：：它会在路径中创建带有很多循环（180度转弯或旋转）的路径。我为第一个和最后一个坐标传递waypointType“ .stopWaypoint”，为其余坐标传递“ .viaWaypoint”。请建议我我在做什么错。