Function generateControlPoints

libs/mapv/mapv.3d.js:1734–1765

(radius)

};

function generateControlPoints(radius) {
    for (var f = start_flight_idx; f < end_flight_idx; ++f) {

        var start_lat = flights[f][0];
        var start_lng = flights[f][1];
        var end_lat = flights[f][2];
        var end_lng = flights[f][3];

        var max_height = Math.random() * 0.04;

        var points = [];
        var spline_control_points = 8;
        for (var i = 0; i < spline_control_points + 1; i++) {
            var arc_angle = i * 180.0 / spline_control_points;
            var arc_radius = radius + Math.sin(arc_angle * Math.PI / 180.0) * max_height;
            var latlng = latlngInterPoint(start_lat, start_lng, end_lat, end_lng, i / spline_control_points);

            var pos = xyzFromLatLng(latlng.lat, latlng.lng, arc_radius);

            points.push(new THREE.Vector3(pos.x, pos.y, pos.z));
        }

        var spline = new THREE.SplineCurve3(points);

        flight_path_splines.push(spline);

        var arc_length = spline.getLength();
        flight_distance.push(arc_length);

        setFlightTimes(f);
    }
}

function latlngInterPoint(lat1, lng1, lat2, lng2, offset) {
    lat1 = lat1 * Math.PI / 180.0;