private void PanAndZoom()

in SupportingScripts/Runtime/Scripts/MapRenderer/Interaction/MapInteractionController.cs [283:332]
42 lines of code
11 McCabe index (conditional complexity)

        private void PanAndZoom(
            Ray ray,
            ValueTuple<MercatorCoordinate, double>? targetCoordinateAndAltitude,
            float zoomLevelSpeed,
            bool requireRayHitForZoom)
        {
            var zoomLevelDelta = ZoomLevelsPerSecond * Time.deltaTime * zoomLevelSpeed;
            if (zoomLevelDelta != 0 &&
                !(_mapRenderer.ZoomLevel >= _mapRenderer.MaximumZoomLevel && zoomLevelDelta > 0) &&
                !(_mapRenderer.ZoomLevel <= _mapRenderer.MinimumZoomLevel && zoomLevelDelta < 0))
            {
                // If we're not panning, detemrine where the ray is intersecting the map. If it's not intersecting the map,
                // no zoom will occur.
                if (!targetCoordinateAndAltitude.HasValue)
                {
                    if (_mapRenderer.Raycast(ray, out var hitInfo))
                    {
                        targetCoordinateAndAltitude = (hitInfo.Location.LatLon.ToMercatorCoordinate(), hitInfo.Location.AltitudeInMeters);
                    }
                }
            }

            if (targetCoordinateAndAltitude.HasValue)
            {
                _mapRenderer.ZoomLevel += zoomLevelDelta;

                var targetCoordinate = targetCoordinateAndAltitude.Value.Item1;
                var targetAltitude = targetCoordinateAndAltitude.Value.Item2;

                // Compute a plane that is parallel to the map's surface and passes through the target coordinate and altitude.
                var newTargetLocationInWorldSpace =
                    _mapRenderer.TransformMercatorWithAltitudeToWorldPoint(targetCoordinate, targetAltitude);
                var targetPlaneInWorldSpace = new Plane(_mapRenderer.transform.up, newTargetLocationInWorldSpace);

                // Raycast this "target plane" to determine where the ray is hitting.
                if (targetPlaneInWorldSpace.Raycast(ray, out var enter))
                {
                    var pointInWorldSpace = ray.GetPoint(enter);
                    var planeHitPointInMercatorSpace = _mapRenderer.TransformWorldPointToMercator(pointInWorldSpace);
                    var deltaInMercatorSpace = planeHitPointInMercatorSpace - targetCoordinate;
                    var recoveredCenter = _mapRenderer.Center.ToMercatorCoordinate() - deltaInMercatorSpace;
                    var newCenter = recoveredCenter.ToLatLon();
                    _mapRenderer.Center = newCenter;
                }
            }
            else if (!requireRayHitForZoom)
            {
                _mapRenderer.ZoomLevel += zoomLevelDelta;
            }
        }