Programmatic animations fail to recalculate zoom-dependent properties

[johnnewman]

Animating a region change sometimes doesn't redraw the map's streets/text for the correct level. When zoomed into Chicago and animating to the state of New York, the map initially renders like below:

After slightly pinch zooming, the map will redraw itself at the correct level:

This happens when calling setCenterCoordinate:zoomLevel:animated: with YES for animated. We've seen it on v2.1.2 and v3.0.0-pre4.

[1ec5]

This would be caused by MGLMapView issuing an update() of type Update::Render instead of Update::Zoom.

/cc @incanus @jfirebaugh

[1ec5]

Reproduces with the following code:

[self.mapView setCenterCoordinate:CLLocationCoordinate2DMake(41.87542, -87.62497) zoomLevel:18 animated:NO];

then:

[self.mapView setCenterCoordinate:CLLocationCoordinate2DMake(42.908, -75.388) zoomLevel:6 animated:YES];

[1ec5]

-setCenterCoordinate:zoomLevel:animated: uses easeTo(), which does use Update::Zoom at every step along the way, just like the pinch gesture recognizer. So I’m not sure what’s missing.