OptionalanchorThe screen point that the change keeps in place. Without one, the change keeps the center of the view in place.
OptionaldecayOptionalsnapWhere the part settles. Without this, it stays where the gesture and its glide leave it.
OptionalvelocityHow fast the value changed at release: zoom levels per second for zoom, and degrees per second for bearing and pitch. The part moves only when this is set.
How a gesture's zoom, bearing, or pitch keeps changing after release.
See
mln_anchored_momentumin the C API reference.