interpolateZoom

Returns an interpolator between the two views a and b of a two-dimensional plane, based on “Smooth and efficient zooming and panning”. Each view is defined as an array of three numbers: cx, cy and width. The first two coordinates cx, cy represent the center of the viewport; the last coordinate width represents the size of the viewport.

The returned interpolator exposes a duration property which encodes the recommended transition duration in milliseconds. This duration is based on the path length of the curved trajectory through x,y space. If you want to a slower or faster transition, multiply this by an arbitrary scale factor (V as described in the original paper).