Function scaleTo

d3-3.2.8/d3.js:1200–1202

(s)

      return [ l[0] * scale + translate[0], l[1] * scale + translate[1] ];
    }
    function scaleTo(s) {
      scale = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s));
    }
    function translateTo(p, l) {
      l = point(l);
      translate[0] += p[0] - l[0];