Function d3_transformCombine

explainshell/web/static/js/d3.v3.js:4671–4675

(a, b, k)

    return k;
  }
  function d3_transformCombine(a, b, k) {
    a[0] += k * b[0];
    a[1] += k * b[1];
    return a;
  }
  var d3_transformIdentity = {
    a: 1,
    b: 0,