Function rescale

scripts/libs/fisheye.js:22–27

()

      }

      function rescale() {
        k0 = Math.exp(distortion);
        k0 = k0 / (k0 - 1) * radius;
        k1 = distortion / radius;
        return fisheye;
      }

      fisheye.radius = function(_) {
        if (!arguments.length) return radius;