diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/svg/line-radial.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/svg/line-radial.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,22 @@
+d3.svg.line.radial = function() {
+  var line = d3_svg_line(d3_svg_lineRadial);
+  line.radius = line.x, delete line.x;
+  line.angle = line.y, delete line.y;
+  return line;
+};
+
+function d3_svg_lineRadial(points) {
+  var point,
+      i = -1,
+      n = points.length,
+      r,
+      a;
+  while (++i < n) {
+    point = points[i];
+    r = point[0];
+    a = point[1] + d3_svg_arcOffset;
+    point[0] = r * Math.cos(a);
+    point[1] = r * Math.sin(a);
+  }
+  return points;
+}