d3-shape - npm Package Compare versions

Comparing version 1.0.2 to 1.0.3

build/d3-shape.js

@@ -1,2 +0,2 @@
-// https://d3js.org/d3-shape/ Version 1.0.2. Copyright 2016 Mike Bostock.
+// https://d3js.org/d3-shape/ Version 1.0.3. Copyright 2016 Mike Bostock.
 (function (global, factory) {
@@ -6,1811 +6,1811 @@ typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-path')) :
   (factory((global.d3 = global.d3 || {}),global.d3));
-}(this, function (exports,d3Path) { 'use strict';
+}(this, (function (exports,d3Path) { 'use strict';
 
-  function constant(x) {
-    return function constant() {
-      return x;
-    };
-  }
+function constant(x) {
+  return function constant() {
+    return x;
+  };
+}
 
-  var epsilon = 1e-12;
-  var pi = Math.PI;
-  var halfPi = pi / 2;
-  var tau = 2 * pi;
+var epsilon = 1e-12;
+var pi = Math.PI;
+var halfPi = pi / 2;
+var tau = 2 * pi;
 
-  function arcInnerRadius(d) {
-    return d.innerRadius;
-  }
+function arcInnerRadius(d) {
+  return d.innerRadius;
+}
 
-  function arcOuterRadius(d) {
-    return d.outerRadius;
-  }
+function arcOuterRadius(d) {
+  return d.outerRadius;
+}
 
-  function arcStartAngle(d) {
-    return d.startAngle;
-  }
+function arcStartAngle(d) {
+  return d.startAngle;
+}
 
-  function arcEndAngle(d) {
-    return d.endAngle;
-  }
+function arcEndAngle(d) {
+  return d.endAngle;
+}
 
-  function arcPadAngle(d) {
-    return d && d.padAngle; // Note: optional!
-  }
+function arcPadAngle(d) {
+  return d && d.padAngle; // Note: optional!
+}
 
-  function asin(x) {
-    return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
-  }
+function asin(x) {
+  return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
+}
 
-  function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
-    var x10 = x1 - x0, y10 = y1 - y0,
-        x32 = x3 - x2, y32 = y3 - y2,
-        t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
-    return [x0 + t * x10, y0 + t * y10];
-  }
+function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
+  var x10 = x1 - x0, y10 = y1 - y0,
+      x32 = x3 - x2, y32 = y3 - y2,
+      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
+  return [x0 + t * x10, y0 + t * y10];
+}
 
-  // Compute perpendicular offset line of length rc.
-  // http://mathworld.wolfram.com/Circle-LineIntersection.html
-  function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
-    var x01 = x0 - x1,
-        y01 = y0 - y1,
-        lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01),
-        ox = lo * y01,
-        oy = -lo * x01,
-        x11 = x0 + ox,
-        y11 = y0 + oy,
-        x10 = x1 + ox,
-        y10 = y1 + oy,
-        x00 = (x11 + x10) / 2,
-        y00 = (y11 + y10) / 2,
-        dx = x10 - x11,
-        dy = y10 - y11,
-        d2 = dx * dx + dy * dy,
-        r = r1 - rc,
-        D = x11 * y10 - x10 * y11,
-        d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)),
-        cx0 = (D * dy - dx * d) / d2,
-        cy0 = (-D * dx - dy * d) / d2,
-        cx1 = (D * dy + dx * d) / d2,
-        cy1 = (-D * dx + dy * d) / d2,
-        dx0 = cx0 - x00,
-        dy0 = cy0 - y00,
-        dx1 = cx1 - x00,
-        dy1 = cy1 - y00;
+// Compute perpendicular offset line of length rc.
+// http://mathworld.wolfram.com/Circle-LineIntersection.html
+function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
+  var x01 = x0 - x1,
+      y01 = y0 - y1,
+      lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01),
+      ox = lo * y01,
+      oy = -lo * x01,
+      x11 = x0 + ox,
+      y11 = y0 + oy,
+      x10 = x1 + ox,
+      y10 = y1 + oy,
+      x00 = (x11 + x10) / 2,
+      y00 = (y11 + y10) / 2,
+      dx = x10 - x11,
+      dy = y10 - y11,
+      d2 = dx * dx + dy * dy,
+      r = r1 - rc,
+      D = x11 * y10 - x10 * y11,
+      d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)),
+      cx0 = (D * dy - dx * d) / d2,
+      cy0 = (-D * dx - dy * d) / d2,
+      cx1 = (D * dy + dx * d) / d2,
+      cy1 = (-D * dx + dy * d) / d2,
+      dx0 = cx0 - x00,
+      dy0 = cy0 - y00,
+      dx1 = cx1 - x00,
+      dy1 = cy1 - y00;
 
-    // Pick the closer of the two intersection points.
-    // TODO Is there a faster way to determine which intersection to use?
-    if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
+  // Pick the closer of the two intersection points.
+  // TODO Is there a faster way to determine which intersection to use?
+  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
 
-    return {
-      cx: cx0,
-      cy: cy0,
-      x01: -ox,
-      y01: -oy,
-      x11: cx0 * (r1 / r - 1),
-      y11: cy0 * (r1 / r - 1)
-    };
-  }
+  return {
+    cx: cx0,
+    cy: cy0,
+    x01: -ox,
+    y01: -oy,
+    x11: cx0 * (r1 / r - 1),
+    y11: cy0 * (r1 / r - 1)
+  };
+}
 
+function arc() {
+  var innerRadius = arcInnerRadius,
+      outerRadius = arcOuterRadius,
+      cornerRadius = constant(0),
+      padRadius = null,
+      startAngle = arcStartAngle,
+      endAngle = arcEndAngle,
+      padAngle = arcPadAngle,
+      context = null;
+
   function arc() {
-    var innerRadius = arcInnerRadius,
-        outerRadius = arcOuterRadius,
-        cornerRadius = constant(0),
-        padRadius = null,
-        startAngle = arcStartAngle,
-        endAngle = arcEndAngle,
-        padAngle = arcPadAngle,
-        context = null;
+    var buffer,
+        r,
+        r0 = +innerRadius.apply(this, arguments),
+        r1 = +outerRadius.apply(this, arguments),
+        a0 = startAngle.apply(this, arguments) - halfPi,
+        a1 = endAngle.apply(this, arguments) - halfPi,
+        da = Math.abs(a1 - a0),
+        cw = a1 > a0;
 
-    function arc() {
-      var buffer,
-          r,
-          r0 = +innerRadius.apply(this, arguments),
-          r1 = +outerRadius.apply(this, arguments),
-          a0 = startAngle.apply(this, arguments) - halfPi,
-          a1 = endAngle.apply(this, arguments) - halfPi,
-          da = Math.abs(a1 - a0),
-          cw = a1 > a0;
+    if (!context) context = buffer = d3Path.path();
 
-      if (!context) context = buffer = d3Path.path();
+    // Ensure that the outer radius is always larger than the inner radius.
+    if (r1 < r0) r = r1, r1 = r0, r0 = r;
 
-      // Ensure that the outer radius is always larger than the inner radius.
-      if (r1 < r0) r = r1, r1 = r0, r0 = r;
+    // Is it a point?
+    if (!(r1 > epsilon)) context.moveTo(0, 0);
 
-      // Is it a point?
-      if (!(r1 > epsilon)) context.moveTo(0, 0);
-
-      // Or is it a circle or annulus?
-      else if (da > tau - epsilon) {
-        context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0));
-        context.arc(0, 0, r1, a0, a1, !cw);
-        if (r0 > epsilon) {
-          context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1));
-          context.arc(0, 0, r0, a1, a0, cw);
-        }
+    // Or is it a circle or annulus?
+    else if (da > tau - epsilon) {
+      context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0));
+      context.arc(0, 0, r1, a0, a1, !cw);
+      if (r0 > epsilon) {
+        context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1));
+        context.arc(0, 0, r0, a1, a0, cw);
       }
+    }
 
-      // Or is it a circular or annular sector?
-      else {
-        var a01 = a0,
-            a11 = a1,
-            a00 = a0,
-            a10 = a1,
-            da0 = da,
-            da1 = da,
-            ap = padAngle.apply(this, arguments) / 2,
-            rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)),
-            rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
-            rc0 = rc,
-            rc1 = rc,
-            t0,
-            t1;
+    // Or is it a circular or annular sector?
+    else {
+      var a01 = a0,
+          a11 = a1,
+          a00 = a0,
+          a10 = a1,
+          da0 = da,
+          da1 = da,
+          ap = padAngle.apply(this, arguments) / 2,
+          rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)),
+          rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
+          rc0 = rc,
+          rc1 = rc,
+          t0,
+          t1;
 
-        // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
-        if (rp > epsilon) {
-          var p0 = asin(rp / r0 * Math.sin(ap)),
-              p1 = asin(rp / r1 * Math.sin(ap));
-          if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
-          else da0 = 0, a00 = a10 = (a0 + a1) / 2;
-          if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
-          else da1 = 0, a01 = a11 = (a0 + a1) / 2;
-        }
+      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
+      if (rp > epsilon) {
+        var p0 = asin(rp / r0 * Math.sin(ap)),
+            p1 = asin(rp / r1 * Math.sin(ap));
+        if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
+        else da0 = 0, a00 = a10 = (a0 + a1) / 2;
+        if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
+        else da1 = 0, a01 = a11 = (a0 + a1) / 2;
+      }
 
-        var x01 = r1 * Math.cos(a01),
-            y01 = r1 * Math.sin(a01),
-            x10 = r0 * Math.cos(a10),
-            y10 = r0 * Math.sin(a10);
+      var x01 = r1 * Math.cos(a01),
+          y01 = r1 * Math.sin(a01),
+          x10 = r0 * Math.cos(a10),
+          y10 = r0 * Math.sin(a10);
 
-        // Apply rounded corners?
-        if (rc > epsilon) {
-          var x11 = r1 * Math.cos(a11),
-              y11 = r1 * Math.sin(a11),
-              x00 = r0 * Math.cos(a00),
-              y00 = r0 * Math.sin(a00);
+      // Apply rounded corners?
+      if (rc > epsilon) {
+        var x11 = r1 * Math.cos(a11),
+            y11 = r1 * Math.sin(a11),
+            x00 = r0 * Math.cos(a00),
+            y00 = r0 * Math.sin(a00);
 
-          // Restrict the corner radius according to the sector angle.
-          if (da < pi) {
-            var oc = da0 > epsilon ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
-                ax = x01 - oc[0],
-                ay = y01 - oc[1],
-                bx = x11 - oc[0],
-                by = y11 - oc[1],
-                kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2),
-                lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
-            rc0 = Math.min(rc, (r0 - lc) / (kc - 1));
-            rc1 = Math.min(rc, (r1 - lc) / (kc + 1));
-          }
+        // Restrict the corner radius according to the sector angle.
+        if (da < pi) {
+          var oc = da0 > epsilon ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
+              ax = x01 - oc[0],
+              ay = y01 - oc[1],
+              bx = x11 - oc[0],
+              by = y11 - oc[1],
+              kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2),
+              lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
+          rc0 = Math.min(rc, (r0 - lc) / (kc - 1));
+          rc1 = Math.min(rc, (r1 - lc) / (kc + 1));
         }
+      }
 
-        // Is the sector collapsed to a line?
-        if (!(da1 > epsilon)) context.moveTo(x01, y01);
+      // Is the sector collapsed to a line?
+      if (!(da1 > epsilon)) context.moveTo(x01, y01);
 
-        // Does the sector’s outer ring have rounded corners?
-        else if (rc1 > epsilon) {
-          t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
-          t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
+      // Does the sector’s outer ring have rounded corners?
+      else if (rc1 > epsilon) {
+        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
+        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
 
-          context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
+        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
 
-          // Have the corners merged?
-          if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);
+        // Have the corners merged?
+        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);
 
-          // Otherwise, draw the two corners and the ring.
-          else {
-            context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
-            context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
-            context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
-          }
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
+          context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
         }
+      }
 
-        // Or is the outer ring just a circular arc?
-        else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
+      // Or is the outer ring just a circular arc?
+      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
 
-        // Is there no inner ring, and it’s a circular sector?
-        // Or perhaps it’s an annular sector collapsed due to padding?
-        if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);
+      // Is there no inner ring, and it’s a circular sector?
+      // Or perhaps it’s an annular sector collapsed due to padding?
+      if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);
 
-        // Does the sector’s inner ring (or point) have rounded corners?
-        else if (rc0 > epsilon) {
-          t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
-          t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
+      // Does the sector’s inner ring (or point) have rounded corners?
+      else if (rc0 > epsilon) {
+        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
+        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
 
-          context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
+        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
 
-          // Have the corners merged?
-          if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);
+        // Have the corners merged?
+        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);
 
-          // Otherwise, draw the two corners and the ring.
-          else {
-            context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
-            context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
-            context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
-          }
+        // Otherwise, draw the two corners and the ring.
+        else {
+          context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);
+          context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
+          context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);
         }
-
-        // Or is the inner ring just a circular arc?
-        else context.arc(0, 0, r0, a10, a00, cw);
       }
 
-      context.closePath();
-
-      if (buffer) return context = null, buffer + "" || null;
+      // Or is the inner ring just a circular arc?
+      else context.arc(0, 0, r0, a10, a00, cw);
     }
 
-    arc.centroid = function() {
-      var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
-          a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;
-      return [Math.cos(a) * r, Math.sin(a) * r];
-    };
+    context.closePath();
 
-    arc.innerRadius = function(_) {
-      return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant(+_), arc) : innerRadius;
-    };
+    if (buffer) return context = null, buffer + "" || null;
+  }
 
-    arc.outerRadius = function(_) {
-      return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant(+_), arc) : outerRadius;
-    };
+  arc.centroid = function() {
+    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
+        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;
+    return [Math.cos(a) * r, Math.sin(a) * r];
+  };
 
-    arc.cornerRadius = function(_) {
-      return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant(+_), arc) : cornerRadius;
-    };
+  arc.innerRadius = function(_) {
+    return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant(+_), arc) : innerRadius;
+  };
 
-    arc.padRadius = function(_) {
-      return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant(+_), arc) : padRadius;
-    };
+  arc.outerRadius = function(_) {
+    return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant(+_), arc) : outerRadius;
+  };
 
-    arc.startAngle = function(_) {
-      return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), arc) : startAngle;
-    };
+  arc.cornerRadius = function(_) {
+    return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant(+_), arc) : cornerRadius;
+  };
 
-    arc.endAngle = function(_) {
-      return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), arc) : endAngle;
-    };
+  arc.padRadius = function(_) {
+    return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant(+_), arc) : padRadius;
+  };
 
-    arc.padAngle = function(_) {
-      return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), arc) : padAngle;
-    };
+  arc.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), arc) : startAngle;
+  };
 
-    arc.context = function(_) {
-      return arguments.length ? ((context = _ == null ? null : _), arc) : context;
-    };
+  arc.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), arc) : endAngle;
+  };
 
-    return arc;
-  }
+  arc.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), arc) : padAngle;
+  };
 
-  function Linear(context) {
-    this._context = context;
-  }
-
-  Linear.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; // proceed
-        default: this._context.lineTo(x, y); break;
-      }
-    }
+  arc.context = function(_) {
+    return arguments.length ? ((context = _ == null ? null : _), arc) : context;
   };
 
-  function curveLinear(context) {
-    return new Linear(context);
-  }
+  return arc;
+}
 
-  function x(p) {
-    return p[0];
-  }
+function Linear(context) {
+  this._context = context;
+}
 
-  function y(p) {
-    return p[1];
+Linear.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: this._context.lineTo(x, y); break;
+    }
   }
+};
 
-  function line() {
-    var x$$ = x,
-        y$$ = y,
-        defined = constant(true),
-        context = null,
-        curve = curveLinear,
-        output = null;
+function curveLinear(context) {
+  return new Linear(context);
+}
 
-    function line(data) {
-      var i,
-          n = data.length,
-          d,
-          defined0 = false,
-          buffer;
+function x(p) {
+  return p[0];
+}
 
-      if (context == null) output = curve(buffer = d3Path.path());
+function y(p) {
+  return p[1];
+}
 
-      for (i = 0; i <= n; ++i) {
-        if (!(i < n && defined(d = data[i], i, data)) === defined0) {
-          if (defined0 = !defined0) output.lineStart();
-          else output.lineEnd();
-        }
-        if (defined0) output.point(+x$$(d, i, data), +y$$(d, i, data));
+function line() {
+  var x$$ = x,
+      y$$ = y,
+      defined = constant(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
+
+  function line(data) {
+    var i,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer;
+
+    if (context == null) output = curve(buffer = d3Path.path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) output.lineStart();
+        else output.lineEnd();
       }
-
-      if (buffer) return output = null, buffer + "" || null;
+      if (defined0) output.point(+x$$(d, i, data), +y$$(d, i, data));
     }
 
-    line.x = function(_) {
-      return arguments.length ? (x$$ = typeof _ === "function" ? _ : constant(+_), line) : x$$;
-    };
+    if (buffer) return output = null, buffer + "" || null;
+  }
 
-    line.y = function(_) {
-      return arguments.length ? (y$$ = typeof _ === "function" ? _ : constant(+_), line) : y$$;
-    };
+  line.x = function(_) {
+    return arguments.length ? (x$$ = typeof _ === "function" ? _ : constant(+_), line) : x$$;
+  };
 
-    line.defined = function(_) {
-      return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), line) : defined;
-    };
+  line.y = function(_) {
+    return arguments.length ? (y$$ = typeof _ === "function" ? _ : constant(+_), line) : y$$;
+  };
 
-    line.curve = function(_) {
-      return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
-    };
+  line.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), line) : defined;
+  };
 
-    line.context = function(_) {
-      return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
-    };
+  line.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
+  };
 
-    return line;
-  }
+  line.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
+  };
 
-  function area() {
-    var x0 = x,
-        x1 = null,
-        y0 = constant(0),
-        y1 = y,
-        defined = constant(true),
-        context = null,
-        curve = curveLinear,
-        output = null;
+  return line;
+}
 
-    function area(data) {
-      var i,
-          j,
-          k,
-          n = data.length,
-          d,
-          defined0 = false,
-          buffer,
-          x0z = new Array(n),
-          y0z = new Array(n);
+function area() {
+  var x0 = x,
+      x1 = null,
+      y0 = constant(0),
+      y1 = y,
+      defined = constant(true),
+      context = null,
+      curve = curveLinear,
+      output = null;
 
-      if (context == null) output = curve(buffer = d3Path.path());
+  function area(data) {
+    var i,
+        j,
+        k,
+        n = data.length,
+        d,
+        defined0 = false,
+        buffer,
+        x0z = new Array(n),
+        y0z = new Array(n);
 
-      for (i = 0; i <= n; ++i) {
-        if (!(i < n && defined(d = data[i], i, data)) === defined0) {
-          if (defined0 = !defined0) {
-            j = i;
-            output.areaStart();
-            output.lineStart();
-          } else {
-            output.lineEnd();
-            output.lineStart();
-            for (k = i - 1; k >= j; --k) {
-              output.point(x0z[k], y0z[k]);
-            }
-            output.lineEnd();
-            output.areaEnd();
+    if (context == null) output = curve(buffer = d3Path.path());
+
+    for (i = 0; i <= n; ++i) {
+      if (!(i < n && defined(d = data[i], i, data)) === defined0) {
+        if (defined0 = !defined0) {
+          j = i;
+          output.areaStart();
+          output.lineStart();
+        } else {
+          output.lineEnd();
+          output.lineStart();
+          for (k = i - 1; k >= j; --k) {
+            output.point(x0z[k], y0z[k]);
           }
+          output.lineEnd();
+          output.areaEnd();
         }
-        if (defined0) {
-          x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
-          output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
-        }
       }
-
-      if (buffer) return output = null, buffer + "" || null;
+      if (defined0) {
+        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
+        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
+      }
     }
 
-    function arealine() {
-      return line().defined(defined).curve(curve).context(context);
-    }
+    if (buffer) return output = null, buffer + "" || null;
+  }
 
-    area.x = function(_) {
-      return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), x1 = null, area) : x0;
-    };
+  function arealine() {
+    return line().defined(defined).curve(curve).context(context);
+  }
 
-    area.x0 = function(_) {
-      return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), area) : x0;
-    };
+  area.x = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), x1 = null, area) : x0;
+  };
 
-    area.x1 = function(_) {
-      return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : x1;
-    };
+  area.x0 = function(_) {
+    return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), area) : x0;
+  };
 
-    area.y = function(_) {
-      return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), y1 = null, area) : y0;
-    };
+  area.x1 = function(_) {
+    return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : x1;
+  };
 
-    area.y0 = function(_) {
-      return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), area) : y0;
-    };
+  area.y = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), y1 = null, area) : y0;
+  };
 
-    area.y1 = function(_) {
-      return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : y1;
-    };
+  area.y0 = function(_) {
+    return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), area) : y0;
+  };
 
-    area.lineX0 =
-    area.lineY0 = function() {
-      return arealine().x(x0).y(y0);
-    };
+  area.y1 = function(_) {
+    return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : y1;
+  };
 
-    area.lineY1 = function() {
-      return arealine().x(x0).y(y1);
-    };
+  area.lineX0 =
+  area.lineY0 = function() {
+    return arealine().x(x0).y(y0);
+  };
 
-    area.lineX1 = function() {
-      return arealine().x(x1).y(y0);
-    };
+  area.lineY1 = function() {
+    return arealine().x(x0).y(y1);
+  };
 
-    area.defined = function(_) {
-      return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), area) : defined;
-    };
+  area.lineX1 = function() {
+    return arealine().x(x1).y(y0);
+  };
 
-    area.curve = function(_) {
-      return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
-    };
+  area.defined = function(_) {
+    return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), area) : defined;
+  };
 
-    area.context = function(_) {
-      return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
-    };
+  area.curve = function(_) {
+    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
+  };
 
-    return area;
-  }
+  area.context = function(_) {
+    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
+  };
 
-  function descending(a, b) {
-    return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-  }
+  return area;
+}
 
-  function identity(d) {
-    return d;
-  }
+function descending(a, b) {
+  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+}
 
-  function pie() {
-    var value = identity,
-        sortValues = descending,
-        sort = null,
-        startAngle = constant(0),
-        endAngle = constant(tau),
-        padAngle = constant(0);
+function identity(d) {
+  return d;
+}
 
-    function pie(data) {
-      var i,
-          n = data.length,
-          j,
-          k,
-          sum = 0,
-          index = new Array(n),
-          arcs = new Array(n),
-          a0 = +startAngle.apply(this, arguments),
-          da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),
-          a1,
-          p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
-          pa = p * (da < 0 ? -1 : 1),
-          v;
+function pie() {
+  var value = identity,
+      sortValues = descending,
+      sort = null,
+      startAngle = constant(0),
+      endAngle = constant(tau),
+      padAngle = constant(0);
 
-      for (i = 0; i < n; ++i) {
-        if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
-          sum += v;
-        }
+  function pie(data) {
+    var i,
+        n = data.length,
+        j,
+        k,
+        sum = 0,
+        index = new Array(n),
+        arcs = new Array(n),
+        a0 = +startAngle.apply(this, arguments),
+        da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),
+        a1,
+        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
+        pa = p * (da < 0 ? -1 : 1),
+        v;
+
+    for (i = 0; i < n; ++i) {
+      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
+        sum += v;
       }
+    }
 
-      // Optionally sort the arcs by previously-computed values or by data.
-      if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
-      else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
+    // Optionally sort the arcs by previously-computed values or by data.
+    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
+    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
 
-      // Compute the arcs! They are stored in the original data's order.
-      for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
-        j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
-          data: data[j],
-          index: i,
-          value: v,
-          startAngle: a0,
-          endAngle: a1,
-          padAngle: p
-        };
-      }
-
-      return arcs;
+    // Compute the arcs! They are stored in the original data's order.
+    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
+      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
+        data: data[j],
+        index: i,
+        value: v,
+        startAngle: a0,
+        endAngle: a1,
+        padAngle: p
+      };
     }
 
-    pie.value = function(_) {
-      return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), pie) : value;
-    };
+    return arcs;
+  }
 
-    pie.sortValues = function(_) {
-      return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
-    };
+  pie.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), pie) : value;
+  };
 
-    pie.sort = function(_) {
-      return arguments.length ? (sort = _, sortValues = null, pie) : sort;
-    };
+  pie.sortValues = function(_) {
+    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
+  };
 
-    pie.startAngle = function(_) {
-      return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), pie) : startAngle;
-    };
+  pie.sort = function(_) {
+    return arguments.length ? (sort = _, sortValues = null, pie) : sort;
+  };
 
-    pie.endAngle = function(_) {
-      return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), pie) : endAngle;
-    };
+  pie.startAngle = function(_) {
+    return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), pie) : startAngle;
+  };
 
-    pie.padAngle = function(_) {
-      return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), pie) : padAngle;
-    };
+  pie.endAngle = function(_) {
+    return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), pie) : endAngle;
+  };
 
-    return pie;
+  pie.padAngle = function(_) {
+    return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), pie) : padAngle;
+  };
+
+  return pie;
+}
+
+var curveRadialLinear = curveRadial(curveLinear);
+
+function Radial(curve) {
+  this._curve = curve;
+}
+
+Radial.prototype = {
+  areaStart: function() {
+    this._curve.areaStart();
+  },
+  areaEnd: function() {
+    this._curve.areaEnd();
+  },
+  lineStart: function() {
+    this._curve.lineStart();
+  },
+  lineEnd: function() {
+    this._curve.lineEnd();
+  },
+  point: function(a, r) {
+    this._curve.point(r * Math.sin(a), r * -Math.cos(a));
   }
+};
 
-  var curveRadialLinear = curveRadial(curveLinear);
+function curveRadial(curve) {
 
-  function Radial(curve) {
-    this._curve = curve;
+  function radial(context) {
+    return new Radial(curve(context));
   }
 
-  Radial.prototype = {
-    areaStart: function() {
-      this._curve.areaStart();
-    },
-    areaEnd: function() {
-      this._curve.areaEnd();
-    },
-    lineStart: function() {
-      this._curve.lineStart();
-    },
-    lineEnd: function() {
-      this._curve.lineEnd();
-    },
-    point: function(a, r) {
-      this._curve.point(r * Math.sin(a), r * -Math.cos(a));
-    }
+  radial._curve = curve;
+
+  return radial;
+}
+
+function radialLine(l) {
+  var c = l.curve;
+
+  l.angle = l.x, delete l.x;
+  l.radius = l.y, delete l.y;
+
+  l.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
   };
 
-  function curveRadial(curve) {
+  return l;
+}
 
-    function radial(context) {
-      return new Radial(curve(context));
-    }
+function radialLine$1() {
+  return radialLine(line().curve(curveRadialLinear));
+}
 
-    radial._curve = curve;
+function radialArea() {
+  var a = area().curve(curveRadialLinear),
+      c = a.curve,
+      x0 = a.lineX0,
+      x1 = a.lineX1,
+      y0 = a.lineY0,
+      y1 = a.lineY1;
 
-    return radial;
-  }
+  a.angle = a.x, delete a.x;
+  a.startAngle = a.x0, delete a.x0;
+  a.endAngle = a.x1, delete a.x1;
+  a.radius = a.y, delete a.y;
+  a.innerRadius = a.y0, delete a.y0;
+  a.outerRadius = a.y1, delete a.y1;
+  a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;
+  a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;
+  a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;
+  a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;
 
-  function radialLine(l) {
-    var c = l.curve;
+  a.curve = function(_) {
+    return arguments.length ? c(curveRadial(_)) : c()._curve;
+  };
 
-    l.angle = l.x, delete l.x;
-    l.radius = l.y, delete l.y;
+  return a;
+}
 
-    l.curve = function(_) {
-      return arguments.length ? c(curveRadial(_)) : c()._curve;
-    };
+var circle = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / pi);
+    context.moveTo(r, 0);
+    context.arc(0, 0, r, 0, tau);
+  }
+};
 
-    return l;
+var cross = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / 5) / 2;
+    context.moveTo(-3 * r, -r);
+    context.lineTo(-r, -r);
+    context.lineTo(-r, -3 * r);
+    context.lineTo(r, -3 * r);
+    context.lineTo(r, -r);
+    context.lineTo(3 * r, -r);
+    context.lineTo(3 * r, r);
+    context.lineTo(r, r);
+    context.lineTo(r, 3 * r);
+    context.lineTo(-r, 3 * r);
+    context.lineTo(-r, r);
+    context.lineTo(-3 * r, r);
+    context.closePath();
   }
+};
 
-  function radialLine$1() {
-    return radialLine(line().curve(curveRadialLinear));
+var tan30 = Math.sqrt(1 / 3);
+var tan30_2 = tan30 * 2;
+var diamond = {
+  draw: function(context, size) {
+    var y = Math.sqrt(size / tan30_2),
+        x = y * tan30;
+    context.moveTo(0, -y);
+    context.lineTo(x, 0);
+    context.lineTo(0, y);
+    context.lineTo(-x, 0);
+    context.closePath();
   }
+};
 
-  function radialArea() {
-    var a = area().curve(curveRadialLinear),
-        c = a.curve,
-        x0 = a.lineX0,
-        x1 = a.lineX1,
-        y0 = a.lineY0,
-        y1 = a.lineY1;
+var ka = 0.89081309152928522810;
+var kr = Math.sin(pi / 10) / Math.sin(7 * pi / 10);
+var kx = Math.sin(tau / 10) * kr;
+var ky = -Math.cos(tau / 10) * kr;
+var star = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size * ka),
+        x = kx * r,
+        y = ky * r;
+    context.moveTo(0, -r);
+    context.lineTo(x, y);
+    for (var i = 1; i < 5; ++i) {
+      var a = tau * i / 5,
+          c = Math.cos(a),
+          s = Math.sin(a);
+      context.lineTo(s * r, -c * r);
+      context.lineTo(c * x - s * y, s * x + c * y);
+    }
+    context.closePath();
+  }
+};
 
-    a.angle = a.x, delete a.x;
-    a.startAngle = a.x0, delete a.x0;
-    a.endAngle = a.x1, delete a.x1;
-    a.radius = a.y, delete a.y;
-    a.innerRadius = a.y0, delete a.y0;
-    a.outerRadius = a.y1, delete a.y1;
-    a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;
-    a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;
-    a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;
-    a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;
+var square = {
+  draw: function(context, size) {
+    var w = Math.sqrt(size),
+        x = -w / 2;
+    context.rect(x, x, w, w);
+  }
+};
 
-    a.curve = function(_) {
-      return arguments.length ? c(curveRadial(_)) : c()._curve;
-    };
+var sqrt3 = Math.sqrt(3);
 
-    return a;
+var triangle = {
+  draw: function(context, size) {
+    var y = -Math.sqrt(size / (sqrt3 * 3));
+    context.moveTo(0, y * 2);
+    context.lineTo(-sqrt3 * y, -y);
+    context.lineTo(sqrt3 * y, -y);
+    context.closePath();
   }
+};
 
-  var circle = {
-    draw: function(context, size) {
-      var r = Math.sqrt(size / pi);
-      context.moveTo(r, 0);
-      context.arc(0, 0, r, 0, tau);
-    }
-  };
+var c = -0.5;
+var s = Math.sqrt(3) / 2;
+var k = 1 / Math.sqrt(12);
+var a = (k / 2 + 1) * 3;
+var wye = {
+  draw: function(context, size) {
+    var r = Math.sqrt(size / a),
+        x0 = r / 2,
+        y0 = r * k,
+        x1 = x0,
+        y1 = r * k + r,
+        x2 = -x1,
+        y2 = y1;
+    context.moveTo(x0, y0);
+    context.lineTo(x1, y1);
+    context.lineTo(x2, y2);
+    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
+    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
+    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
+    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
+    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
+    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
+    context.closePath();
+  }
+};
 
-  var cross = {
-    draw: function(context, size) {
-      var r = Math.sqrt(size / 5) / 2;
-      context.moveTo(-3 * r, -r);
-      context.lineTo(-r, -r);
-      context.lineTo(-r, -3 * r);
-      context.lineTo(r, -3 * r);
-      context.lineTo(r, -r);
-      context.lineTo(3 * r, -r);
-      context.lineTo(3 * r, r);
-      context.lineTo(r, r);
-      context.lineTo(r, 3 * r);
-      context.lineTo(-r, 3 * r);
-      context.lineTo(-r, r);
-      context.lineTo(-3 * r, r);
-      context.closePath();
-    }
-  };
+var symbols = [
+  circle,
+  cross,
+  diamond,
+  square,
+  star,
+  triangle,
+  wye
+];
 
-  var tan30 = Math.sqrt(1 / 3);
-  var tan30_2 = tan30 * 2;
-  var diamond = {
-    draw: function(context, size) {
-      var y = Math.sqrt(size / tan30_2),
-          x = y * tan30;
-      context.moveTo(0, -y);
-      context.lineTo(x, 0);
-      context.lineTo(0, y);
-      context.lineTo(-x, 0);
-      context.closePath();
-    }
-  };
+function symbol() {
+  var type = constant(circle),
+      size = constant(64),
+      context = null;
 
-  var ka = 0.89081309152928522810;
-  var kr = Math.sin(pi / 10) / Math.sin(7 * pi / 10);
-  var kx = Math.sin(tau / 10) * kr;
-  var ky = -Math.cos(tau / 10) * kr;
-  var star = {
-    draw: function(context, size) {
-      var r = Math.sqrt(size * ka),
-          x = kx * r,
-          y = ky * r;
-      context.moveTo(0, -r);
-      context.lineTo(x, y);
-      for (var i = 1; i < 5; ++i) {
-        var a = tau * i / 5,
-            c = Math.cos(a),
-            s = Math.sin(a);
-        context.lineTo(s * r, -c * r);
-        context.lineTo(c * x - s * y, s * x + c * y);
-      }
-      context.closePath();
-    }
-  };
+  function symbol() {
+    var buffer;
+    if (!context) context = buffer = d3Path.path();
+    type.apply(this, arguments).draw(context, +size.apply(this, arguments));
+    if (buffer) return context = null, buffer + "" || null;
+  }
 
-  var square = {
-    draw: function(context, size) {
-      var w = Math.sqrt(size),
-          x = -w / 2;
-      context.rect(x, x, w, w);
-    }
+  symbol.type = function(_) {
+    return arguments.length ? (type = typeof _ === "function" ? _ : constant(_), symbol) : type;
   };
 
-  var sqrt3 = Math.sqrt(3);
-
-  var triangle = {
-    draw: function(context, size) {
-      var y = -Math.sqrt(size / (sqrt3 * 3));
-      context.moveTo(0, y * 2);
-      context.lineTo(-sqrt3 * y, -y);
-      context.lineTo(sqrt3 * y, -y);
-      context.closePath();
-    }
+  symbol.size = function(_) {
+    return arguments.length ? (size = typeof _ === "function" ? _ : constant(+_), symbol) : size;
   };
 
-  var c = -0.5;
-  var s = Math.sqrt(3) / 2;
-  var k = 1 / Math.sqrt(12);
-  var a = (k / 2 + 1) * 3;
-  var wye = {
-    draw: function(context, size) {
-      var r = Math.sqrt(size / a),
-          x0 = r / 2,
-          y0 = r * k,
-          x1 = x0,
-          y1 = r * k + r,
-          x2 = -x1,
-          y2 = y1;
-      context.moveTo(x0, y0);
-      context.lineTo(x1, y1);
-      context.lineTo(x2, y2);
-      context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
-      context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
-      context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
-      context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
-      context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
-      context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
-      context.closePath();
-    }
+  symbol.context = function(_) {
+    return arguments.length ? (context = _ == null ? null : _, symbol) : context;
   };
 
-  var symbols = [
-    circle,
-    cross,
-    diamond,
-    square,
-    star,
-    triangle,
-    wye
-  ];
+  return symbol;
+}
 
-  function symbol() {
-    var type = constant(circle),
-        size = constant(64),
-        context = null;
+function noop() {}
 
-    function symbol() {
-      var buffer;
-      if (!context) context = buffer = d3Path.path();
-      type.apply(this, arguments).draw(context, +size.apply(this, arguments));
-      if (buffer) return context = null, buffer + "" || null;
-    }
+function point(that, x, y) {
+  that._context.bezierCurveTo(
+    (2 * that._x0 + that._x1) / 3,
+    (2 * that._y0 + that._y1) / 3,
+    (that._x0 + 2 * that._x1) / 3,
+    (that._y0 + 2 * that._y1) / 3,
+    (that._x0 + 4 * that._x1 + x) / 6,
+    (that._y0 + 4 * that._y1 + y) / 6
+  );
+}
 
-    symbol.type = function(_) {
-      return arguments.length ? (type = typeof _ === "function" ? _ : constant(_), symbol) : type;
-    };
+function Basis(context) {
+  this._context = context;
+}
 
-    symbol.size = function(_) {
-      return arguments.length ? (size = typeof _ === "function" ? _ : constant(+_), symbol) : size;
-    };
-
-    symbol.context = function(_) {
-      return arguments.length ? (context = _ == null ? null : _, symbol) : context;
-    };
-
-    return symbol;
+Basis.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 3: point(this, this._x1, this._y1); // proceed
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
+      default: point(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
   }
+};
 
-  function noop() {}
+function basis(context) {
+  return new Basis(context);
+}
 
-  function point(that, x, y) {
-    that._context.bezierCurveTo(
-      (2 * that._x0 + that._x1) / 3,
-      (2 * that._y0 + that._y1) / 3,
-      (that._x0 + 2 * that._x1) / 3,
-      (that._y0 + 2 * that._y1) / 3,
-      (that._x0 + 4 * that._x1 + x) / 6,
-      (that._y0 + 4 * that._y1 + y) / 6
-    );
-  }
+function BasisClosed(context) {
+  this._context = context;
+}
 
-  function Basis(context) {
-    this._context = context;
-  }
-
-  Basis.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 =
-      this._y0 = this._y1 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 3: point(this, this._x1, this._y1); // proceed
-        case 2: this._context.lineTo(this._x1, this._y1); break;
+BasisClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x2, this._y2);
+        this._context.closePath();
+        break;
       }
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
-        default: point(this, x, y); break;
+      case 2: {
+        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
+        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
+        this._context.closePath();
+        break;
       }
-      this._x0 = this._x1, this._x1 = x;
-      this._y0 = this._y1, this._y1 = y;
+      case 3: {
+        this.point(this._x2, this._y2);
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        break;
+      }
     }
-  };
-
-  function basis(context) {
-    return new Basis(context);
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
+      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
+      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
+      default: point(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
   }
+};
 
-  function BasisClosed(context) {
-    this._context = context;
-  }
+function basisClosed(context) {
+  return new BasisClosed(context);
+}
 
-  BasisClosed.prototype = {
-    areaStart: noop,
-    areaEnd: noop,
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
-      this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 1: {
-          this._context.moveTo(this._x2, this._y2);
-          this._context.closePath();
-          break;
-        }
-        case 2: {
-          this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
-          this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
-          this._context.closePath();
-          break;
-        }
-        case 3: {
-          this.point(this._x2, this._y2);
-          this.point(this._x3, this._y3);
-          this.point(this._x4, this._y4);
-          break;
-        }
-      }
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
-        case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
-        case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
-        default: point(this, x, y); break;
-      }
-      this._x0 = this._x1, this._x1 = x;
-      this._y0 = this._y1, this._y1 = y;
+function BasisOpen(context) {
+  this._context = context;
+}
+
+BasisOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
+      case 3: this._point = 4; // proceed
+      default: point(this, x, y); break;
     }
-  };
-
-  function basisClosed(context) {
-    return new BasisClosed(context);
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
   }
+};
 
-  function BasisOpen(context) {
-    this._context = context;
-  }
+function basisOpen(context) {
+  return new BasisOpen(context);
+}
 
-  BasisOpen.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 =
-      this._y0 = this._y1 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
-        case 3: this._point = 4; // proceed
-        default: point(this, x, y); break;
+function Bundle(context, beta) {
+  this._basis = new Basis(context);
+  this._beta = beta;
+}
+
+Bundle.prototype = {
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+    this._basis.lineStart();
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        j = x.length - 1;
+
+    if (j > 0) {
+      var x0 = x[0],
+          y0 = y[0],
+          dx = x[j] - x0,
+          dy = y[j] - y0,
+          i = -1,
+          t;
+
+      while (++i <= j) {
+        t = i / j;
+        this._basis.point(
+          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
+          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
+        );
       }
-      this._x0 = this._x1, this._x1 = x;
-      this._y0 = this._y1, this._y1 = y;
     }
-  };
 
-  function basisOpen(context) {
-    return new BasisOpen(context);
+    this._x = this._y = null;
+    this._basis.lineEnd();
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
   }
+};
 
-  function Bundle(context, beta) {
-    this._basis = new Basis(context);
-    this._beta = beta;
+var bundle = (function custom(beta) {
+
+  function bundle(context) {
+    return beta === 1 ? new Basis(context) : new Bundle(context, beta);
   }
 
-  Bundle.prototype = {
-    lineStart: function() {
-      this._x = [];
-      this._y = [];
-      this._basis.lineStart();
-    },
-    lineEnd: function() {
-      var x = this._x,
-          y = this._y,
-          j = x.length - 1;
+  bundle.beta = function(beta) {
+    return custom(+beta);
+  };
 
-      if (j > 0) {
-        var x0 = x[0],
-            y0 = y[0],
-            dx = x[j] - x0,
-            dy = y[j] - y0,
-            i = -1,
-            t;
+  return bundle;
+})(0.85);
 
-        while (++i <= j) {
-          t = i / j;
-          this._basis.point(
-            this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
-            this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
-          );
-        }
-      }
+function point$1(that, x, y) {
+  that._context.bezierCurveTo(
+    that._x1 + that._k * (that._x2 - that._x0),
+    that._y1 + that._k * (that._y2 - that._y0),
+    that._x2 + that._k * (that._x1 - x),
+    that._y2 + that._k * (that._y1 - y),
+    that._x2,
+    that._y2
+  );
+}
 
-      this._x = this._y = null;
-      this._basis.lineEnd();
-    },
-    point: function(x, y) {
-      this._x.push(+x);
-      this._y.push(+y);
-    }
-  };
+function Cardinal(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
 
-  var bundle = (function custom(beta) {
-
-    function bundle(context) {
-      return beta === 1 ? new Basis(context) : new Bundle(context, beta);
+Cardinal.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: point$1(this, this._x1, this._y1); break;
     }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
+      case 2: this._point = 3; // proceed
+      default: point$1(this, x, y); break;
+    }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    bundle.beta = function(beta) {
-      return custom(+beta);
-    };
+var cardinal = (function custom(tension) {
 
-    return bundle;
-  })(0.85);
-
-  function point$1(that, x, y) {
-    that._context.bezierCurveTo(
-      that._x1 + that._k * (that._x2 - that._x0),
-      that._y1 + that._k * (that._y2 - that._y0),
-      that._x2 + that._k * (that._x1 - x),
-      that._y2 + that._k * (that._y1 - y),
-      that._x2,
-      that._y2
-    );
+  function cardinal(context) {
+    return new Cardinal(context, tension);
   }
 
-  function Cardinal(context, tension) {
-    this._context = context;
-    this._k = (1 - tension) / 6;
-  }
-
-  Cardinal.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 =
-      this._y0 = this._y1 = this._y2 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 2: this._context.lineTo(this._x2, this._y2); break;
-        case 3: point$1(this, this._x1, this._y1); break;
-      }
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
-        case 2: this._point = 3; // proceed
-        default: point$1(this, x, y); break;
-      }
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
-    }
+  cardinal.tension = function(tension) {
+    return custom(+tension);
   };
 
-  var cardinal = (function custom(tension) {
+  return cardinal;
+})(0);
 
-    function cardinal(context) {
-      return new Cardinal(context, tension);
-    }
+function CardinalClosed(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
 
-    cardinal.tension = function(tension) {
-      return custom(+tension);
-    };
-
-    return cardinal;
-  })(0);
-
-  function CardinalClosed(context, tension) {
-    this._context = context;
-    this._k = (1 - tension) / 6;
-  }
-
-  CardinalClosed.prototype = {
-    areaStart: noop,
-    areaEnd: noop,
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
-      this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 1: {
-          this._context.moveTo(this._x3, this._y3);
-          this._context.closePath();
-          break;
-        }
-        case 2: {
-          this._context.lineTo(this._x3, this._y3);
-          this._context.closePath();
-          break;
-        }
-        case 3: {
-          this.point(this._x3, this._y3);
-          this.point(this._x4, this._y4);
-          this.point(this._x5, this._y5);
-          break;
-        }
+CardinalClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
       }
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
-        case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
-        case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
-        default: point$1(this, x, y); break;
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
       }
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
     }
-  };
-
-  var cardinalClosed = (function custom(tension) {
-
-    function cardinal(context) {
-      return new CardinalClosed(context, tension);
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$1(this, x, y); break;
     }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    cardinal.tension = function(tension) {
-      return custom(+tension);
-    };
+var cardinalClosed = (function custom(tension) {
 
-    return cardinal;
-  })(0);
-
-  function CardinalOpen(context, tension) {
-    this._context = context;
-    this._k = (1 - tension) / 6;
+  function cardinal(context) {
+    return new CardinalClosed(context, tension);
   }
 
-  CardinalOpen.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 =
-      this._y0 = this._y1 = this._y2 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
-        case 3: this._point = 4; // proceed
-        default: point$1(this, x, y); break;
-      }
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
-    }
+  cardinal.tension = function(tension) {
+    return custom(+tension);
   };
 
-  var cardinalOpen = (function custom(tension) {
+  return cardinal;
+})(0);
 
-    function cardinal(context) {
-      return new CardinalOpen(context, tension);
+function CardinalOpen(context, tension) {
+  this._context = context;
+  this._k = (1 - tension) / 6;
+}
+
+CardinalOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$1(this, x, y); break;
     }
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    cardinal.tension = function(tension) {
-      return custom(+tension);
-    };
+var cardinalOpen = (function custom(tension) {
 
-    return cardinal;
-  })(0);
+  function cardinal(context) {
+    return new CardinalOpen(context, tension);
+  }
 
-  function point$2(that, x, y) {
-    var x1 = that._x1,
-        y1 = that._y1,
-        x2 = that._x2,
-        y2 = that._y2;
+  cardinal.tension = function(tension) {
+    return custom(+tension);
+  };
 
-    if (that._l01_a > epsilon) {
-      var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
-          n = 3 * that._l01_a * (that._l01_a + that._l12_a);
-      x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
-      y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
-    }
+  return cardinal;
+})(0);
 
-    if (that._l23_a > epsilon) {
-      var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
-          m = 3 * that._l23_a * (that._l23_a + that._l12_a);
-      x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
-      y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
-    }
+function point$2(that, x, y) {
+  var x1 = that._x1,
+      y1 = that._y1,
+      x2 = that._x2,
+      y2 = that._y2;
 
-    that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
+  if (that._l01_a > epsilon) {
+    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
+        n = 3 * that._l01_a * (that._l01_a + that._l12_a);
+    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
+    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
   }
 
-  function CatmullRom(context, alpha) {
-    this._context = context;
-    this._alpha = alpha;
+  if (that._l23_a > epsilon) {
+    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
+        m = 3 * that._l23_a * (that._l23_a + that._l12_a);
+    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
+    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
   }
 
-  CatmullRom.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 =
-      this._y0 = this._y1 = this._y2 = NaN;
-      this._l01_a = this._l12_a = this._l23_a =
-      this._l01_2a = this._l12_2a = this._l23_2a =
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 2: this._context.lineTo(this._x2, this._y2); break;
-        case 3: this.point(this, this._x2, this._y2); break;
-      }
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
+  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
+}
 
-      if (this._point) {
-        var x23 = this._x2 - x,
-            y23 = this._y2 - y;
-        this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
-      }
+function CatmullRom(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
 
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; // proceed
-        default: point$2(this, x, y); break;
-      }
+CatmullRom.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x2, this._y2); break;
+      case 3: this.point(this._x2, this._y2); break;
+    }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
 
-      this._l01_a = this._l12_a, this._l12_a = this._l23_a;
-      this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
     }
-  };
 
-  var catmullRom = (function custom(alpha) {
-
-    function catmullRom(context) {
-      return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; // proceed
+      default: point$2(this, x, y); break;
     }
 
-    catmullRom.alpha = function(alpha) {
-      return custom(+alpha);
-    };
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    return catmullRom;
-  })(0.5);
+var catmullRom = (function custom(alpha) {
 
-  function CatmullRomClosed(context, alpha) {
-    this._context = context;
-    this._alpha = alpha;
+  function catmullRom(context) {
+    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
   }
 
-  CatmullRomClosed.prototype = {
-    areaStart: noop,
-    areaEnd: noop,
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
-      this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
-      this._l01_a = this._l12_a = this._l23_a =
-      this._l01_2a = this._l12_2a = this._l23_2a =
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 1: {
-          this._context.moveTo(this._x3, this._y3);
-          this._context.closePath();
-          break;
-        }
-        case 2: {
-          this._context.lineTo(this._x3, this._y3);
-          this._context.closePath();
-          break;
-        }
-        case 3: {
-          this.point(this._x3, this._y3);
-          this.point(this._x4, this._y4);
-          this.point(this._x5, this._y5);
-          break;
-        }
-      }
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
 
-      if (this._point) {
-        var x23 = this._x2 - x,
-            y23 = this._y2 - y;
-        this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
-      }
+  return catmullRom;
+})(0.5);
 
-      switch (this._point) {
-        case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
-        case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
-        case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
-        default: point$2(this, x, y); break;
+function CatmullRomClosed(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
+
+CatmullRomClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
+    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 1: {
+        this._context.moveTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
       }
+      case 2: {
+        this._context.lineTo(this._x3, this._y3);
+        this._context.closePath();
+        break;
+      }
+      case 3: {
+        this.point(this._x3, this._y3);
+        this.point(this._x4, this._y4);
+        this.point(this._x5, this._y5);
+        break;
+      }
+    }
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
 
-      this._l01_a = this._l12_a, this._l12_a = this._l23_a;
-      this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
     }
-  };
 
-  var catmullRomClosed = (function custom(alpha) {
-
-    function catmullRom(context) {
-      return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
+    switch (this._point) {
+      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
+      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
+      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
+      default: point$2(this, x, y); break;
     }
 
-    catmullRom.alpha = function(alpha) {
-      return custom(+alpha);
-    };
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    return catmullRom;
-  })(0.5);
+var catmullRomClosed = (function custom(alpha) {
 
-  function CatmullRomOpen(context, alpha) {
-    this._context = context;
-    this._alpha = alpha;
+  function catmullRom(context) {
+    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
   }
 
-  CatmullRomOpen.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 = this._x2 =
-      this._y0 = this._y1 = this._y2 = NaN;
-      this._l01_a = this._l12_a = this._l23_a =
-      this._l01_2a = this._l12_2a = this._l23_2a =
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
+  };
 
-      if (this._point) {
-        var x23 = this._x2 - x,
-            y23 = this._y2 - y;
-        this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
-      }
+  return catmullRom;
+})(0.5);
 
-      switch (this._point) {
-        case 0: this._point = 1; break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
-        case 3: this._point = 4; // proceed
-        default: point$2(this, x, y); break;
-      }
+function CatmullRomOpen(context, alpha) {
+  this._context = context;
+  this._alpha = alpha;
+}
 
-      this._l01_a = this._l12_a, this._l12_a = this._l23_a;
-      this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
-      this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
-      this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+CatmullRomOpen.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 = this._x2 =
+    this._y0 = this._y1 = this._y2 = NaN;
+    this._l01_a = this._l12_a = this._l23_a =
+    this._l01_2a = this._l12_2a = this._l23_2a =
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+
+    if (this._point) {
+      var x23 = this._x2 - x,
+          y23 = this._y2 - y;
+      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
     }
-  };
 
-  var catmullRomOpen = (function custom(alpha) {
-
-    function catmullRom(context) {
-      return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
+    switch (this._point) {
+      case 0: this._point = 1; break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
+      case 3: this._point = 4; // proceed
+      default: point$2(this, x, y); break;
     }
 
-    catmullRom.alpha = function(alpha) {
-      return custom(+alpha);
-    };
+    this._l01_a = this._l12_a, this._l12_a = this._l23_a;
+    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
+    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
+    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
+  }
+};
 
-    return catmullRom;
-  })(0.5);
+var catmullRomOpen = (function custom(alpha) {
 
-  function LinearClosed(context) {
-    this._context = context;
+  function catmullRom(context) {
+    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
   }
 
-  LinearClosed.prototype = {
-    areaStart: noop,
-    areaEnd: noop,
-    lineStart: function() {
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (this._point) this._context.closePath();
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      if (this._point) this._context.lineTo(x, y);
-      else this._point = 1, this._context.moveTo(x, y);
-    }
+  catmullRom.alpha = function(alpha) {
+    return custom(+alpha);
   };
 
-  function linearClosed(context) {
-    return new LinearClosed(context);
-  }
+  return catmullRom;
+})(0.5);
 
-  function sign(x) {
-    return x < 0 ? -1 : 1;
-  }
+function LinearClosed(context) {
+  this._context = context;
+}
 
-  // Calculate the slopes of the tangents (Hermite-type interpolation) based on
-  // the following paper: Steffen, M. 1990. A Simple Method for Monotonic
-  // Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
-  // NOV(II), P. 443, 1990.
-  function slope3(that, x2, y2) {
-    var h0 = that._x1 - that._x0,
-        h1 = x2 - that._x1,
-        s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
-        s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
-        p = (s0 * h1 + s1 * h0) / (h0 + h1);
-    return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
+LinearClosed.prototype = {
+  areaStart: noop,
+  areaEnd: noop,
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._point) this._context.closePath();
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    if (this._point) this._context.lineTo(x, y);
+    else this._point = 1, this._context.moveTo(x, y);
   }
+};
 
-  // Calculate a one-sided slope.
-  function slope2(that, t) {
-    var h = that._x1 - that._x0;
-    return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
-  }
+function linearClosed(context) {
+  return new LinearClosed(context);
+}
 
-  // According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
-  // "you can express cubic Hermite interpolation in terms of cubic Bézier curves
-  // with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
-  function point$3(that, t0, t1) {
-    var x0 = that._x0,
-        y0 = that._y0,
-        x1 = that._x1,
-        y1 = that._y1,
-        dx = (x1 - x0) / 3;
-    that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
-  }
+function sign(x) {
+  return x < 0 ? -1 : 1;
+}
 
-  function MonotoneX(context) {
-    this._context = context;
-  }
+// Calculate the slopes of the tangents (Hermite-type interpolation) based on
+// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
+// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
+// NOV(II), P. 443, 1990.
+function slope3(that, x2, y2) {
+  var h0 = that._x1 - that._x0,
+      h1 = x2 - that._x1,
+      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
+      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
+      p = (s0 * h1 + s1 * h0) / (h0 + h1);
+  return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
+}
 
-  MonotoneX.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x0 = this._x1 =
-      this._y0 = this._y1 =
-      this._t0 = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      switch (this._point) {
-        case 2: this._context.lineTo(this._x1, this._y1); break;
-        case 3: point$3(this, this._t0, slope2(this, this._t0)); break;
-      }
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      var t1 = NaN;
+// Calculate a one-sided slope.
+function slope2(that, t) {
+  var h = that._x1 - that._x0;
+  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
+}
 
-      x = +x, y = +y;
-      if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; break;
-        case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
-        default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;
-      }
+// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
+// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
+// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
+function point$3(that, t0, t1) {
+  var x0 = that._x0,
+      y0 = that._y0,
+      x1 = that._x1,
+      y1 = that._y1,
+      dx = (x1 - x0) / 3;
+  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
+}
 
-      this._x0 = this._x1, this._x1 = x;
-      this._y0 = this._y1, this._y1 = y;
-      this._t0 = t1;
+function MonotoneX(context) {
+  this._context = context;
+}
+
+MonotoneX.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x0 = this._x1 =
+    this._y0 = this._y1 =
+    this._t0 = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    switch (this._point) {
+      case 2: this._context.lineTo(this._x1, this._y1); break;
+      case 3: point$3(this, this._t0, slope2(this, this._t0)); break;
     }
-  }
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    var t1 = NaN;
 
-  function MonotoneY(context) {
-    this._context = new ReflectContext(context);
+    x = +x, y = +y;
+    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; break;
+      case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
+      default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;
+    }
+
+    this._x0 = this._x1, this._x1 = x;
+    this._y0 = this._y1, this._y1 = y;
+    this._t0 = t1;
   }
+}
 
-  (MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
-    MonotoneX.prototype.point.call(this, y, x);
-  };
+function MonotoneY(context) {
+  this._context = new ReflectContext(context);
+}
 
-  function ReflectContext(context) {
-    this._context = context;
-  }
+(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
+  MonotoneX.prototype.point.call(this, y, x);
+};
 
-  ReflectContext.prototype = {
-    moveTo: function(x, y) { this._context.moveTo(y, x); },
-    closePath: function() { this._context.closePath(); },
-    lineTo: function(x, y) { this._context.lineTo(y, x); },
-    bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
-  };
+function ReflectContext(context) {
+  this._context = context;
+}
 
-  function monotoneX(context) {
-    return new MonotoneX(context);
-  }
+ReflectContext.prototype = {
+  moveTo: function(x, y) { this._context.moveTo(y, x); },
+  closePath: function() { this._context.closePath(); },
+  lineTo: function(x, y) { this._context.lineTo(y, x); },
+  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
+};
 
-  function monotoneY(context) {
-    return new MonotoneY(context);
-  }
+function monotoneX(context) {
+  return new MonotoneX(context);
+}
 
-  function Natural(context) {
-    this._context = context;
-  }
+function monotoneY(context) {
+  return new MonotoneY(context);
+}
 
-  Natural.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x = [];
-      this._y = [];
-    },
-    lineEnd: function() {
-      var x = this._x,
-          y = this._y,
-          n = x.length;
+function Natural(context) {
+  this._context = context;
+}
 
-      if (n) {
-        this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
-        if (n === 2) {
-          this._context.lineTo(x[1], y[1]);
-        } else {
-          var px = controlPoints(x),
-              py = controlPoints(y);
-          for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
-            this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
-          }
+Natural.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = [];
+    this._y = [];
+  },
+  lineEnd: function() {
+    var x = this._x,
+        y = this._y,
+        n = x.length;
+
+    if (n) {
+      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
+      if (n === 2) {
+        this._context.lineTo(x[1], y[1]);
+      } else {
+        var px = controlPoints(x),
+            py = controlPoints(y);
+        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
+          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
         }
       }
-
-      if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
-      this._line = 1 - this._line;
-      this._x = this._y = null;
-    },
-    point: function(x, y) {
-      this._x.push(+x);
-      this._y.push(+y);
     }
-  };
 
-  // See https://www.particleincell.com/2012/bezier-splines/ for derivation.
-  function controlPoints(x) {
-    var i,
-        n = x.length - 1,
-        m,
-        a = new Array(n),
-        b = new Array(n),
-        r = new Array(n);
-    a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
-    for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
-    a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
-    for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
-    a[n - 1] = r[n - 1] / b[n - 1];
-    for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
-    b[n - 1] = (x[n] + a[n - 1]) / 2;
-    for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
-    return [a, b];
+    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+    this._x = this._y = null;
+  },
+  point: function(x, y) {
+    this._x.push(+x);
+    this._y.push(+y);
   }
+};
 
-  function natural(context) {
-    return new Natural(context);
-  }
+// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
+function controlPoints(x) {
+  var i,
+      n = x.length - 1,
+      m,
+      a = new Array(n),
+      b = new Array(n),
+      r = new Array(n);
+  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
+  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
+  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
+  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
+  a[n - 1] = r[n - 1] / b[n - 1];
+  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
+  b[n - 1] = (x[n] + a[n - 1]) / 2;
+  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
+  return [a, b];
+}
 
-  function Step(context, t) {
-    this._context = context;
-    this._t = t;
-  }
+function natural(context) {
+  return new Natural(context);
+}
 
-  Step.prototype = {
-    areaStart: function() {
-      this._line = 0;
-    },
-    areaEnd: function() {
-      this._line = NaN;
-    },
-    lineStart: function() {
-      this._x = this._y = NaN;
-      this._point = 0;
-    },
-    lineEnd: function() {
-      if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
-      if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
-      if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
-    },
-    point: function(x, y) {
-      x = +x, y = +y;
-      switch (this._point) {
-        case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
-        case 1: this._point = 2; // proceed
-        default: {
-          if (this._t <= 0) {
-            this._context.lineTo(this._x, y);
-            this._context.lineTo(x, y);
-          } else {
-            var x1 = this._x * (1 - this._t) + x * this._t;
-            this._context.lineTo(x1, this._y);
-            this._context.lineTo(x1, y);
-          }
-          break;
+function Step(context, t) {
+  this._context = context;
+  this._t = t;
+}
+
+Step.prototype = {
+  areaStart: function() {
+    this._line = 0;
+  },
+  areaEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._x = this._y = NaN;
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
+  },
+  point: function(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
+      case 1: this._point = 2; // proceed
+      default: {
+        if (this._t <= 0) {
+          this._context.lineTo(this._x, y);
+          this._context.lineTo(x, y);
+        } else {
+          var x1 = this._x * (1 - this._t) + x * this._t;
+          this._context.lineTo(x1, this._y);
+          this._context.lineTo(x1, y);
         }
+        break;
       }
-      this._x = x, this._y = y;
     }
-  };
-
-  function step(context) {
-    return new Step(context, 0.5);
+    this._x = x, this._y = y;
   }
+};
 
-  function stepBefore(context) {
-    return new Step(context, 0);
-  }
+function step(context) {
+  return new Step(context, 0.5);
+}
 
-  function stepAfter(context) {
-    return new Step(context, 1);
-  }
+function stepBefore(context) {
+  return new Step(context, 0);
+}
 
-  var slice = Array.prototype.slice;
+function stepAfter(context) {
+  return new Step(context, 1);
+}
 
-  function none(series, order) {
-    if (!((n = series.length) > 1)) return;
-    for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
-      s0 = s1, s1 = series[order[i]];
-      for (var j = 0; j < m; ++j) {
-        s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
-      }
+var slice = Array.prototype.slice;
+
+function none(series, order) {
+  if (!((n = series.length) > 1)) return;
+  for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
+    s0 = s1, s1 = series[order[i]];
+    for (var j = 0; j < m; ++j) {
+      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
     }
   }
+}
 
-  function none$1(series) {
-    var n = series.length, o = new Array(n);
-    while (--n >= 0) o[n] = n;
-    return o;
-  }
+function none$1(series) {
+  var n = series.length, o = new Array(n);
+  while (--n >= 0) o[n] = n;
+  return o;
+}
 
-  function stackValue(d, key) {
-    return d[key];
-  }
+function stackValue(d, key) {
+  return d[key];
+}
 
-  function stack() {
-    var keys = constant([]),
-        order = none$1,
-        offset = none,
-        value = stackValue;
+function stack() {
+  var keys = constant([]),
+      order = none$1,
+      offset = none,
+      value = stackValue;
 
-    function stack(data) {
-      var kz = keys.apply(this, arguments),
-          i,
-          m = data.length,
-          n = kz.length,
-          sz = new Array(n),
-          oz;
+  function stack(data) {
+    var kz = keys.apply(this, arguments),
+        i,
+        m = data.length,
+        n = kz.length,
+        sz = new Array(n),
+        oz;
 
-      for (i = 0; i < n; ++i) {
-        for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
-          si[j] = sij = [0, +value(data[j], ki, j, data)];
-          sij.data = data[j];
-        }
-        si.key = ki;
+    for (i = 0; i < n; ++i) {
+      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
+        si[j] = sij = [0, +value(data[j], ki, j, data)];
+        sij.data = data[j];
       }
+      si.key = ki;
+    }
 
-      for (i = 0, oz = order(sz); i < n; ++i) {
-        sz[oz[i]].index = i;
-      }
-
-      offset(sz, oz);
-      return sz;
+    for (i = 0, oz = order(sz); i < n; ++i) {
+      sz[oz[i]].index = i;
     }
 
-    stack.keys = function(_) {
-      return arguments.length ? (keys = typeof _ === "function" ? _ : constant(slice.call(_)), stack) : keys;
-    };
+    offset(sz, oz);
+    return sz;
+  }
 
-    stack.value = function(_) {
-      return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
-    };
+  stack.keys = function(_) {
+    return arguments.length ? (keys = typeof _ === "function" ? _ : constant(slice.call(_)), stack) : keys;
+  };
 
-    stack.order = function(_) {
-      return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant(slice.call(_)), stack) : order;
-    };
+  stack.value = function(_) {
+    return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
+  };
 
-    stack.offset = function(_) {
-      return arguments.length ? (offset = _ == null ? none : _, stack) : offset;
-    };
+  stack.order = function(_) {
+    return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant(slice.call(_)), stack) : order;
+  };
 
-    return stack;
-  }
+  stack.offset = function(_) {
+    return arguments.length ? (offset = _ == null ? none : _, stack) : offset;
+  };
 
-  function expand(series, order) {
-    if (!((n = series.length) > 0)) return;
-    for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
-      for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
-      if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
-    }
-    none(series, order);
+  return stack;
+}
+
+function expand(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
+    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
+    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
   }
+  none(series, order);
+}
 
-  function silhouette(series, order) {
-    if (!((n = series.length) > 0)) return;
-    for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
-      for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
-      s0[j][1] += s0[j][0] = -y / 2;
-    }
-    none(series, order);
+function silhouette(series, order) {
+  if (!((n = series.length) > 0)) return;
+  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
+    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
+    s0[j][1] += s0[j][0] = -y / 2;
   }
+  none(series, order);
+}
 
-  function wiggle(series, order) {
-    if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
-    for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
-      for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
-        var si = series[order[i]],
-            sij0 = si[j][1] || 0,
-            sij1 = si[j - 1][1] || 0,
-            s3 = (sij0 - sij1) / 2;
-        for (var k = 0; k < i; ++k) {
-          var sk = series[order[k]],
-              skj0 = sk[j][1] || 0,
-              skj1 = sk[j - 1][1] || 0;
-          s3 += skj0 - skj1;
-        }
-        s1 += sij0, s2 += s3 * sij0;
+function wiggle(series, order) {
+  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
+  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
+    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
+      var si = series[order[i]],
+          sij0 = si[j][1] || 0,
+          sij1 = si[j - 1][1] || 0,
+          s3 = (sij0 - sij1) / 2;
+      for (var k = 0; k < i; ++k) {
+        var sk = series[order[k]],
+            skj0 = sk[j][1] || 0,
+            skj1 = sk[j - 1][1] || 0;
+        s3 += skj0 - skj1;
       }
-      s0[j - 1][1] += s0[j - 1][0] = y;
-      if (s1) y -= s2 / s1;
+      s1 += sij0, s2 += s3 * sij0;
     }
     s0[j - 1][1] += s0[j - 1][0] = y;
-    none(series, order);
+    if (s1) y -= s2 / s1;
   }
+  s0[j - 1][1] += s0[j - 1][0] = y;
+  none(series, order);
+}
 
-  function ascending(series) {
-    var sums = series.map(sum);
-    return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });
-  }
+function ascending(series) {
+  var sums = series.map(sum);
+  return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });
+}
 
-  function sum(series) {
-    var s = 0, i = -1, n = series.length, v;
-    while (++i < n) if (v = +series[i][1]) s += v;
-    return s;
-  }
+function sum(series) {
+  var s = 0, i = -1, n = series.length, v;
+  while (++i < n) if (v = +series[i][1]) s += v;
+  return s;
+}
 
-  function descending$1(series) {
-    return ascending(series).reverse();
-  }
+function descending$1(series) {
+  return ascending(series).reverse();
+}
 
-  function insideOut(series) {
-    var n = series.length,
-        i,
-        j,
-        sums = series.map(sum),
-        order = none$1(series).sort(function(a, b) { return sums[b] - sums[a]; }),
-        top = 0,
-        bottom = 0,
-        tops = [],
-        bottoms = [];
+function insideOut(series) {
+  var n = series.length,
+      i,
+      j,
+      sums = series.map(sum),
+      order = none$1(series).sort(function(a, b) { return sums[b] - sums[a]; }),
+      top = 0,
+      bottom = 0,
+      tops = [],
+      bottoms = [];
 
-    for (i = 0; i < n; ++i) {
-      j = order[i];
-      if (top < bottom) {
-        top += sums[j];
-        tops.push(j);
-      } else {
-        bottom += sums[j];
-        bottoms.push(j);
-      }
+  for (i = 0; i < n; ++i) {
+    j = order[i];
+    if (top < bottom) {
+      top += sums[j];
+      tops.push(j);
+    } else {
+      bottom += sums[j];
+      bottoms.push(j);
     }
-
-    return bottoms.reverse().concat(tops);
   }
 
-  function reverse(series) {
-    return none$1(series).reverse();
-  }
+  return bottoms.reverse().concat(tops);
+}
 
-  exports.arc = arc;
-  exports.area = area;
-  exports.line = line;
-  exports.pie = pie;
-  exports.radialArea = radialArea;
-  exports.radialLine = radialLine$1;
-  exports.symbol = symbol;
-  exports.symbols = symbols;
-  exports.symbolCircle = circle;
-  exports.symbolCross = cross;
-  exports.symbolDiamond = diamond;
-  exports.symbolSquare = square;
-  exports.symbolStar = star;
-  exports.symbolTriangle = triangle;
-  exports.symbolWye = wye;
-  exports.curveBasisClosed = basisClosed;
-  exports.curveBasisOpen = basisOpen;
-  exports.curveBasis = basis;
-  exports.curveBundle = bundle;
-  exports.curveCardinalClosed = cardinalClosed;
-  exports.curveCardinalOpen = cardinalOpen;
-  exports.curveCardinal = cardinal;
-  exports.curveCatmullRomClosed = catmullRomClosed;
-  exports.curveCatmullRomOpen = catmullRomOpen;
-  exports.curveCatmullRom = catmullRom;
-  exports.curveLinearClosed = linearClosed;
-  exports.curveLinear = curveLinear;
-  exports.curveMonotoneX = monotoneX;
-  exports.curveMonotoneY = monotoneY;
-  exports.curveNatural = natural;
-  exports.curveStep = step;
-  exports.curveStepAfter = stepAfter;
-  exports.curveStepBefore = stepBefore;
-  exports.stack = stack;
-  exports.stackOffsetExpand = expand;
-  exports.stackOffsetNone = none;
-  exports.stackOffsetSilhouette = silhouette;
-  exports.stackOffsetWiggle = wiggle;
-  exports.stackOrderAscending = ascending;
-  exports.stackOrderDescending = descending$1;
-  exports.stackOrderInsideOut = insideOut;
-  exports.stackOrderNone = none$1;
-  exports.stackOrderReverse = reverse;
+function reverse(series) {
+  return none$1(series).reverse();
+}
 
-  Object.defineProperty(exports, '__esModule', { value: true });
+exports.arc = arc;
+exports.area = area;
+exports.line = line;
+exports.pie = pie;
+exports.radialArea = radialArea;
+exports.radialLine = radialLine$1;
+exports.symbol = symbol;
+exports.symbols = symbols;
+exports.symbolCircle = circle;
+exports.symbolCross = cross;
+exports.symbolDiamond = diamond;
+exports.symbolSquare = square;
+exports.symbolStar = star;
+exports.symbolTriangle = triangle;
+exports.symbolWye = wye;
+exports.curveBasisClosed = basisClosed;
+exports.curveBasisOpen = basisOpen;
+exports.curveBasis = basis;
+exports.curveBundle = bundle;
+exports.curveCardinalClosed = cardinalClosed;
+exports.curveCardinalOpen = cardinalOpen;
+exports.curveCardinal = cardinal;
+exports.curveCatmullRomClosed = catmullRomClosed;
+exports.curveCatmullRomOpen = catmullRomOpen;
+exports.curveCatmullRom = catmullRom;
+exports.curveLinearClosed = linearClosed;
+exports.curveLinear = curveLinear;
+exports.curveMonotoneX = monotoneX;
+exports.curveMonotoneY = monotoneY;
+exports.curveNatural = natural;
+exports.curveStep = step;
+exports.curveStepAfter = stepAfter;
+exports.curveStepBefore = stepBefore;
+exports.stack = stack;
+exports.stackOffsetExpand = expand;
+exports.stackOffsetNone = none;
+exports.stackOffsetSilhouette = silhouette;
+exports.stackOffsetWiggle = wiggle;
+exports.stackOrderAscending = ascending;
+exports.stackOrderDescending = descending$1;
+exports.stackOrderInsideOut = insideOut;
+exports.stackOrderNone = none$1;
+exports.stackOrderReverse = reverse;
 
-}));
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));

build/d3-shape.min.js

@@ -1,2 +0,2 @@
-// https://d3js.org/d3-shape/ Version 1.0.2. Copyright 2016 Mike Bostock.
-!function(t,i){"object"==typeof exports&&"undefined"!=typeof module?i(exports,require("d3-path")):"function"==typeof define&&define.amd?define(["exports","d3-path"],i):i(t.d3=t.d3||{},t.d3)}(this,function(t,i){"use strict";function n(t){return function(){return t}}function e(t){return t.innerRadius}function s(t){return t.outerRadius}function h(t){return t.startAngle}function o(t){return t.endAngle}function _(t){return t&&t.padAngle}function a(t){return t>=1?bt:t<=-1?-bt:Math.asin(t)}function r(t,i,n,e,s,h,o,_){var a=n-t,r=e-i,c=o-s,l=_-h,u=(c*(i-h)-l*(t-s))/(l*a-c*r);return[t+u*a,i+u*r]}function c(t,i,n,e,s,h,o){var _=t-n,a=i-e,r=(o?h:-h)/Math.sqrt(_*_+a*a),c=r*a,l=-r*_,u=t+c,f=i+l,x=n+c,y=e+l,p=(u+x)/2,v=(f+y)/2,d=x-u,T=y-f,M=d*d+T*T,g=s-h,b=u*y-x*f,w=(T<0?-1:1)*Math.sqrt(Math.max(0,g*g*M-b*b)),m=(b*T-d*w)/M,k=(-b*d-T*w)/M,N=(b*T+d*w)/M,S=(-b*d+T*w)/M,E=m-p,A=k-v,P=N-p,q=S-v;return E*E+A*A>P*P+q*q&&(m=N,k=S),{cx:m,cy:k,x01:-c,y01:-l,x11:m*(s/g-1),y11:k*(s/g-1)}}function l(){function 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3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,i){if(t=+t,i=+i,this._point){var n=this._x2-t,e=this._y2-i;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(n*n+e*e,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=i;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=i);break;case 2:this._point=3,this._x5=t,this._y5=i;break;default:I(this,t,i)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=i}};var Kt=function t(i){function n(t){return i?new D(t,i):new B(t,0)}return n.alpha=function(i){return t(+i)},n}(.5);W.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,i){if(t=+t,i=+i,this._point){var n=this._x2-t,e=this._y2-i;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(n*n+e*e,this._alpha))}switch(this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:I(this,t,i)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=i}};var Qt=function t(i){function n(t){return i?new W(t,i):new j(t,0)}return n.alpha=function(i){return t(+i)},n}(.5);V.prototype={areaStart:S,areaEnd:S,lineStart:function(){this._point=0},lineEnd:function(){this._point&&this._context.closePath()},point:function(t,i){t=+t,i=+i,this._point?this._context.lineTo(t,i):(this._point=1,this._context.moveTo(t,i))}},Q.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=this._t0=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x1,this._y1);break;case 3:K(this,this._t0,J(this,this._t0))}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,i){var n=NaN;if(t=+t,i=+i,t!==this._x1||i!==this._y1){switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,i):this._context.moveTo(t,i);break;case 1:this._point=2;break;case 2:this._point=3,K(this,J(this,n=H(this,t,i)),n);break;default:K(this,this._t0,n=H(this,t,i))}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=i,this._t0=n}}},(U.prototype=Object.create(Q.prototype)).point=function(t,i){Q.prototype.point.call(this,i,t)},Z.prototype={moveTo:function(t,i){this._context.moveTo(i,t)},closePath:function(){this._context.closePath()},lineTo:function(t,i){this._context.lineTo(i,t)},bezierCurveTo:function(t,i,n,e,s,h){this._context.bezierCurveTo(i,t,e,n,h,s)}},it.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=[],this._y=[]},lineEnd:function(){var t=this._x,i=this._y,n=t.length;if(n)if(this._line?this._context.lineTo(t[0],i[0]):this._context.moveTo(t[0],i[0]),2===n)this._context.lineTo(t[1],i[1]);else for(var e=nt(t),s=nt(i),h=0,o=1;o<n;++h,++o)this._context.bezierCurveTo(e[0][h],s[0][h],e[1][h],s[1][h],t[o],i[o]);(this._line||0!==this._line&&1===n)&&this._context.closePath(),this._line=1-this._line,this._x=this._y=null},point:function(t,i){this._x.push(+t),this._y.push(+i)}},st.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=this._y=NaN,this._point=0},lineEnd:function(){0<this._t&&this._t<1&&2===this._point&&this._context.lineTo(this._x,this._y),(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line>=0&&(this._t=1-this._t,this._line=1-this._line)},point:function(t,i){switch(t=+t,i=+i,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,i):this._context.moveTo(t,i);break;case 1:this._point=2;default:if(this._t<=0)this._context.lineTo(this._x,i),this._context.lineTo(t,i);else{var n=this._x*(1-this._t)+t*this._t;this._context.lineTo(n,this._y),this._context.lineTo(n,i)}}this._x=t,this._y=i}};var Ut=Array.prototype.slice;t.arc=l,t.area=v,t.line=p,t.pie=M,t.radialArea=k,t.radialLine=m,t.symbol=N,t.symbols=Wt,t.symbolCircle=kt,t.symbolCross=Nt,t.symbolDiamond=At,t.symbolSquare=zt,t.symbolStar=Rt,t.symbolTriangle=Yt,t.symbolWye=Dt,t.curveBasisClosed=C,t.curveBasisOpen=R,t.curveBasis=P,t.curveBundle=Vt,t.curveCardinalClosed=Gt,t.curveCardinalOpen=Ht,t.curveCardinal=Ft,t.curveCatmullRomClosed=Kt,t.curveCatmullRomOpen=Qt,t.curveCatmullRom=Jt,t.curveLinearClosed=F,t.curveLinear=f,t.curveMonotoneX=$,t.curveMonotoneY=tt,t.curveNatural=et,t.curveStep=ht,t.curveStepAfter=_t,t.curveStepBefore=ot,t.stack=lt,t.stackOffsetExpand=ut,t.stackOffsetNone=at,t.stackOffsetSilhouette=ft,t.stackOffsetWiggle=xt,t.stackOrderAscending=yt,t.stackOrderDescending=vt,t.stackOrderInsideOut=dt,t.stackOrderNone=rt,t.stackOrderReverse=Tt,Object.defineProperty(t,"__esModule",{value:!0})});

package.json

 {
   "name": "d3-shape",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Graphical primitives for visualization, such as lines and areas.",
@@ -5,0 +5,0 @@ "keywords": [

src/curve/catmullRom.js

@@ -49,3 +49,3 @@ import {epsilon} from "../math";
       case 2: this._context.lineTo(this._x2, this._y2); break;
-      case 3: this.point(this, this._x2, this._y2); break;
+      case 3: this.point(this._x2, this._y2); break;
     }
@@ -52,0 +52,0 @@ if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();

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