JavaScriptCollection
diff --git a/‎src/svg/line.js‎
Lines changed: 3 additions & 3 deletions b/‎src/svg/line.js‎
Lines changed: 3 additions & 3 deletions
diff --git a/‎test/svg/line-test.js‎
Lines changed: 1 addition & 1 deletion b/‎test/svg/line-test.js‎
Lines changed: 1 addition & 1 deletion
@@ -130,10 +130,10 @@ function d3_svg_lineStepBefore(points) {
 
 // Step interpolation; generates "H" and "V" commands.
 function d3_svg_lineStep(points) {
-  var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
+  var i = 0, n = points.length, p0, p1 = points[0], path = [ p1[0], ",", p1[1] ];
   while (++i < n) {
-    var prev = points[i-1], p = points[i];
-    path.push("H", (p[0] - prev[0])/2 + prev[0], "V", p[1], "H", p[0]);
+    p0 = p1, p1 = points[i];
+    path.push("H", (p0[0] + p1[0]) / 2, "V", p1[1], "H", p1[0]);
   }
   return path.join("");
 }
 
@@ -93,7 +93,7 @@ suite.addBatch({
         assert.pathEqual(l([[0, 0], [1, 1]]), "M0,0V1H1");
         assert.pathEqual(l([[0, 0], [1, 1], [2, 0]]), "M0,0V1H1V0H2");
       },
-      "supports step-middle interpolation": function(line) {
+      "supports step interpolation": function(line) {
         var l = line().interpolate("step");
         assert.pathEqual(l([[0, 0]]), "M0,0");
         assert.pathEqual(l([[0, 0], [1, 1]]), "M0,0H0.5V1H1");
Original file line number	Diff line number	Diff line change
`@@ -130,10 +130,10 @@ function d3_svg_lineStepBefore(points) {`
`130`	`130`
`131`	`131`	`// Step interpolation; generates "H" and "V" commands.`
`132`	`132`	`function d3_svg_lineStep(points) {`
`133`		`- var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];`
	`133`	`+ var i = 0, n = points.length, p0, p1 = points[0], path = [ p1[0], ",", p1[1] ];`
`134`	`134`	`while (++i < n) {`
`135`		`- var prev = points[i-1], p = points[i];`
`136`		`- path.push("H", (p[0] - prev[0])/2 + prev[0], "V", p[1], "H", p[0]);`
	`135`	`+ p0 = p1, p1 = points[i];`
	`136`	`+ path.push("H", (p0[0] + p1[0]) / 2, "V", p1[1], "H", p1[0]);`
`137`	`137`	`}`
`138`	`138`	`return path.join("");`
`139`	`139`	`}`