Add center point to stack layout.

choppa1890 · May 7, 2013 · 720754f · 720754f
1 parent 70167da
commit 720754f
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Showing 3 changed files with 12 additions and 6 deletions.
diff --git a/src/data/stack.js b/src/data/stack.js
@@ -5,17 +5,20 @@ vg.data.stack = function() {
       params = ["offset", "order"],
       output = {
         "y0": "y2",
-        "y1": "y"
+        "y1": "y",
+        "cy": "cy"
       };
 
   function stack(data) {
     var out_y0 = output["y0"],
-        out_y1 = output["y1"];
+        out_y1 = output["y1"],
+        out_cy = output["cy"];
 
     layout.out(function(d, y0, y) {
       if (d.datum) {
         d.datum[out_y0] = y0;
         d.datum[out_y1] = y + y0;
+        d.datum[out_cy] = y0 + y/2;
       }
     })(stacks(data));
 

diff --git a/vega.js b/vega.js
@@ -3035,17 +3035,20 @@ function vg_load_http(url, callback) {
       params = ["offset", "order"],
       output = {
         "y0": "y2",
-        "y1": "y"
+        "y1": "y",
+        "cy": "cy"
       };
 
   function stack(data) {
     var out_y0 = output["y0"],
-        out_y1 = output["y1"];
+        out_y1 = output["y1"],
+        out_cy = output["cy"];
 
     layout.out(function(d, y0, y) {
       if (d.datum) {
         d.datum[out_y0] = y0;
         d.datum[out_y1] = y + y0;
+        d.datum[out_cy] = y0 + y/2;
       }
     })(stacks(data));