From a83eb21d058091e75d5a3d247220d31086b2655c Mon Sep 17 00:00:00 2001
From: Helene Moorman <hgm110@gmail.com>
Date: Sat, 21 Feb 2015 23:27:19 -0800
Subject: [PATCH] added graph.resample method to prevent browser crash from
 trying to plot too many points

---
 kiln/static/js/temp_graph.js | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/kiln/static/js/temp_graph.js b/kiln/static/js/temp_graph.js
index 20a792b..75ea343 100644
--- a/kiln/static/js/temp_graph.js
+++ b/kiln/static/js/temp_graph.js
@@ -150,7 +150,33 @@ var tempgraph = (function(module) {
         this.y.domain(extent);
         this.draw();
     }
+    module.Graph.prototype.resample = function(data) {
+        var npoints = 1000;
+        var idxs = []
+        for (var i=0;i<data.length;i++)
+            idxs.push(i);
+        var within = [];
+        var within_idx = [];
+        for (var i=0; i<data.length; i++) {
+            if (data[i].x>=this.xlim()[0] && data[i].x<=this.xlim()[1]) {
+                within.push(data[i]);
+                within_idx.push(idxs[i]);
+            }
+        }
+        if (within.length>npoints) {
+            md = Math.floor(within.length/npoints);
+            var fin = []
+            for (var i=0; i<within.length; i++) {
+                if (within_idx[i]%md==0)
+                    fin.push(within[i]);
+            }
+            return fin;
+        }
+        else
+            return within;
+    }
     module.Graph.prototype.update = function(className, data) {
+        var data = this.resample(data);
         this.lines[className].data = data;
         this.axes.select("path."+className).datum(data)
             .attr("d", this.lines[className].line);