From 162fcf9d72ecdad8639e0935556395a3ccf7830e Mon Sep 17 00:00:00 2001
From: Matt Huntington <matt.huntington@gmail.com>
Date: Wed, 24 Aug 2016 00:29:24 -0400
Subject: [PATCH] comment for saving lastTransform

---
 public/js/app.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/public/js/app.js b/public/js/app.js
index 37c2d08..af25614 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -141,7 +141,7 @@ d3.select('svg').append('g').attr('id', 'y-axis').call(yAxis); //y axis is good
 
 //callback for zooming
 var zoomCallback = function(){
-	lastTransform = d3.event.transform;
+	lastTransform = d3.event.transform; //save the transform for later inversion with clicks
 	d3.select('#points').attr("transform", d3.event.transform); //apply transform to g element containing circles
 	//recalculate the axes
 	d3.select('#x-axis').call(xAxis.scale(d3.event.transform.rescaleX(xScale)));