# HG changeset patch
# User IBBoard <dev@ibboard.co.uk>
# Date 1496519654 -3600
# Node ID a803fabf200ef72124fa4a55d98fa48aee095dc2
# Parent  865243a387a54ae2a3a000878f20cedfba396439
Fix overflow for bee positions with lots of photos at one time

diff -r 865243a387a5 -r a803fabf200e exif-graphr.js
--- a/exif-graphr.js	Mon May 29 16:53:54 2017 +0100
+++ b/exif-graphr.js	Sat Jun 03 20:54:14 2017 +0100
@@ -246,7 +246,9 @@
 var timelineScale = d3.scaleTime().rangeRound([0,960]);
 var timelineAxis = d3.axisBottom(timelineScale);
 var timelineAxes = timeline.append("g").attr("transform", "translate(0,75)");
-var timelineNodes = timeline.append("g");
+var timelineNodes = timeline.append("g").attr("transform", "translate(0,75)");
+var furthestBee = -Infinity;
+var maxBeeDistance = 70;
 
 function update() {
 	var photos = [];
@@ -374,12 +376,21 @@
 		.orientation('horizontal')
 		.side('symetric')
 		.arrange();
+	furthestBee = d3.max(swarm, function(bee) { return Math.abs(bee.y);});
 	var nodes = timelineNodes.selectAll('circle')
 		.data(swarm);
 	nodes.exit().remove();
 	var newNodes = nodes.enter().append('circle');
 	nodes.merge(newNodes)
 		.attr('cx', function(bee) { return bee.x; })
-		.attr('cy', function(bee) { return bee.y + 75; })
+		.attr('cy', function(bee) { return calculateBeeY(bee); })
 		.attr('r', 4)
+}
+
+function calculateBeeY(bee) {
+	if (furthestBee < maxBeeDistance) {
+		return bee.y;
+	} else {
+		return bee.y % maxBeeDistance;
+	}
 }
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