From d5e43b643f937f275862e9fad5f38fdebffd882f Mon Sep 17 00:00:00 2001
From: Matthias Wirth <matthias.wirth@gmail.com>
Date: Mon, 5 Aug 2019 12:32:28 +0200
Subject: [PATCH] don't delete old positions, it just creates a mess

---
 html/planeObject.js | 36 +++++++++++++++++++-----------------
 html/script.js      |  6 +++++-
 2 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/html/planeObject.js b/html/planeObject.js
index 67d0a85..d7d89b0 100644
--- a/html/planeObject.js
+++ b/html/planeObject.js
@@ -674,9 +674,7 @@ PlaneObject.prototype.updateTick = function(receiver_timestamp, last_timestamp,
 
 	// If no packet in over 58 seconds, clear the plane.
 	// Only clear the plane if it's not selected individually
-	if (this.seen_pos > 100  && (!this.selected || SelectedAllPlanes) )
-		this.position = null;
-	if ((this.seen > 58 || this.position == null)
+	if ((this.seen > 58 || this.position == null || this.seen_pos > 100)
 		&& (!this.selected || SelectedAllPlanes)) {
 		if (this.visible) {
 			//console.log("hiding " + this.icao);
@@ -789,6 +787,24 @@ PlaneObject.prototype.updateLines = function() {
 		})
 	});
 
+	// create any missing fixed line features
+	for (var i = 0; i < this.track_linesegs.length; ++i) {
+		var seg = this.track_linesegs[i];
+		if (!seg.feature) {
+			seg.feature = new ol.Feature(seg.fixed);
+			if (seg.estimated) {
+				seg.feature.setStyle(estimateStyle);
+			} else {
+				seg.feature.setStyle(this.altitudeLines(seg.altitude));
+			}
+
+			PlaneTrailFeatures.push(seg.feature);
+		}
+	}
+
+	if (!this.position)
+		return;
+
 	// find the old elastic band so we can replace it in place
 	// (which should be faster than remove-and-add when PlaneTrailFeatures is large)
 	var oldElastic = -1;
@@ -813,20 +829,6 @@ PlaneObject.prototype.updateLines = function() {
 		PlaneTrailFeatures.setAt(oldElastic, this.elastic_feature);
 	}
 
-	// create any missing fixed line features
-	for (var i = 0; i < this.track_linesegs.length; ++i) {
-		var seg = this.track_linesegs[i];
-		if (!seg.feature) {
-			seg.feature = new ol.Feature(seg.fixed);
-			if (seg.estimated) {
-				seg.feature.setStyle(estimateStyle);
-			} else {
-				seg.feature.setStyle(this.altitudeLines(seg.altitude));
-			}
-
-			PlaneTrailFeatures.push(seg.feature);
-		}
-	}
 };
 
 PlaneObject.prototype.destroy = function() {
diff --git a/html/script.js b/html/script.js
index 3d8918d..b4cfaf6 100644
--- a/html/script.js
+++ b/html/script.js
@@ -569,8 +569,12 @@ function parse_history() {
 
 		// Final pass to update all planes to their latest state
 		console.log("Final history cleanup pass");
-		for (var i = 0; i < PlanesOrdered.length; ++i) {
+		for (var i in PlanesOrdered) {
 			var plane = PlanesOrdered[i];
+
+			if (plane.position && SitePosition)
+				plane.sitedist = ol.sphere.getDistance(SitePosition, plane.position);
+
 			if (plane.dataSource == "uat")
 				plane.updateTick(uat_now, uat_last, true);
 			else