reduce default ptracksInterval to 10

README.md

@@ -289,7 +289,7 @@ sudo wget -nv -O /usr/local/share/tar1090/html/upintheair.json "http://www.heywh
 - Can be filtered by altitude with the altitude filter
 - Configure a longer duration than 8 hours via the [configuration](#configuration-part-1-history-interval-and-number-of-snapshots--ptracks-duration-optional)
 - Restrict the duration shown to 2 hours: /tar1090/?pTracks=2
-- Draw less points which reduces display time (higher interval, lower compute time, default 30): /tar1090/?pTracks=8&pTracksInterval=60
+- Draw less points which reduces display time (higher interval, lower compute time, default 15): /tar1090/?pTracks=8&pTracksInterval=60
 
 ## 0800-DESTROY-SD-CARD
 

html/early.js

@@ -33,7 +33,7 @@ let replay = false;
 let rData = [];
 let StaleReceiverCount = 0;
 let pTracks = false;
-let pTracksInterval = 30;
+let pTracksInterval = 15;
 let lastTraceGet = 0;
 let traceRate = 0;
 let _aircraft_type_cache = null;
@@ -175,7 +175,7 @@ if (usp.has('heatmap')) {
 }
 {
     let value;
-    if (value = usp.getFloat('pTracksInterval')) {
+    if ((value = usp.getFloat('pTracksInterval')) != null) {
         pTracksInterval = value;
     }
 }

html/planeObject.js

@@ -539,7 +539,7 @@ PlaneObject.prototype.updateTrack = function(now, last, serverTrack, stale) {
     // Add current position to the existing track.
     // We only retain some points depending on time elapsed and track change
     let turn_density = 6.5;
-    if (pTracks) turn_density = 3;
+    if (pTracks && pTracksInterval > 5) turn_density = 3;
     if (
         since_update > 86 + !!pTracks * 90 ||
         (!on_ground && since_update > (100/turn_density)/track_change) ||