From 4fbe9d10608970971c97cd44fc903a7b806569d8 Mon Sep 17 00:00:00 2001
From: Sven Czarnian <devel@svcz.de>
Date: Tue, 14 Dec 2021 11:23:18 +0100
Subject: [PATCH] refactor the ETA estimation

---
 aman/sys/aco/RunwayManager.py | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/aman/sys/aco/RunwayManager.py b/aman/sys/aco/RunwayManager.py
index 2613f8f..eefb942 100644
--- a/aman/sys/aco/RunwayManager.py
+++ b/aman/sys/aco/RunwayManager.py
@@ -50,13 +50,11 @@ class RunwayManager:
             arrivalTime = node.ArrivalCandidates[runway].InitialArrivalTime
 
         if None == constrainedETA:
-            return max(arrivalTime, earliestArrivalTime), timedelta(seconds = 0)
+            eta = max(arrivalTime, earliestArrivalTime)
         else:
             eta = max(constrainedETA, earliestArrivalTime)
-            if eta < arrivalTime:
-                return arrivalTime, arrivalTime - eta
-            else:
-                return eta, timedelta(seconds = 0)
+
+        return eta, eta - arrivalTime
 
     def selectShallShouldMayArrivalRunway(self, node : Node, runways, useETA : bool, earliestArrivalTime : datetime):
         candidate = None