From: durk <durk>
Date: Wed, 27 Dec 2006 10:02:13 +0000 (+0000)
Subject: Change the traffic manager's position calculations to use a spherical
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=bd34d34d16fd582eced9ddf0a5851b852dee4df5;p=flightgear.git

Change the traffic manager's position calculations to use a spherical
earth model instead of WGS84. WGS84 precision is overkill for what the
traffic manager requires, and also keeps locking up while computing
course and distance for anti podal points in New Zealand vs. south west
france.
---

diff --git a/src/Traffic/Schedule.cxx b/src/Traffic/Schedule.cxx
index 9aa64dc12..6692c8cc8 100644
--- a/src/Traffic/Schedule.cxx
+++ b/src/Traffic/Schedule.cxx
@@ -348,13 +348,16 @@ bool FGAISchedule::update(time_t now)
 	  
 	  SGWayPoint current  (lon,
 			       lat,
-			       (*i)->getCruiseAlt());
+			       (*i)->getCruiseAlt(), 
+			       SGWayPoint::SPHERICAL);
 	  SGWayPoint user (   userLongitude,
 			      userLatitude,
-			      (*i)->getCruiseAlt());
+			      (*i)->getCruiseAlt(), 
+			      SGWayPoint::SPHERICAL);
 	  SGWayPoint dest (   arr->getLongitude(),
 			      arr->getLatitude(),
-			      (*i)->getCruiseAlt());
+			      (*i)->getCruiseAlt(), 
+			      SGWayPoint::SPHERICAL);
 	  // We really only need distance to user
 	  // and course to destination 
 	  user.CourseAndDistance(current, &courseToUser, &distanceToUser);
@@ -474,10 +477,12 @@ double FGAISchedule::getSpeed()
  
   SGWayPoint dest (   dep->getLongitude(),
 		      dep->getLatitude(),
-		      (*i)->getCruiseAlt()); 
+		      (*i)->getCruiseAlt(), 
+		      SGWayPoint::SPHERICAL); 
   SGWayPoint curr (    arr->getLongitude(),
 		      arr->getLatitude(),
-		       (*i)->getCruiseAlt());
+		       (*i)->getCruiseAlt(), 
+		       SGWayPoint::SPHERICAL);
   remainingTimeEnroute     = (*i)->getArrivalTime() - (*i)->getDepartureTime();
   dest.CourseAndDistance(curr, &courseToDest, &distanceToDest);
   speed =  (distanceToDest*SG_METER_TO_NM) /