From 7ddc198171faa9750d3666b2809df4900e70e598 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kr=C3=B3lik=20Uszasty?= <bunny@awril.pl>
Date: Sun, 15 Sep 2019 21:48:03 +0200
Subject: [PATCH] Fix for wheel flat calculation when going backwards

---
 McZapkie/Mover.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/McZapkie/Mover.cpp b/McZapkie/Mover.cpp
index b92d6d0f..8d46fbcb 100644
--- a/McZapkie/Mover.cpp
+++ b/McZapkie/Mover.cpp
@@ -4504,7 +4504,7 @@ void TMoverParameters::ComputeTotalForce(double dt) {
 			Fb *= factor;
 			FTrain *= factor;
 		}
-		if (nrot < 0.1)
+		if (std::abs(nrot < 0.1))
 		{
 			WheelFlat = sqrt(square(WheelFlat) + abs(Fwheels) / NAxles*Vel*0.000002);
 		}