From 80d09825bb454f3a270fd2c3afa117510c3d1457 Mon Sep 17 00:00:00 2001
From: hiker <henrichsjoerg@gmail.com>
Date: Thu, 3 Jul 2014 16:53:12 +1000
Subject: [PATCH] Fix (potential) problem with exponential spring response
 (which is not used atm).

---
 src/physics/btKart.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/physics/btKart.cpp b/src/physics/btKart.cpp
index c195e4535..bdb8f556c 100644
--- a/src/physics/btKart.cpp
+++ b/src/physics/btKart.cpp
@@ -589,7 +589,7 @@ void btKart::updateSuspension(btScalar deltaTime)
         btScalar current_length = wheel_info.m_raycastInfo.m_suspensionLength;
         btScalar length_diff    = (susp_length - current_length);
         if(m_kart->getKartProperties()->getExpSpringResponse())
-            length_diff *= length_diff/susp_length;
+            length_diff *= fabsf(length_diff)/susp_length;
 
         force = wheel_info.m_suspensionStiffness * length_diff
               * wheel_info.m_clippedInvContactDotSuspension;