From 2cb1d5240e41639b9c84aa6607aab0df49f353a7 Mon Sep 17 00:00:00 2001
From: Robert Adams
Date: Sun, 20 Jan 2013 13:11:00 -0800
Subject: BulletSim: small fix making sure terrain height is calculated
 properly if the vehicle moves during vehicle actions.

---
 OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'OpenSim/Region/Physics')

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
index 7c9b83b..388d4f9 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
@@ -720,10 +720,12 @@ namespace OpenSim.Region.Physics.BulletSPlugin
 
         // Since the computation of terrain height can be a little involved, this routine
         //    is used to fetch the height only once for each vehicle simulation step.
+        Vector3 lastRememberedHeightPos;
         private float GetTerrainHeight(Vector3 pos)
         {
-            if ((m_knownHas & m_knownChangedTerrainHeight) == 0)
+            if ((m_knownHas & m_knownChangedTerrainHeight) == 0 || pos != lastRememberedHeightPos)
             {
+                lastRememberedHeightPos = pos;
                 m_knownTerrainHeight = Prim.PhysicsScene.TerrainManager.GetTerrainHeightAtXYZ(pos);
                 m_knownHas |= m_knownChangedTerrainHeight;
             }
-- 
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