From f4498983aa2f498321fbc508a2f41b390914bee7 Mon Sep 17 00:00:00 2001
From: Melanie Thielker <melanie@t-data.com>
Date: Wed, 8 Jul 2009 10:22:51 +0000
Subject: [PATCH] Prevent scripts from moving prims underground

---
 .../Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index a90d20c294..9f02880808 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -1855,8 +1855,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             {
                 targetPos = currentPos + m_ScriptDistanceFactor * 10.0f * llVecNorm(targetPos - currentPos);
             }
-            
 
+            float ground = World.GetGroundHeight((float)targetPos.x, (float)targetPos.y);
+            if (targetPos.z < ground)
+                targetPos.z = ground;
+            
             if (part.ParentGroup == null)
             {
                 part.UpdateOffSet(new Vector3((float)targetPos.x, (float)targetPos.y, (float)targetPos.z));