From 2ac6fb9ae955d012edeeadf1259eb323871cf29c Mon Sep 17 00:00:00 2001
From: UbitUmarov <ajlduarte@sapo.pt>
Date: Thu, 3 Jan 2019 23:11:39 +0000
Subject: [PATCH] allow landing under lower hight skyboxes

---
 OpenSim/Region/Framework/Scenes/Scene.cs      | 10 ----------
 .../Region/Framework/Scenes/ScenePresence.cs  | 20 +++++++++++--------
 2 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index ed9804686a..252ae21d44 100755
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -4667,16 +4667,6 @@ Label_GroupsDone:
             return false;
         }
 
-//        public bool IncomingCloseAgent(UUID agentID)
-//        {
-//            return IncomingCloseAgent(agentID, false);
-//        }
-
-//        public bool IncomingCloseChildAgent(UUID agentID)
-//        {
-//            return IncomingCloseAgent(agentID, true);
-//        }
-
         /// <summary>
         /// Tell a single client to prepare to close.
         /// </summary>
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 3b78f2ddb4..fd8c6fc9dd 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -1251,8 +1251,9 @@ namespace OpenSim.Region.Framework.Scenes
         /// </remarks>
 
         // constants for physics position search
-        const float PhysSearchHeight = 600f;
-        const float PhysMinSkipGap = 50f;
+        const float PhysSearchHeight = 300f;
+        const float PhysMinSkipGap = 20f;
+        const float PhysSkipGapDelta = 30f;
         const int PhysNumberCollisions = 30;
 
         // only in use as part of completemovement
@@ -1398,11 +1399,13 @@ namespace OpenSim.Region.Framework.Scenes
 
                     List<ContactResult> physresults =
                             (List<ContactResult>)m_scene.RayCastFiltered(RayStart, direction, dist, physcount, rayfilter);
-                    if (physresults != null && physresults.Count > 0)
+                    while (physresults != null && physresults.Count > 0)
                     {
                         float dest = physresults[0].Pos.Z;
+                        if (dest - groundHeight > PhysMinSkipGap + PhysSkipGapDelta)
+                            break;
 
-                        if(physresults.Count > 1)
+                        if (physresults.Count > 1)
                         {
                             physresults.Sort(delegate(ContactResult a, ContactResult b)
                             {
@@ -1420,7 +1423,7 @@ namespace OpenSim.Region.Framework.Scenes
                                 if(curd >= nextd)
                                 {
                                     sel = i;
-                                    if(curd >= maxDepth)
+                                    if(curd >= maxDepth || curd >= nextd + PhysSkipGapDelta)
                                         break;
                                 }
                                 nextd = curd + PhysMinSkipGap;
@@ -1428,9 +1431,10 @@ namespace OpenSim.Region.Framework.Scenes
                             dest = physresults[sel].Pos.Z;
                         }
 
-                        dest += localAVHalfHeight;
-                        if(dest > pos.Z)
-                            pos.Z = dest;
+                    dest += localAVHalfHeight;
+                    if(dest > pos.Z)
+                        pos.Z = dest;
+                    break;
                     }
                 }