3 files changed, 39 insertions, 21 deletions

diff --git a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
index 6d1f41d..8397eb4 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODECharacter.cs
@@ -115,6 +115,11 @@ namespace OpenSim.Region.Physics.OdePlugin
         private float m_tainted_CAPSULE_LENGTH; // set when the capsule length changes.
 
         /// <summary>
+        /// Base movement for calculating tilt.
+        /// </summary>
+        private float m_tiltBaseMovement = (float)Math.Sqrt(2);
+
+        /// <summary>
         /// Used to introduce a fixed tilt because a straight-up capsule falls through terrain, probably a bug in terrain collider
         /// </summary>
         private float m_tiltMagnitudeWhenProjectedOnXYPlane = 0.1131371f;
@@ -524,14 +529,14 @@ namespace OpenSim.Region.Physics.OdePlugin
                 if (movementVector.Y > 0)
                 {
                     // northeast
-                    movementVector.X = (float)Math.Sqrt(2.0);
-                    movementVector.Y = (float)Math.Sqrt(2.0);
+                    movementVector.X = m_tiltBaseMovement;
+                    movementVector.Y = m_tiltBaseMovement;
                 }
                 else
                 {
                     // southeast
-                    movementVector.X = (float)Math.Sqrt(2.0);
-                    movementVector.Y = -(float)Math.Sqrt(2.0);
+                    movementVector.X = m_tiltBaseMovement;
+                    movementVector.Y = -m_tiltBaseMovement;
                 }
             }
             else
@@ -540,14 +545,14 @@ namespace OpenSim.Region.Physics.OdePlugin
                 if (movementVector.Y > 0)
                 {
                     // northwest
-                    movementVector.X = -(float)Math.Sqrt(2.0);
-                    movementVector.Y = (float)Math.Sqrt(2.0);
+                    movementVector.X = -m_tiltBaseMovement;
+                    movementVector.Y = m_tiltBaseMovement;
                 }
                 else
                 {
                     // southwest
-                    movementVector.X = -(float)Math.Sqrt(2.0);
-                    movementVector.Y = -(float)Math.Sqrt(2.0);
+                    movementVector.X = -m_tiltBaseMovement;
+                    movementVector.Y = -m_tiltBaseMovement;
                 }
             }
 
diff --git a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
index 97890ee..1f79cd8 100644
--- a/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
+++ b/OpenSim/Region/Physics/OdePlugin/ODEPrim.cs
@@ -842,17 +842,23 @@ namespace OpenSim.Region.Physics.OdePlugin
             mesh.getIndexListAsPtrToIntArray(out indices, out triStride, out indexCount); // Also fixed, needs release after usage
 
             mesh.releaseSourceMeshData(); // free up the original mesh data to save memory
-            if (m_MeshToTriMeshMap.ContainsKey(mesh))
-            {
-                _triMeshData = m_MeshToTriMeshMap[mesh];
-            }
-            else
-            {
-                _triMeshData = d.GeomTriMeshDataCreate();
 
-                d.GeomTriMeshDataBuildSimple(_triMeshData, vertices, vertexStride, vertexCount, indices, indexCount, triStride);
-                d.GeomTriMeshDataPreprocess(_triMeshData);
-                m_MeshToTriMeshMap[mesh] = _triMeshData;
+            // We must lock here since m_MeshToTriMeshMap is static and multiple scene threads may call this method at
+            // the same time.
+            lock (m_MeshToTriMeshMap)
+            {
+                if (m_MeshToTriMeshMap.ContainsKey(mesh))
+                {
+                    _triMeshData = m_MeshToTriMeshMap[mesh];
+                }
+                else
+                {
+                    _triMeshData = d.GeomTriMeshDataCreate();
+    
+                    d.GeomTriMeshDataBuildSimple(_triMeshData, vertices, vertexStride, vertexCount, indices, indexCount, triStride);
+                    d.GeomTriMeshDataPreprocess(_triMeshData);
+                    m_MeshToTriMeshMap[mesh] = _triMeshData;
+                }
             }
 
 //            _parent_scene.waitForSpaceUnlock(m_targetSpace);
diff --git a/OpenSim/Region/Physics/OdePlugin/OdeScene.cs b/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
index 598530c..842ff91 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdeScene.cs
@@ -181,8 +181,15 @@ namespace OpenSim.Region.Physics.OdePlugin
         private float avPIDP = 1400f;
         private float avCapRadius = 0.37f;
         private float avStandupTensor = 2000000f;
-        private bool avCapsuleTilted = true; // true = old compatibility mode with leaning capsule; false = new corrected mode
-        public bool IsAvCapsuleTilted { get { return avCapsuleTilted; } set { avCapsuleTilted = value; } }
+
+        /// <summary>
+        /// true = old compatibility mode with leaning capsule; false = new corrected mode
+        /// </summary>
+        /// <remarks>
+        /// Even when set to false, the capsule still tilts but this is done in a different way.
+        /// </remarks>
+        public bool IsAvCapsuleTilted { get; private set; }
+
         private float avDensity = 80f;
 //        private float avHeightFudgeFactor = 0.52f;
         private float avMovementDivisorWalk = 1.3f;
@@ -501,7 +508,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                     avMovementDivisorWalk = physicsconfig.GetFloat("av_movement_divisor_walk", 1.3f);
                     avMovementDivisorRun = physicsconfig.GetFloat("av_movement_divisor_run", 0.8f);
                     avCapRadius = physicsconfig.GetFloat("av_capsule_radius", 0.37f);
-                    avCapsuleTilted = physicsconfig.GetBoolean("av_capsule_tilted", false);
+                    IsAvCapsuleTilted = physicsconfig.GetBoolean("av_capsule_tilted", false);
 
                     contactsPerCollision = physicsconfig.GetInt("contacts_per_collision", 80);