4 files changed, 44 insertions, 7 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
index 542f732..3671fc2 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) Contributors, http://opensimulator.org/
  * See CONTRIBUTORS.TXT for a full list of copyright holders.
  *
@@ -649,12 +649,12 @@ public sealed class BSCharacter : BSPhysObject
         OMV.Vector3 newScale;
 
         // Bullet's capsule total height is the "passed height + radius * 2";
-        // The base capsule is 1 diameter and 2 height (passed radius=0.5, passed height = 1)
+        // The base capsule is 1 unit in diameter and 2 units in height (passed radius=0.5, passed height = 1)
         // The number we pass in for 'scaling' is the multiplier to get that base
         //     shape to be the size desired.
         // So, when creating the scale for the avatar height, we take the passed height
         //     (size.Z) and remove the caps.
-        // Another oddity of the Bullet capsule implementation is that it presumes the Y
+        // An oddity of the Bullet capsule implementation is that it presumes the Y
         //     dimension is the radius of the capsule. Even though some of the code allows
         //     for a asymmetrical capsule, other parts of the code presume it is cylindrical.
 
@@ -662,8 +662,27 @@ public sealed class BSCharacter : BSPhysObject
         newScale.X = size.X / 2f;
         newScale.Y = size.Y / 2f;
 
+        float heightAdjust = BSParam.AvatarHeightMidFudge;
+        if (BSParam.AvatarHeightLowFudge != 0f || BSParam.AvatarHeightHighFudge != 0f)
+        {
+            // An avatar is between 1.61 and 2.12 meters. Midpoint is 1.87m.
+            // The "times 4" relies on the fact that the difference from the midpoint to the extremes is exactly 0.25
+            float midHeightOffset = size.Z - 1.87f;
+            if (midHeightOffset < 0f)
+            {
+                // Small avatar. Add the adjustment based on the distance from midheight
+                heightAdjust += -1f * midHeightOffset * 4f * BSParam.AvatarHeightLowFudge;
+            }
+            else
+            {
+                // Large avatar. Add the adjustment based on the distance from midheight
+                heightAdjust += midHeightOffset * 4f * BSParam.AvatarHeightHighFudge;
+            }
+        }
         // The total scale height is the central cylindar plus the caps on the two ends.
-        newScale.Z = (size.Z + (Math.Min(size.X, size.Y) * 2)) / 2f;
+        newScale.Z = (size.Z + (Math.Min(size.X, size.Y) * 2) + heightAdjust) / 2f;
+        // m_log.DebugFormat("{0} ComputeAvatarScale: size={1},adj={2},scale={3}", LogHeader, size, heightAdjust, newScale);
+
         // If smaller than the endcaps, just fake like we're almost that small
         if (newScale.Z < 0)
             newScale.Z = 0.1f;
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
index 3ca7e16..d33292f 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
@@ -90,7 +90,7 @@ public static class BSParam
     public static bool ShouldUseBulletHACD { get; set; }
     public static bool ShouldUseSingleConvexHullForPrims { get; set; }
 
-    public static float TerrainImplementation { get; private set; }
+    public static float TerrainImplementation { get; set; }
     public static int TerrainMeshMagnification { get; private set; }
     public static float TerrainFriction { get; private set; }
     public static float TerrainHitFraction { get; private set; }
@@ -125,6 +125,9 @@ public static class BSParam
     public static float AvatarCapsuleWidth { get; private set; }
     public static float AvatarCapsuleDepth { get; private set; }
     public static float AvatarCapsuleHeight { get; private set; }
+    public static float AvatarHeightLowFudge { get; private set; }
+    public static float AvatarHeightMidFudge { get; private set; }
+    public static float AvatarHeightHighFudge { get; private set; }
         public static float AvatarContactProcessingThreshold { get; private set; }
         public static float AvatarBelowGroundUpCorrectionMeters { get; private set; }
         public static float AvatarStepHeight { get; private set; }
@@ -539,6 +542,12 @@ public static class BSParam
             0.45f ),
         new ParameterDefn<float>("AvatarCapsuleHeight", "Default height of space around avatar",
             1.5f ),
+        new ParameterDefn<float>("AvatarHeightLowFudge", "A fudge factor to make small avatars stand on the ground",
+            -0.2f ),
+        new ParameterDefn<float>("AvatarHeightMidFudge", "A fudge distance to adjust average sized avatars to be standing on ground",
+            0.1f ),
+        new ParameterDefn<float>("AvatarHeightHighFudge", "A fudge factor to make tall avatars stand on the ground",
+            0.1f ),
             new ParameterDefn<float>("AvatarContactProcessingThreshold", "Distance from capsule to check for collisions",
             0.1f ),
             new ParameterDefn<float>("AvatarBelowGroundUpCorrectionMeters", "Meters to move avatar up if it seems to be below ground",
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
index a4a8794..3f407ce 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSScene.cs
@@ -318,8 +318,12 @@ public sealed class BSScene : PhysicsScene, IPhysicsParameters
                 ret = new BSAPIXNA(engineName, this);
                 // Disable some features that are not implemented in BulletXNA
                 m_log.InfoFormat("{0} Disabling some physics features not implemented by BulletXNA", LogHeader);
+                m_log.InfoFormat("{0}    Disabling ShouldUseBulletHACD", LogHeader);
                 BSParam.ShouldUseBulletHACD = false;
+                m_log.InfoFormat("{0}    Disabling ShouldUseSingleConvexHullForPrims", LogHeader);
                 BSParam.ShouldUseSingleConvexHullForPrims = false;
+                m_log.InfoFormat("{0}    Setting terrain implimentation to Heightmap", LogHeader);
+                BSParam.TerrainImplementation = (float)BSTerrainPhys.TerrainImplementation.Heightmap;
                 break;
         }
 
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSShapes.cs b/OpenSim/Region/Physics/BulletSPlugin/BSShapes.cs
index 262d734..72d039b 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSShapes.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSShapes.cs
@@ -283,8 +283,13 @@ public class BSShapeNative : BSShape
     public override BSShape GetReference(BSScene pPhysicsScene, BSPhysObject pPrim)
     {
         // Native shapes are not shared so we return a new shape.
-        return new BSShapeNative(CreatePhysicalNativeShape(pPhysicsScene, pPrim,
-                                    physShapeInfo.shapeType, (FixedShapeKey)physShapeInfo.shapeKey) );
+        BSShape ret = null;
+        lock (physShapeInfo)
+        {
+            ret = new BSShapeNative(CreatePhysicalNativeShape(pPhysicsScene, pPrim,
+                                        physShapeInfo.shapeType, (FixedShapeKey)physShapeInfo.shapeKey));
+        }
+        return ret;
     }
 
     // Make this reference to the physical shape go away since native shapes are not shared.