2 files changed, 142 insertions, 30 deletions

diff --git a/OpenSim/Region/Physics/UbitMeshing/Mesh.cs b/OpenSim/Region/Physics/UbitMeshing/Mesh.cs
index c715642..0727802 100644
--- a/OpenSim/Region/Physics/UbitMeshing/Mesh.cs
+++ b/OpenSim/Region/Physics/UbitMeshing/Mesh.cs
@@ -46,8 +46,8 @@ namespace OpenSim.Region.Physics.Meshing
         IntPtr m_indicesPtr = IntPtr.Zero;
         int m_indexCount = 0;
         public float[] m_normals;
-        Vector3 _centroid;
-        int _centroidDiv;
+        Vector3 m_centroid;
+        int m_centroidDiv;       
 
         private class vertexcomp : IEqualityComparer<Vertex>
         {
@@ -65,7 +65,6 @@ namespace OpenSim.Region.Physics.Meshing
                 int c = v.Z.GetHashCode();
                 return (a << 16) ^ (b << 8) ^ c;
             }
-
         }
 
         public Mesh()
@@ -74,8 +73,18 @@ namespace OpenSim.Region.Physics.Meshing
 
             m_vertices = new Dictionary<Vertex, int>(vcomp);
             m_triangles = new List<Triangle>();
-            _centroid = Vector3.Zero;
-            _centroidDiv = 0;
+            m_centroid = Vector3.Zero;
+            m_centroidDiv = 0;
+        }
+
+        public int RefCount { get; set; }
+
+        public ulong Key { get; set; }
+
+        public void Scale(Vector3 scale)
+        {
+
+
         }
 
         public Mesh Clone()
@@ -86,8 +95,8 @@ namespace OpenSim.Region.Physics.Meshing
             {
                 result.Add(new Triangle(t.v1.Clone(), t.v2.Clone(), t.v3.Clone()));
             }
-            result._centroid = _centroid;
-            result._centroidDiv = _centroidDiv;
+            result.m_centroid = m_centroid;
+            result.m_centroidDiv = m_centroidDiv;
             return result;
         }
 
@@ -109,41 +118,41 @@ namespace OpenSim.Region.Physics.Meshing
 
             if (m_vertices.Count == 0)
             {
-                _centroidDiv = 0;
-                _centroid = Vector3.Zero;
+                m_centroidDiv = 0;
+                m_centroid = Vector3.Zero;
             }
 
             if (!m_vertices.ContainsKey(triangle.v1))
             {
                 m_vertices[triangle.v1] = m_vertices.Count;
-                _centroid.X += triangle.v1.X;
-                _centroid.Y += triangle.v1.Y;
-                _centroid.Z += triangle.v1.Z;
-                _centroidDiv++;
+                m_centroid.X += triangle.v1.X;
+                m_centroid.Y += triangle.v1.Y;
+                m_centroid.Z += triangle.v1.Z;
+                m_centroidDiv++;
             }
             if (!m_vertices.ContainsKey(triangle.v2))
             {
                 m_vertices[triangle.v2] = m_vertices.Count;
-                _centroid.X += triangle.v2.X;
-                _centroid.Y += triangle.v2.Y;
-                _centroid.Z += triangle.v2.Z;
-                _centroidDiv++;
+                m_centroid.X += triangle.v2.X;
+                m_centroid.Y += triangle.v2.Y;
+                m_centroid.Z += triangle.v2.Z;
+                m_centroidDiv++;
             }
             if (!m_vertices.ContainsKey(triangle.v3))
             {
                 m_vertices[triangle.v3] = m_vertices.Count;
-                _centroid.X += triangle.v3.X;
-                _centroid.Y += triangle.v3.Y;
-                _centroid.Z += triangle.v3.Z;
-                _centroidDiv++;
+                m_centroid.X += triangle.v3.X;
+                m_centroid.Y += triangle.v3.Y;
+                m_centroid.Z += triangle.v3.Z;
+                m_centroidDiv++;
             }
             m_triangles.Add(triangle);
         }
 
         public Vector3 GetCentroid()
         {
-            if (_centroidDiv > 0)
-                return new Vector3(_centroid.X / _centroidDiv, _centroid.Y / _centroidDiv, _centroid.Z / _centroidDiv);
+            if (m_centroidDiv > 0)
+                return new Vector3(m_centroid.X / m_centroidDiv, m_centroid.Y / m_centroidDiv, m_centroid.Z / m_centroidDiv);
             else
                 return Vector3.Zero;
         }
diff --git a/OpenSim/Region/Physics/UbitMeshing/Meshmerizer.cs b/OpenSim/Region/Physics/UbitMeshing/Meshmerizer.cs
index 3b1bdfb..a894e5f 100644
--- a/OpenSim/Region/Physics/UbitMeshing/Meshmerizer.cs
+++ b/OpenSim/Region/Physics/UbitMeshing/Meshmerizer.cs
@@ -83,6 +83,7 @@ namespace OpenSim.Region.Physics.Meshing
         private float minSizeForComplexMesh = 0.2f; // prims with all dimensions smaller than this will have a bounding box mesh
 
         private Dictionary<ulong, Mesh> m_uniqueMeshes = new Dictionary<ulong, Mesh>();
+        private Dictionary<ulong, Mesh> m_uniqueReleasedMeshes = new Dictionary<ulong, Mesh>();
 
         public Meshmerizer(IConfigSource config)
         {
@@ -986,6 +987,8 @@ namespace OpenSim.Region.Physics.Meshing
             return CreateMesh(primName, primShape, size, lod, false,false);
         }
 
+        private static Vector3 m_MeshUnitSize = new Vector3(0.5f, 0.5f, 0.5f);
+
         public IMesh CreateMesh(String primName, PrimitiveBaseShape primShape, Vector3 size, float lod, bool isPhysical, bool convex)
         {
 #if SPAM
@@ -995,17 +998,60 @@ namespace OpenSim.Region.Physics.Meshing
             Mesh mesh = null;
             ulong key = 0;
 
-            // If this mesh has been created already, return it instead of creating another copy
-            // For large regions with 100k+ prims and hundreds of copies of each, this can save a GB or more of memory
-            key = primShape.GetMeshKey(size, lod, convex);
-            if (m_uniqueMeshes.TryGetValue(key, out mesh))
-                return mesh;
-
             if (size.X < 0.01f) size.X = 0.01f;
             if (size.Y < 0.01f) size.Y = 0.01f;
             if (size.Z < 0.01f) size.Z = 0.01f;
 
+            // try to find a identical mesh on meshs in use
+            key = primShape.GetMeshKey(size, lod, convex);
+
+            lock (m_uniqueMeshes)
+            {
+                m_uniqueMeshes.TryGetValue(key, out mesh);
+
+                if (mesh != null)
+                {
+                    mesh.RefCount++;
+                    return mesh;
+                }
+            }
+
+            // try to find a identical mesh on meshs recently released
+            lock (m_uniqueReleasedMeshes)
+            {
+                m_uniqueReleasedMeshes.TryGetValue(key, out mesh);
+                if (mesh != null)
+                {
+                    m_uniqueReleasedMeshes.Remove(key);
+                    lock (m_uniqueMeshes)
+                        m_uniqueMeshes.Add(key, mesh);
+                    mesh.RefCount = 1;
+                    return mesh;
+                }
+            }
+/*
+            Mesh UnitSizeMesh = null;
+            ulong unitsizekey = 0;
+
+            unitsizekey = primShape.GetMeshKey(m_MeshUnitSize, lod, convex);
+
+            lock(m_uniqueMeshes)
+                m_uniqueMeshes.TryGetValue(unitsizekey, out UnitSizeMesh);
+
+            if (UnitSizeMesh !=null)
+            {
+                UnitSizeMesh.RefCount++;
+                mesh = UnitSizeMesh.Clone();
+                mesh.Key = key;
+                mesh.Scale(size);
+                mesh.RefCount++;
+                lock(m_uniqueMeshes)
+                    m_uniqueMeshes.Add(key, mesh);
+                return mesh;
+            }
+*/
             mesh = CreateMeshFromPrimMesher(primName, primShape, size, lod,convex);
+//            mesh.Key = unitsizekey;
 
             if (mesh != null)
             {
@@ -1021,11 +1067,68 @@ namespace OpenSim.Region.Physics.Meshing
 
                 // trim the vertex and triangle lists to free up memory
                 mesh.TrimExcess();
+                mesh.Key = key;
+                mesh.RefCount++;
 
-                m_uniqueMeshes.Add(key, mesh);
+                lock(m_uniqueMeshes)
+                    m_uniqueMeshes.Add(key, mesh);
             }
 
             return mesh;
         }
+
+        public void ReleaseMesh(IMesh imesh)
+        {
+            if (imesh == null)
+                return;
+
+            Mesh mesh = (Mesh)imesh;
+
+            int curRefCount = mesh.RefCount;
+            curRefCount--;
+
+            if (curRefCount > 0)
+            {
+                mesh.RefCount = curRefCount;
+                return;
+            }
+
+            lock (m_uniqueMeshes)
+            {
+                mesh.RefCount = 0;
+                m_uniqueMeshes.Remove(mesh.Key);
+                lock (m_uniqueReleasedMeshes)
+                    m_uniqueReleasedMeshes.Add(mesh.Key, mesh);
+            }
+        }
+
+        public void ExpireReleaseMeshs()
+        {
+            if (m_uniqueMeshes.Count == 0)
+                return;
+
+            List<Mesh> meshstodelete = new List<Mesh>();
+            int refcntr;
+
+            lock (m_uniqueReleasedMeshes)
+            {
+                foreach (Mesh m in m_uniqueReleasedMeshes.Values)
+                {
+                    refcntr = m.RefCount;
+                    refcntr--;
+                    if (refcntr > -6)
+                        m.RefCount = refcntr;
+                    else
+                        meshstodelete.Add(m);
+                }
+
+                foreach (Mesh m in meshstodelete)
+                {
+                    m_uniqueReleasedMeshes.Remove(m.Key);
+                    m.releaseSourceMeshData();
+                    m.releasePinned();
+                }
+            }
+        }
     }
 }