Merge of ubitworkvarnew with opensim/master as of 20150905.

This integrates the OpenSim refactoring to make physics, etc into modules.
AVN physics hasn't been moved to new location.
Does not compile yet.

Merge branch 'osmaster' into mbworknew1

4 files changed, 1062 insertions, 0 deletions

diff --git a/OpenSim/Region/PhysicsModules/POS/AssemblyInfo.cs b/OpenSim/Region/PhysicsModules/POS/AssemblyInfo.cs
new file mode 100644
index 0000000..e3a3e35
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/POS/AssemblyInfo.cs
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System.Reflection;
+using System.Runtime.InteropServices;
+using Mono.Addins;
+
+// Information about this assembly is defined by the following
+// attributes.
+//
+// change them to the information which is associated with the assembly
+// you compile.
+
+[assembly : AssemblyTitle("POSPlugin")]
+[assembly : AssemblyDescription("")]
+[assembly : AssemblyConfiguration("")]
+[assembly : AssemblyCompany("http://opensimulator.org")]
+[assembly : AssemblyProduct("POSPlugin")]
+[assembly : AssemblyCopyright("Copyright (c) OpenSimulator.org Developers")]
+[assembly : AssemblyTrademark("")]
+[assembly : AssemblyCulture("")]
+
+// This sets the default COM visibility of types in the assembly to invisible.
+// If you need to expose a type to COM, use [ComVisible(true)] on that type.
+
+[assembly : ComVisible(false)]
+
+// The assembly version has following format :
+//
+// Major.Minor.Build.Revision
+//
+// You can specify all values by your own or you can build default build and revision
+// numbers with the '*' character (the default):
+
+[assembly : AssemblyVersion("0.8.2.*")]
+
+[assembly: Addin("OpenSim.Region.PhysicsModule.POS", OpenSim.VersionInfo.VersionNumber)]
+[assembly: AddinDependency("OpenSim.Region.Framework", OpenSim.VersionInfo.VersionNumber)]
diff --git a/OpenSim/Region/PhysicsModules/POS/POSCharacter.cs b/OpenSim/Region/PhysicsModules/POS/POSCharacter.cs
new file mode 100644
index 0000000..32469d9
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/POS/POSCharacter.cs
@@ -0,0 +1,341 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using Nini.Config;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+
+namespace OpenSim.Region.PhysicsModule.POS
+{
+    public class POSCharacter : PhysicsActor
+    {
+        private Vector3 _position;
+        public Vector3 _velocity;
+        public Vector3 _target_velocity = Vector3.Zero;
+        public Vector3 _size = Vector3.Zero;
+        private Vector3 _acceleration;
+        private Vector3 m_rotationalVelocity = Vector3.Zero;
+        private bool flying;
+        private bool isColliding;
+
+        public POSCharacter()
+        {
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int) ActorTypes.Agent; }
+            set { return; }
+        }
+
+        public override Vector3 RotationalVelocity
+        {
+            get { return m_rotationalVelocity; }
+            set { m_rotationalVelocity = value; }
+        }
+
+        public override bool SetAlwaysRun
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override uint LocalID
+        {
+            set { return; }
+        }
+
+        public override bool Grabbed
+        {
+            set { return; }
+        }
+
+        public override bool Selected
+        {
+            set { return; }
+        }
+
+        public override float Buoyancy
+        {
+            get { return 0f; }
+            set { return; }
+        }
+
+        public override bool FloatOnWater
+        {
+            set { return; }
+        }
+
+        public override bool IsPhysical
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool ThrottleUpdates
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool Flying
+        {
+            get { return flying; }
+            set { flying = value; }
+        }
+
+        public override bool IsColliding
+        {
+            get { return isColliding; }
+            set { isColliding = value; }
+        }
+
+        public override bool CollidingGround
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool CollidingObj
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool Stopped
+        {
+            get { return false; }
+        }
+
+        public override Vector3 Position
+        {
+            get { return _position; }
+            set { _position = value; }
+        }
+
+        public override Vector3 Size
+        {
+            get { return _size; }
+            set
+            {
+                _size = value;
+                _size.Z = _size.Z / 2.0f;
+            }
+        }
+
+        public override float Mass
+        {
+            get { return 0f; }
+        }
+
+        public override Vector3 Force
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override int VehicleType
+        {
+            get { return 0; }
+            set { return; }
+        }
+
+        public override void VehicleFloatParam(int param, float value)
+        {
+
+        }
+
+        public override void VehicleVectorParam(int param, Vector3 value)
+        {
+
+        }
+
+        public override void VehicleRotationParam(int param, Quaternion rotation)
+        {
+
+        }
+
+        public override void VehicleFlags(int param, bool remove) { }
+
+        public override void SetVolumeDetect(int param)
+        {
+
+        }
+
+        public override Vector3 CenterOfMass
+        {
+            get { return Vector3.Zero; }
+        }
+
+        public override Vector3 GeometricCenter
+        {
+            get { return Vector3.Zero; }
+        }
+
+        public override PrimitiveBaseShape Shape
+        {
+            set { return; }
+        }
+
+        public override Vector3 Velocity
+        {
+            get { return _velocity; }
+            set { _target_velocity = value; }
+        }
+
+        public override Vector3 Torque
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override float CollisionScore
+        {
+            get { return 0f; }
+            set { }
+        }
+
+        public override Quaternion Orientation
+        {
+            get { return Quaternion.Identity; }
+            set { }
+        }
+
+        public override Vector3 Acceleration
+        {
+            get { return _acceleration; }
+            set { _acceleration = value; }
+        }
+
+        public override bool Kinematic
+        {
+            get { return true; }
+            set { }
+        }
+
+        public override void link(PhysicsActor obj)
+        {
+        }
+
+        public override void delink()
+        {
+        }
+
+        public override void LockAngularMotion(Vector3 axis)
+        {
+        }
+
+        public override void AddForce(Vector3 force, bool pushforce)
+        {
+        }
+
+        public override void AddAngularForce(Vector3 force, bool pushforce)
+        {
+        }
+
+        public override void SetMomentum(Vector3 momentum)
+        {
+        }
+
+        public override void CrossingFailure()
+        {
+        }
+
+        public override Vector3 PIDTarget
+        {
+            set { return; }
+        }
+
+        public override bool PIDActive 
+        { 
+            get { return false; }
+            set { return; } 
+        }
+
+        public override float PIDTau
+        {
+            set { return; }
+        }
+
+        public override float PIDHoverHeight
+        {
+            set { return; }
+        }
+
+        public override bool PIDHoverActive
+        {
+            set { return; }
+        }
+
+        public override PIDHoverType PIDHoverType
+        {
+            set { return; }
+        }
+
+        public override float PIDHoverTau
+        {
+            set { return; }
+        }
+        
+        public override Quaternion APIDTarget
+        {
+            set { return; }
+        }
+
+        public override bool APIDActive
+        {
+            set { return; }
+        }
+
+        public override float APIDStrength
+        {
+            set { return; }
+        }
+
+        public override float APIDDamping
+        {
+            set { return; }
+        }
+
+
+        public override void SubscribeEvents(int ms)
+        {
+        }
+
+        public override void UnSubscribeEvents()
+        {
+        }
+
+        public override bool SubscribedEvents()
+        {
+            return false;
+        }
+    }
+}
diff --git a/OpenSim/Region/PhysicsModules/POS/POSPrim.cs b/OpenSim/Region/PhysicsModules/POS/POSPrim.cs
new file mode 100644
index 0000000..c190fab
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/POS/POSPrim.cs
@@ -0,0 +1,336 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using Nini.Config;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+
+namespace OpenSim.Region.PhysicsModule.POS
+{
+    public class POSPrim : PhysicsActor
+    {
+        private Vector3 _position;
+        private Vector3 _velocity;
+        private Vector3 _acceleration;
+        private Vector3 _size;
+        private Vector3 m_rotationalVelocity = Vector3.Zero;
+        private Quaternion _orientation;
+        private bool iscolliding;
+
+        public POSPrim()
+        {
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int) ActorTypes.Prim; }
+            set { return; }
+        }
+
+        public override Vector3 RotationalVelocity
+        {
+            get { return m_rotationalVelocity; }
+            set { m_rotationalVelocity = value; }
+        }
+
+        public override bool IsPhysical
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool ThrottleUpdates
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool IsColliding
+        {
+            get { return iscolliding; }
+            set { iscolliding = value; }
+        }
+
+        public override bool CollidingGround
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool CollidingObj
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override bool Stopped
+        {
+            get { return false; }
+        }
+
+        public override Vector3 Position
+        {
+            get { return _position; }
+            set { _position = value; }
+        }
+
+        public override Vector3 Size
+        {
+            get { return _size; }
+            set { _size = value; }
+        }
+
+        public override float Mass
+        {
+            get { return 0f; }
+        }
+
+        public override Vector3 Force
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override int VehicleType
+        {
+            get { return 0; }
+            set { return; }
+        }
+
+        public override void VehicleFloatParam(int param, float value)
+        {
+
+        }
+
+        public override void VehicleVectorParam(int param, Vector3 value)
+        {
+
+        }
+
+        public override void VehicleRotationParam(int param, Quaternion rotation)
+        {
+
+        }
+
+        public override void VehicleFlags(int param, bool remove) { }
+
+        public override void SetVolumeDetect(int param)
+        {
+
+        }
+
+        public override Vector3 CenterOfMass
+        {
+            get { return Vector3.Zero; }
+        }
+
+        public override Vector3 GeometricCenter
+        {
+            get { return Vector3.Zero; }
+        }
+
+        public override PrimitiveBaseShape Shape
+        {
+            set { return; }
+        }
+
+        public override float Buoyancy
+        {
+            get { return 0f; }
+            set { return; }
+        }
+
+        public override bool FloatOnWater
+        {
+            set { return; }
+        }
+
+        public override Vector3 Velocity
+        {
+            get { return _velocity; }
+            set { _velocity = value; }
+        }
+
+        public override float CollisionScore
+        {
+            get { return 0f; }
+            set { }
+        }
+
+        public override Quaternion Orientation
+        {
+            get { return _orientation; }
+            set { _orientation = value; }
+        }
+
+        public override Vector3 Acceleration
+        {
+            get { return _acceleration; }
+            set { _acceleration = value; }
+        }
+
+        public override bool Kinematic
+        {
+            get { return true; }
+            set { }
+        }
+
+        public override void AddForce(Vector3 force, bool pushforce)
+        {
+        }
+
+        public override void AddAngularForce(Vector3 force, bool pushforce)
+        {
+        }
+
+        public override Vector3 Torque
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override void SetMomentum(Vector3 momentum)
+        {
+        }
+
+        public override bool Flying
+        {
+            get { return false; }
+            set { }
+        }
+
+        public override bool SetAlwaysRun
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override uint LocalID
+        {
+            set { return; }
+        }
+
+        public override bool Grabbed
+        {
+            set { return; }
+        }
+
+        public override void link(PhysicsActor obj)
+        {
+        }
+
+        public override void delink()
+        {
+        }
+
+        public override void LockAngularMotion(Vector3 axis)
+        {
+        }
+
+        public override bool Selected
+        {
+            set { return; }
+        }
+
+        public override void CrossingFailure()
+        {
+        }
+
+        public override Vector3 PIDTarget
+        {
+            set { return; }
+        }
+
+        public override bool PIDActive
+        {
+            get { return false; }
+            set { return; }
+        }
+
+        public override float PIDTau
+        {
+            set { return; }
+        }
+
+        public override float PIDHoverHeight
+        {
+            set { return; }
+        }
+
+        public override bool PIDHoverActive
+        {
+            set { return; }
+        }
+
+        public override PIDHoverType PIDHoverType
+        {
+            set { return; }
+        }
+
+        public override float PIDHoverTau
+        {
+            set { return; }
+        }
+
+        public override Quaternion APIDTarget
+        {
+            set { return; }
+        }
+
+        public override bool APIDActive
+        {
+            set { return; }
+        }
+
+        public override float APIDStrength
+        {
+            set { return; }
+        }
+
+        public override float APIDDamping
+        {
+            set { return; }
+        }
+
+
+        public override void SubscribeEvents(int ms)
+        {
+        }
+
+        public override void UnSubscribeEvents()
+        {
+        }
+
+        public override bool SubscribedEvents()
+        {
+            return false;
+        }
+    }
+}
diff --git a/OpenSim/Region/PhysicsModules/POS/POSScene.cs b/OpenSim/Region/PhysicsModules/POS/POSScene.cs
new file mode 100644
index 0000000..e6bcbf2
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/POS/POSScene.cs
@@ -0,0 +1,323 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using Nini.Config;
+using OpenMetaverse;
+using Mono.Addins;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.Framework.Interfaces;
+
+namespace OpenSim.Region.PhysicsModule.POS
+{
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "POSPhysicsScene")]
+    public class POSScene : PhysicsScene, INonSharedRegionModule
+    {
+        private List<POSCharacter> _characters = new List<POSCharacter>();
+        private List<POSPrim> _prims = new List<POSPrim>();
+        private float[] _heightMap;
+        private const float gravity = -9.8f;
+
+        private bool m_Enabled = false;
+        //protected internal string sceneIdentifier;
+
+        #region INonSharedRegionModule
+        public string Name
+        {
+            get { return "POS"; }
+        }
+
+        public Type ReplaceableInterface
+        {
+            get { return null; }
+        }
+
+        public void Initialise(IConfigSource source)
+        {
+            // TODO: Move this out of Startup
+            IConfig config = source.Configs["Startup"];
+            if (config != null)
+            {
+                string physics = config.GetString("physics", string.Empty);
+                if (physics == Name)
+                    m_Enabled = true;
+            }
+
+        }
+
+        public void Close()
+        {
+        }
+
+        public void AddRegion(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+
+            EngineType = Name;
+            PhysicsSceneName = EngineType + "/" + scene.RegionInfo.RegionName;
+
+            scene.RegisterModuleInterface<PhysicsScene>(this);
+            base.Initialise(scene.PhysicsRequestAsset,
+                (scene.Heightmap != null ? scene.Heightmap.GetFloatsSerialised() : new float[Constants.RegionSize * Constants.RegionSize]),
+                (float)scene.RegionInfo.RegionSettings.WaterHeight);
+
+        }
+
+        public void RemoveRegion(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+        }
+
+        public void RegionLoaded(Scene scene)
+        {
+            if (!m_Enabled)
+                return;
+        }
+        #endregion
+
+        public override void Dispose()
+        {
+        }
+
+        public override PhysicsActor AddAvatar(
+            string avName, Vector3 position, Vector3 velocity, Vector3 size, bool isFlying)
+        {
+            POSCharacter act = new POSCharacter();
+            act.Position = position;
+            act.Flying = isFlying;
+            _characters.Add(act);
+            return act;
+        }
+
+        public override void RemovePrim(PhysicsActor prim)
+        {
+            POSPrim p = (POSPrim) prim;
+            if (_prims.Contains(p))
+            {
+                _prims.Remove(p);
+            }
+        }
+
+        public override void RemoveAvatar(PhysicsActor character)
+        {
+            POSCharacter act = (POSCharacter) character;
+            if (_characters.Contains(act))
+            {
+                _characters.Remove(act);
+            }
+        }
+
+/*
+        public override PhysicsActor AddPrim(Vector3 position, Vector3 size, Quaternion rotation)
+        {
+            return null;
+        }
+*/
+
+        public override PhysicsActor AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
+                                                  Vector3 size, Quaternion rotation, bool isPhysical, uint localid)
+        {
+            POSPrim prim = new POSPrim();
+            prim.Position = position;
+            prim.Orientation = rotation;
+            prim.Size = size;
+            _prims.Add(prim);
+            return prim;
+        }
+
+        private bool isColliding(POSCharacter c, POSPrim p)
+        {
+            Vector3 rotatedPos = new Vector3(c.Position.X - p.Position.X, c.Position.Y - p.Position.Y,
+                                             c.Position.Z - p.Position.Z) * Quaternion.Inverse(p.Orientation);
+            Vector3 avatarSize = new Vector3(c.Size.X, c.Size.Y, c.Size.Z) * Quaternion.Inverse(p.Orientation);
+
+            return (Math.Abs(rotatedPos.X) < (p.Size.X*0.5 + Math.Abs(avatarSize.X)) &&
+                    Math.Abs(rotatedPos.Y) < (p.Size.Y*0.5 + Math.Abs(avatarSize.Y)) &&
+                    Math.Abs(rotatedPos.Z) < (p.Size.Z*0.5 + Math.Abs(avatarSize.Z)));
+        }
+
+        private bool isCollidingWithPrim(POSCharacter c)
+        {
+            foreach (POSPrim p in _prims)
+            {
+                if (isColliding(c, p))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public override void AddPhysicsActorTaint(PhysicsActor prim)
+        {
+        }
+
+        public override float Simulate(float timeStep)
+        {
+            float fps = 0;
+            for (int i = 0; i < _characters.Count; ++i)
+            {
+                fps++;
+                POSCharacter character = _characters[i];
+
+                float oldposX = character.Position.X;
+                float oldposY = character.Position.Y;
+                float oldposZ = character.Position.Z;
+
+                if (!character.Flying)
+                {
+                    character._target_velocity.Z += gravity * timeStep;
+                }
+
+                Vector3 characterPosition = character.Position;
+
+                characterPosition.X += character._target_velocity.X * timeStep;
+                characterPosition.Y += character._target_velocity.Y * timeStep;
+
+                characterPosition.X = Util.Clamp(character.Position.X, 0.01f, Constants.RegionSize - 0.01f);
+                characterPosition.Y = Util.Clamp(character.Position.Y, 0.01f, Constants.RegionSize - 0.01f);
+
+                bool forcedZ = false;
+
+                float terrainheight = _heightMap[(int)character.Position.Y * Constants.RegionSize + (int)character.Position.X];
+                if (character.Position.Z + (character._target_velocity.Z * timeStep) < terrainheight + 2)
+                {
+                    characterPosition.Z = terrainheight + character.Size.Z;
+                    forcedZ = true;
+                }
+                else
+                {
+                    characterPosition.Z += character._target_velocity.Z*timeStep;
+                }
+
+                /// this is it -- the magic you've all been waiting for!  Ladies and gentlemen --
+                /// Completely Bogus Collision Detection!!!
+                /// better known as the CBCD algorithm
+
+                if (isCollidingWithPrim(character))
+                {
+                    characterPosition.Z = oldposZ; //  first try Z axis
+                    if (isCollidingWithPrim(character))
+                    {
+                        characterPosition.Z = oldposZ + character.Size.Z / 4.4f; // try harder
+                        if (isCollidingWithPrim(character))
+                        {
+                            characterPosition.Z = oldposZ + character.Size.Z / 2.2f; // try very hard
+                            if (isCollidingWithPrim(character))
+                            {
+                                characterPosition.X = oldposX;
+                                characterPosition.Y = oldposY;
+                                characterPosition.Z = oldposZ;
+
+                                characterPosition.X += character._target_velocity.X * timeStep;
+                                if (isCollidingWithPrim(character))
+                                {
+                                    characterPosition.X = oldposX;
+                                }
+
+                                characterPosition.Y += character._target_velocity.Y * timeStep;
+                                if (isCollidingWithPrim(character))
+                                {
+                                    characterPosition.Y = oldposY;
+                                }
+                            }
+                            else
+                            {
+                                forcedZ = true;
+                            }
+                        }
+                        else
+                        {
+                            forcedZ = true;
+                        }
+                    }
+                    else
+                    {
+                        forcedZ = true;
+                    }
+                }
+
+                characterPosition.X = Util.Clamp(character.Position.X, 0.01f, Constants.RegionSize - 0.01f);
+                characterPosition.Y = Util.Clamp(character.Position.Y, 0.01f, Constants.RegionSize - 0.01f);
+
+                character.Position = characterPosition;
+
+                character._velocity.X = (character.Position.X - oldposX)/timeStep;
+                character._velocity.Y = (character.Position.Y - oldposY)/timeStep;
+
+                if (forcedZ)
+                {
+                    character._velocity.Z = 0;
+                    character._target_velocity.Z = 0;
+                    ((PhysicsActor)character).IsColliding = true;
+                    character.RequestPhysicsterseUpdate();
+                }
+                else
+                {
+                    ((PhysicsActor)character).IsColliding = false;
+                    character._velocity.Z = (character.Position.Z - oldposZ)/timeStep;
+                }
+            }
+            return 1.0f;
+        }
+
+        public override void GetResults()
+        {
+        }
+
+        public override bool IsThreaded
+        {
+            // for now we won't be multithreaded
+            get { return (false); }
+        }
+
+        public override void SetTerrain(float[] heightMap)
+        {
+            _heightMap = heightMap;
+        }
+
+        public override void DeleteTerrain()
+        {
+        }
+
+        public override void SetWaterLevel(float baseheight)
+        {
+        }
+
+        public override Dictionary<uint, float> GetTopColliders()
+        {
+            Dictionary<uint, float> returncolliders = new Dictionary<uint, float>();
+            return returncolliders;
+        }
+    }
+}