Initial update to OpenSim 0.8.2.1 source code.

4 files changed, 937 insertions, 0 deletions

diff --git a/OpenSim/Region/PhysicsModules/BasicPhysics/AssemblyInfo.cs b/OpenSim/Region/PhysicsModules/BasicPhysics/AssemblyInfo.cs
new file mode 100644
index 0000000..1765ae0
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/BasicPhysics/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("BasicPhysicsModule")]
+[assembly : AssemblyDescription("")]
+[assembly : AssemblyConfiguration("")]
+[assembly : AssemblyCompany("http://opensimulator.org")]
+[assembly : AssemblyProduct("BasicPhysicsModule")]
+[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.BasicPhysics", OpenSim.VersionInfo.VersionNumber)]
+[assembly: AddinDependency("OpenSim.Region.Framework", OpenSim.VersionInfo.VersionNumber)]
diff --git a/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsActor.cs b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsActor.cs
new file mode 100644
index 0000000..e7b30ba
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsActor.cs
@@ -0,0 +1,303 @@
+/*
+ * 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.BasicPhysics
+{
+    public class BasicActor : PhysicsActor
+    {
+        public BasicActor(Vector3 size)
+        {
+            Size = size;
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int) ActorTypes.Agent; }
+            set { return; }
+        }
+
+        public override Vector3 RotationalVelocity { get; set; }
+
+        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; set; }
+
+        public override bool IsColliding { get; set; }
+
+        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; set; }
+
+        public override Vector3 Size { get; set; }
+
+        public override PrimitiveBaseShape Shape
+        {
+            set { return; }
+        }
+
+        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 Vector3 Velocity { get; set; }
+
+        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; set; }
+
+        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/BasicPhysics/BasicPhysicsPrim.cs b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsPrim.cs
new file mode 100644
index 0000000..5383f1b
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsPrim.cs
@@ -0,0 +1,316 @@
+/*
+ * 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.BasicPhysics
+{
+    public class BasicPhysicsPrim : PhysicsActor
+    {
+        private Vector3 _size;
+//        private PrimitiveBaseShape _shape;
+
+        public BasicPhysicsPrim(
+            string name, uint localId, Vector3 position, Vector3 size, Quaternion orientation, PrimitiveBaseShape shape)
+        {
+            Name = name;
+            LocalID = localId;
+            Position = position;
+            Size = size;
+            Orientation = orientation;
+            Shape = shape;
+        }
+
+        public override int PhysicsActorType
+        {
+            get { return (int) ActorTypes.Agent; }
+            set { return; }
+        }
+
+        public override Vector3 RotationalVelocity { get; set; }
+
+        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; set; }
+
+        public override bool IsColliding { get; set; }
+
+        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; set; }
+
+        public override Vector3 Size
+        {
+            get { return _size; }
+            set {
+                  _size = value;
+                  _size.Z = _size.Z / 2.0f;
+                }
+        }
+
+        public override PrimitiveBaseShape Shape
+        {
+//            set { _shape = value; }
+            set {}
+        }
+
+        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 Vector3 Velocity { get; set; }
+
+        public override Vector3 Torque
+        {
+            get { return Vector3.Zero; }
+            set { return; }
+        }
+
+        public override float CollisionScore
+        {
+            get { return 0f; }
+            set { }
+        }
+
+        public override Quaternion Orientation { get; set; }
+
+        public override Vector3 Acceleration { get; set; }
+
+        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/BasicPhysics/BasicPhysicsScene.cs b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsScene.cs
new file mode 100644
index 0000000..20b337a
--- /dev/null
+++ b/OpenSim/Region/PhysicsModules/BasicPhysics/BasicPhysicsScene.cs
@@ -0,0 +1,256 @@
+/*
+ * 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 Mono.Addins;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.PhysicsModules.SharedBase;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.Framework.Interfaces;
+
+namespace OpenSim.Region.PhysicsModule.BasicPhysics
+{
+    /// <summary>
+    /// This is an incomplete extremely basic physics implementation
+    /// </summary>
+    /// <remarks>
+    /// Not useful for anything at the moment apart from some regression testing in other components where some form
+    /// of physics plugin is needed.
+    /// </remarks>
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "BasicPhysicsScene")]
+    public class BasicScene : PhysicsScene, INonSharedRegionModule
+    {
+        private List<BasicActor> _actors = new List<BasicActor>();
+        private List<BasicPhysicsPrim> _prims = new List<BasicPhysicsPrim>();
+        private float[] _heightMap;
+        private Vector3 m_regionExtent;
+
+        private bool m_Enabled = false;
+
+        //protected internal string sceneIdentifier;
+        #region INonSharedRegionModule
+        public string Name
+        {
+            get { return "basicphysics"; }
+        }
+
+        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);
+            m_regionExtent = new Vector3(scene.RegionInfo.RegionSizeX, scene.RegionInfo.RegionSizeY, scene.RegionInfo.RegionSizeZ);
+            base.Initialise(scene.PhysicsRequestAsset,
+                (scene.Heightmap != null ? scene.Heightmap.GetFloatsSerialised() : new float[scene.RegionInfo.RegionSizeX * scene.RegionInfo.RegionSizeY]),
+                (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 AddPrimShape(string primName, PrimitiveBaseShape pbs, Vector3 position,
+                                                  Vector3 size, Quaternion rotation, bool isPhysical, uint localid)
+        {
+            BasicPhysicsPrim prim = new BasicPhysicsPrim(primName, localid, position, size, rotation, pbs);
+            prim.IsPhysical = isPhysical;
+
+            _prims.Add(prim);
+
+            return prim;
+        }
+
+        public override PhysicsActor AddAvatar(string avName, Vector3 position, Vector3 velocity, Vector3 size, bool isFlying)
+        {
+            BasicActor act = new BasicActor(size);
+            act.Position = position;
+            act.Velocity = velocity;
+            act.Flying = isFlying;
+            _actors.Add(act);
+            return act;
+        }
+
+        public override void RemovePrim(PhysicsActor actor)
+        {
+            BasicPhysicsPrim prim = (BasicPhysicsPrim)actor;
+            if (_prims.Contains(prim))
+                _prims.Remove(prim);
+        }
+
+        public override void RemoveAvatar(PhysicsActor actor)
+        {
+            BasicActor act = (BasicActor)actor;
+            if (_actors.Contains(act))
+                _actors.Remove(act);
+        }
+
+        public override void AddPhysicsActorTaint(PhysicsActor prim)
+        {
+        }
+
+        public override float Simulate(float timeStep)
+        {
+//            Console.WriteLine("Simulating");
+
+            float fps = 0;
+            for (int i = 0; i < _actors.Count; ++i)
+            {
+                BasicActor actor = _actors[i];
+                Vector3 actorPosition = actor.Position;
+                Vector3 actorVelocity = actor.Velocity;
+
+                //Console.WriteLine(
+                //    "Processing actor {0}, starting pos {1}, starting vel {2}", i, actorPosition, actorVelocity);
+
+                actorPosition.X += actor.Velocity.X * timeStep;
+                actorPosition.Y += actor.Velocity.Y * timeStep;
+
+                if (actor.Position.Y < 0)
+                {
+                    actorPosition.Y = 0.1F;
+                }
+                else if (actor.Position.Y >= m_regionExtent.Y)
+                {
+                    actorPosition.Y = (m_regionExtent.Y - 0.1f);
+                }
+
+                if (actor.Position.X < 0)
+                {
+                    actorPosition.X = 0.1F;
+                }
+                else if (actor.Position.X >= m_regionExtent.X)
+                {
+                    actorPosition.X = (m_regionExtent.X - 0.1f);
+                }
+
+                float terrainHeight = 0;
+                if (_heightMap != null)
+                    terrainHeight = _heightMap[(int)actor.Position.Y * (int)m_regionExtent.Y + (int)actor.Position.X];
+
+                float height = terrainHeight + actor.Size.Z;
+//                Console.WriteLine("height {0}, actorPosition {1}", height, actorPosition);
+
+                if (actor.Flying)
+                {
+                    if (actor.Position.Z + (actor.Velocity.Z * timeStep) < terrainHeight + 2)
+                    {
+                        actorPosition.Z = height;
+                        actorVelocity.Z = 0;
+                        actor.IsColliding = true;
+                    }
+                    else
+                    {
+                        actorPosition.Z += actor.Velocity.Z * timeStep;
+                        actor.IsColliding = false;
+                    }
+                }
+                else
+                {
+                    actorPosition.Z = height;
+                    actorVelocity.Z = 0;
+                    actor.IsColliding = true;
+                }
+
+                actor.Position = actorPosition;
+                actor.Velocity = actorVelocity;
+            }
+
+            return fps;
+        }
+
+        public override void GetResults()
+        {
+        }
+
+        public override bool IsThreaded
+        {
+            get { return (false); // for now we won't be multithreaded
+            }
+        }
+
+        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;
+        }
+
+    }
+}