From 82e18112f2cee5ebb876d430ca8cb4a6c36c1cfd Mon Sep 17 00:00:00 2001
From: gareth
Date: Tue, 13 Mar 2007 11:28:04 +0000
Subject: added movement etc from r191

---
 src/physics/PhysicsManager.cs | 119 ++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 115 insertions(+), 4 deletions(-)

(limited to 'src/physics/PhysicsManager.cs')

diff --git a/src/physics/PhysicsManager.cs b/src/physics/PhysicsManager.cs
index e5d5bd6..1fee628 100644
--- a/src/physics/PhysicsManager.cs
+++ b/src/physics/PhysicsManager.cs
@@ -46,15 +46,21 @@ namespace PhysicsSystem
 		
 		public PhysicsScene GetPhysicsScene(string engineName)
 		{
-			if(_plugins.ContainsKey(engineName))
+		    if( String.IsNullOrEmpty( engineName ) )
+		    {
+                return new NullPhysicsScene();
+		    }
+
+		    if(_plugins.ContainsKey(engineName))
 			{
 				ServerConsole.MainConsole.Instance.WriteLine("creating "+engineName);
 				return _plugins[engineName].GetScene();
 			}
 			else
 			{
-				ServerConsole.MainConsole.Instance.WriteLine("couldn't find physicsEngine: "+ engineName);
-				return null;
+                string error = String.Format("couldn't find physicsEngine: {0}", engineName);
+				ServerConsole.MainConsole.Instance.WriteLine( error );
+                throw new ArgumentException( error );
 			}
 		}
 		
@@ -108,6 +114,14 @@ namespace PhysicsSystem
 	
 	public abstract class PhysicsScene
 	{
+        public static PhysicsScene Null
+        {
+            get
+            {                
+                return new NullPhysicsScene();
+            }
+        }
+	
 		public abstract PhysicsActor AddAvatar(PhysicsVector position);
 		
 		public abstract PhysicsActor AddPrim(PhysicsVector position, PhysicsVector size);
@@ -124,8 +138,49 @@ namespace PhysicsSystem
 		}
 	}
 	
+    public class NullPhysicsScene : PhysicsScene
+    {
+        private static int m_workIndicator;
+        
+        public override PhysicsActor AddAvatar(PhysicsVector position)
+        {
+            ServerConsole.MainConsole.Instance.WriteLine("NullPhysicsScene : AddAvatar({0})", position );
+            return PhysicsActor.Null;
+        }
+
+        public override PhysicsActor AddPrim(PhysicsVector position, PhysicsVector size)
+        {
+            ServerConsole.MainConsole.Instance.WriteLine("NullPhysicsScene : AddPrim({0},{1})", position, size );
+            return PhysicsActor.Null;            
+        }
+
+        public override void Simulate(float timeStep)
+        {
+            m_workIndicator = ( m_workIndicator + 1 ) % 10;
+
+            ServerConsole.MainConsole.Instance.SetStatus( m_workIndicator.ToString() );
+        }
+
+        public override void GetResults()
+        {
+            ServerConsole.MainConsole.Instance.WriteLine("NullPhysicsScene : GetResults()" );
+        }
+
+        public override void SetTerrain(float[] heightMap)
+        {
+            ServerConsole.MainConsole.Instance.WriteLine("NullPhysicsScene : SetTerrain({0} items)", heightMap.Length );
+        }
+
+        public override bool IsThreaded
+        {
+            get { return false; }
+        }
+    }
+    
 	public abstract class PhysicsActor
 	{
+        public static readonly PhysicsActor Null = new NullPhysicsActor();
+	    
 		public abstract PhysicsVector Position
 		{
 			get;
@@ -153,7 +208,61 @@ namespace PhysicsSystem
 		public abstract void SetMomentum(PhysicsVector momentum);
 	}
 
-	public class PhysicsVector
+    public class NullPhysicsActor : PhysicsActor
+    {
+        public override PhysicsVector Position
+        {
+            get
+            {
+                return PhysicsVector.Zero;
+            }
+            set
+            {
+                return;
+            }
+        }
+
+        public override PhysicsVector Velocity
+        {
+            get
+            {
+                return PhysicsVector.Zero;
+            }
+            set
+            {
+                return;
+            }
+        }
+
+        public override PhysicsVector Acceleration
+        {
+            get { return PhysicsVector.Zero; }
+        }
+
+        public override bool Flying
+        {
+            get
+            {
+                return false;
+            }
+            set
+            {
+                return;
+            }
+        }
+
+        public override void AddForce(PhysicsVector force)
+        {
+            return;
+        }
+
+        public override void SetMomentum(PhysicsVector momentum)
+        {
+            return;
+        }
+    }
+
+    public class PhysicsVector
 	{
 		public float X;
 		public float Y;
@@ -170,5 +279,7 @@ namespace PhysicsSystem
 			Y = y;
 			Z = z;
 		}
+
+        public static readonly PhysicsVector Zero = new PhysicsVector(0f, 0f, 0f);
 	}
 }
-- 
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