use List

Module/BirdsModule/FlowEntry.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Flocking
+{
+    class FlowEntry
+    {
+        public float X = 0;
+        public float Y = 0;
+        public float Z = 0;
+
+        public float Value = 0;
+
+        public FlowEntry(float x, float y, float z, float value)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+
+            Value = value;
+        }
+    }
+}

Module/BirdsModule/FlowMap.cs

@@ -27,6 +27,7 @@
  */
 
 using System;
+using System.Collections.Generic;
 using OpenMetaverse;
 using OpenSim.Region.Framework.Scenes;
 
@@ -35,12 +36,13 @@ namespace Flocking
 	public class FlowMap
 	{
 		private Scene m_scene;
-        private double[, ,] m_flowMap;
         private uint regionX;
         private uint regionY;
         private uint regionZ;
         private float regionBorder;
 
+		private List<FlowEntry> m_flowMap = new List<FlowEntry>();
+
 		public FlowMap (Scene scene, int maxHeight, float borderSize)
 		{
 			m_scene = scene;
@@ -48,7 +50,6 @@ namespace Flocking
             regionY = m_scene.RegionInfo.RegionSizeY;
             regionZ = (uint)maxHeight;
             regionBorder = borderSize;
-            m_flowMap = new double[regionX, regionY, regionZ];
 		}
 		
 		public int LengthX {
@@ -68,20 +69,20 @@ namespace Flocking
 			//fill in the boundaries
 			for( int x = 0; x < regionX; x++ ) {
 				for( int y = 0; y < regionY; y++ ) {
-					m_flowMap[x,y,0] = 100;
+					m_flowMap.Add(new FlowEntry(x, y, 0, 100));
-					m_flowMap[x,y, regionZ-1] = 100;
+					m_flowMap.Add(new FlowEntry(x, y, regionZ - 1, 100));
 				}
 			}
 			for( int x = 0; x < regionX; x++ ) {
 				for( int z = 0; z < regionZ; z++ ) {
-					m_flowMap[x,0,z] = 100;
+					m_flowMap.Add(new FlowEntry(x, 0, z, 100));
-					m_flowMap[x,regionY-1,z] = 100;
+					m_flowMap.Add(new FlowEntry(x, regionY - 1, z, 100));
 				}
 			}
 			for( int y = 0; y < regionY; y++ ) {
 				for( int z = 0; z < regionZ; z++ ) {
-					m_flowMap[0,y,z] = 100;
+					m_flowMap.Add(new FlowEntry(0, y, z, 100));
-					m_flowMap[regionX-1,y,z] = 100;
+					m_flowMap.Add(new FlowEntry(regionX - 1, y, z, 100));
 				}
 			}
 			
@@ -91,7 +92,7 @@ namespace Flocking
 					int zMax = Convert.ToInt32(m_scene.GetGroundHeight( x, y ));
 					for( int z = 1; z < zMax; z++ ) {
 						if (x < regionX && y < regionY && z < zMax)
-							m_flowMap[x,y,z] = 100;
+							m_flowMap.Add(new FlowEntry(x, y, z, 100));
 					}
 				}
 			}
@@ -119,7 +120,7 @@ namespace Flocking
 						for( int y = minY; y < maxY; y++ ) {
 							for( int z = minZ; z < maxZ; z++ ) {
 								if(x < maxX && y < maxY && z < maxX)
-									m_flowMap[x,y,z] = 100;
+									m_flowMap.Add(new FlowEntry(x, y, z, 100));
 							}
 						}
 					}
@@ -186,14 +187,20 @@ namespace Flocking
 		
 		public bool IsWithinObstacle( int x, int y, int z ) {
 			bool retVal = false;
-            if (x >= LengthX || y >= LengthY || z >= LengthZ)
+
+			FlowEntry flow = m_flowMap.Find(X => X.X == x && X.Y == y && X.Z == z);
+
+			if (flow == null)
+				return retVal;
+
+			if (x >= LengthX || y >= LengthY || z >= LengthZ)
             {
 				retVal = true;
             }
             else if (x < 0 || y < 0 || z < 0)
             {
 				retVal = true;
-			} else if (m_flowMap[x,y,z] > 50) {
+			} else if (flow.Value > 50) {
 				retVal = true;
 			}
 			return retVal;