From 30a5e028c5f8bfbd488046879334688fe3cab10e Mon Sep 17 00:00:00 2001
From: Adam Frisby <adam@gwala.net>
Date: Sat, 7 Apr 2007 16:19:49 +0000
Subject: [PATCH] Port to a 2D Heightmap complete

---
 OpenSim.Terrain.BasicTerrain/Normalise.cs     | 83 +++++++++++++++++++
 .../OpenSim.Terrain.BasicTerrain.csproj       |  1 +
 OpenSim.Terrain.BasicTerrain/TerrainEngine.cs |  1 +
 3 files changed, 85 insertions(+)
 create mode 100644 OpenSim.Terrain.BasicTerrain/Normalise.cs

diff --git a/OpenSim.Terrain.BasicTerrain/Normalise.cs b/OpenSim.Terrain.BasicTerrain/Normalise.cs
new file mode 100644
index 0000000000..507795bdd2
--- /dev/null
+++ b/OpenSim.Terrain.BasicTerrain/Normalise.cs
@@ -0,0 +1,83 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenSim.Terrain.BasicTerrain
+{
+    static class Normalise
+    {
+        public static void normalise(float[,] map)
+        {
+            double max = findMax(map);
+            double min = findMin(map);
+            int w = map.GetLength(0);
+            int h = map.GetLength(1);
+
+            int x, y;
+
+            for (x = 0; x < w; x++)
+            {
+                for (y = 0; y < h; y++)
+                {
+                    map[x, y] = (float)((map[x, y] - min) * (1.0 / (max - min)));
+                }
+            }
+        }
+
+        public static void normalise(float[,] map, double newmax)
+        {
+            double max = findMax(map);
+            double min = findMin(map);
+            int w = map.GetLength(0);
+            int h = map.GetLength(1);
+
+            int x, y;
+
+            for (x = 0; x < w; x++)
+            {
+                for (y = 0; y < h; y++)
+                {
+                    map[x, y] = (float)((map[x, y] - min) * (1.0 / (max - min)) * newmax);
+                }
+            }
+        }
+
+        public static double findMax(float[,] map)
+        {
+            int x, y;
+            int w = map.GetLength(0);
+            int h = map.GetLength(1);
+            double max = double.MinValue;
+
+            for (x = 0; x < w; x++)
+            {
+                for (y = 0; y < h; y++)
+                {
+                    if (map[x, y] > max)
+                        max = map[x, y];
+                }
+            }
+
+            return max;
+        }
+
+        public static double findMin(float[,] map)
+        {
+            int x, y;
+            int w = map.GetLength(0);
+            int h = map.GetLength(1);
+            double min = double.MaxValue;
+
+            for (x = 0; x < w; x++)
+            {
+                for (y = 0; y < h; y++)
+                {
+                    if (map[x, y] < min)
+                        min = map[x, y];
+                }
+            }
+
+            return min;
+        }
+    }
+}
diff --git a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
index 21039027dc..328f69de7c 100644
--- a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
+++ b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
@@ -34,6 +34,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Hills.cs" />
+    <Compile Include="Normalise.cs" />
     <Compile Include="RaiseLower.cs" />
     <Compile Include="TerrainEngine.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs b/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
index 60b49aeb70..de0ab50ee8 100644
--- a/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
+++ b/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
@@ -67,6 +67,7 @@ namespace OpenSim.Terrain
             lock (map)
             {
                 Hills.hillsSpheres(this.map, 1337, 200, 20, 40, true, true, false);
+                Normalise.normalise(this.map,60);
             }
         }