From 497af009bd1aa59385b2aca86987b619f8647616 Mon Sep 17 00:00:00 2001
From: Adam Frisby
Date: Thu, 24 May 2007 05:44:53 +0000
Subject: * Reduced effect of terraforming brushes by 1000%. * Added new
 exportImage() function to BasicTerrain which will output a gradient-mapped
 image of the terrain which can be uploaded to the grid for things like world
 map images. (shiinnny), will update later with an improved version using the
 bilinear quad method employed in client terrain rendering. * Rebuild project
 & build files for basicterrain with System.Drawing dependency. Prebuild
 updated.

---
 .../OpenSim.Terrain.BasicTerrain.csproj            |  4 +++
 .../OpenSim.Terrain.BasicTerrain.dll.build         |  1 +
 OpenSim.Terrain.BasicTerrain/TerrainEngine.cs      | 41 ++++++++++++++++++++++
 3 files changed, 46 insertions(+)

(limited to 'OpenSim.Terrain.BasicTerrain')

diff --git a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
index 1cdfaf6..5a73897 100644
--- a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
+++ b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.csproj
@@ -66,6 +66,10 @@
       <HintPath>System.dll</HintPath>
       <Private>False</Private>
     </Reference>
+    <Reference Include="System.Drawing" >
+      <HintPath>System.Drawing.dll</HintPath>
+      <Private>False</Private>
+    </Reference>
     <Reference Include="System.Data" >
       <HintPath>System.Data.dll</HintPath>
       <Private>False</Private>
diff --git a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.dll.build b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.dll.build
index d2e6c9f..86c6a5c 100644
--- a/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.dll.build
+++ b/OpenSim.Terrain.BasicTerrain/OpenSim.Terrain.BasicTerrain.dll.build
@@ -21,6 +21,7 @@
                 </lib>
                 <include name="../bin/libTerrain-BSD.dll" />
                 <include name="System.dll" />
+                <include name="System.Drawing.dll" />
                 <include name="System.Data.dll" />
                 <include name="System.Xml.dll" />
             </references>
diff --git a/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs b/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
index 38a4989..e766f71 100644
--- a/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
+++ b/OpenSim.Terrain.BasicTerrain/TerrainEngine.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using System.Drawing;
 using libTerrain;
 
 namespace OpenSim.Terrain
@@ -403,5 +404,45 @@ namespace OpenSim.Terrain
                 heightmap.set(x,y,(double)value);
             }
         }
+
+        /// <summary>
+        /// Exports the current heightmap to a PNG file
+        /// </summary>
+        /// <param name="filename">The destination filename for the image</param>
+        /// <param name="gradientmap">A 1x*height* image which contains the colour gradient to export with. Must be at least 1x2 pixels, 1x256 or more is ideal.</param>
+        public void exportImage(string filename, string gradientmap)
+        {
+            try
+            {
+                Bitmap gradientmapLd = new Bitmap(gradientmap);
+
+                int pallete = gradientmapLd.Width;
+
+                Bitmap bmp = new Bitmap(heightmap.w, heightmap.h);
+                Color[] colours = new Color[pallete];
+
+                for (int i = 0; i < pallete; i++)
+                {
+                    colours[i] = gradientmapLd.GetPixel(1, i);
+                }
+
+                Channel copy = heightmap.copy();
+                for (int x = 0; x < copy.w; x++)
+                {
+                    for (int y = 0; y < copy.h; y++)
+                    {
+                        // 512 is the largest possible height before colours clamp
+                        int colorindex = (int)(Math.Max(Math.Min(1.0, copy.get(x, y) / 512.0), 0.0) * pallete);
+                        bmp.SetPixel(x, y, colours[colorindex]);
+                    }
+                }
+
+                bmp.Save(filename, System.Drawing.Imaging.ImageFormat.Png);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Failed generating terrain map: " + e.ToString());
+            }
+        }
     }
 }
-- 
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