From 4a8c1e4393ac64c84b03aeb16bacb9ddd0a2fae6 Mon Sep 17 00:00:00 2001
From: Adam Frisby
Date: Wed, 30 Apr 2008 21:22:29 +0000
Subject: * Commiting a bunch of missed files.

---
 .../World/Terrain/FloodBrushes/SmoothArea.cs       | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 OpenSim/Region/Environment/Modules/World/Terrain/FloodBrushes/SmoothArea.cs

(limited to 'OpenSim/Region/Environment/Modules/World/Terrain/FloodBrushes/SmoothArea.cs')

diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/FloodBrushes/SmoothArea.cs b/OpenSim/Region/Environment/Modules/World/Terrain/FloodBrushes/SmoothArea.cs
new file mode 100644
index 0000000..bdd9f18
--- /dev/null
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/FloodBrushes/SmoothArea.cs
@@ -0,0 +1,114 @@
+/*
+ * 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 OpenSim 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 OpenSim.Region.Environment.Interfaces;
+
+namespace OpenSim.Region.Environment.Modules.World.Terrain.FloodBrushes
+{
+    public class SmoothArea : ITerrainFloodEffect
+    {
+        #region ITerrainFloodEffect Members
+
+        public void FloodEffect(ITerrainChannel map, bool[,] fillArea, double strength)
+        {
+            double area = strength;
+            double step = strength / 4.0;
+
+            double[,] manipulate = new double[map.Width,map.Height];
+            int x, y;
+            for (x = 0; x < map.Width; x++)
+            {
+                for (y = 0; y < map.Height; y++)
+                {
+                    if (!fillArea[x, y])
+                        continue;
+
+                    double average = 0.0;
+                    int avgsteps = 0;
+
+                    double n;
+                    for (n = 0.0 - area; n < area; n += step)
+                    {
+                        double l;
+                        for (l = 0.0 - area; l < area; l += step)
+                        {
+                            avgsteps++;
+                            average += GetBilinearInterpolate(x + n, y + l, map);
+                        }
+                    }
+
+                    manipulate[x, y] = average / avgsteps;
+                }
+            }
+            for (x = 0; x < map.Width; x++)
+            {
+                for (y = 0; y < map.Height; y++)
+                {
+                    if (!fillArea[x, y])
+                        continue;
+
+                    map[x, y] = manipulate[x, y];
+                }
+            }
+        }
+
+        #endregion
+
+        private static double GetBilinearInterpolate(double x, double y, ITerrainChannel map)
+        {
+            int w = map.Width;
+            int h = map.Height;
+
+            if (x > w - 2.0)
+                x = w - 2.0;
+            if (y > h - 2.0)
+                y = h - 2.0;
+            if (x < 0.0)
+                x = 0.0;
+            if (y < 0.0)
+                y = 0.0;
+
+            int stepSize = 1;
+            double h00 = map[(int) x, (int) y];
+            double h10 = map[(int) x + stepSize, (int) y];
+            double h01 = map[(int) x, (int) y + stepSize];
+            double h11 = map[(int) x + stepSize, (int) y + stepSize];
+            double h1 = h00;
+            double h2 = h10;
+            double h3 = h01;
+            double h4 = h11;
+            double a00 = h1;
+            double a10 = h2 - h1;
+            double a01 = h3 - h1;
+            double a11 = h1 - h2 - h3 + h4;
+            double partialx = x - (int) x;
+            double partialz = y - (int) y;
+            double hi = a00 + (a10 * partialx) + (a01 * partialz) + (a11 * partialx * partialz);
+            return hi;
+        }
+    }
+}
\ No newline at end of file
-- 
cgit v1.1