1 files changed, 80 insertions, 0 deletions

diff --git a/OpenSim/Region/CoreModules/World/Terrain/PaintBrushes/RevertSphere.cs b/OpenSim/Region/CoreModules/World/Terrain/PaintBrushes/RevertSphere.cs
new file mode 100644
index 0000000..4ed8a13
--- /dev/null
+++ b/OpenSim/Region/CoreModules/World/Terrain/PaintBrushes/RevertSphere.cs
@@ -0,0 +1,80 @@
+/*
+ * 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 System;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+
+namespace OpenSim.Region.CoreModules.World.Terrain.PaintBrushes
+{
+    public class RevertSphere : ITerrainPaintableEffect
+    {
+        private readonly ITerrainChannel m_revertmap;
+
+        public RevertSphere(ITerrainChannel revertmap)
+        {
+            m_revertmap = revertmap;
+        }
+
+        #region ITerrainPaintableEffect Members
+
+        public void PaintEffect(ITerrainChannel map, bool[,] mask, double rx, double ry, double rz, double strength, double duration)
+        {
+            strength = TerrainUtil.MetersToSphericalStrength(strength);
+            duration = 0.03; //MCP Should be read from ini file
+ 
+            if (duration > 1.0)
+                duration = 1.0;
+            if (duration < 0)
+                return;
+
+            int x;
+            for (x = 0; x < map.Width; x++)
+            {
+                int y;
+                for (y = 0; y < map.Height; y++)
+                {
+                    if (!mask[x,y])
+                        continue;
+
+                    // Calculate a sphere and add it to the heighmap
+                    double z = strength;
+                    z *= z;
+                    z -= ((x - rx) * (x - rx)) + ((y - ry) * (y - ry));
+
+                    if (z > 0.0)
+                    {
+                        z *= duration;
+                        map[x, y] = (map[x, y] * (1.0 - z)) + (m_revertmap[x, y] * z);
+                    }
+                }
+            }
+        }
+
+        #endregion
+    }
+}